The chainsaw overheats and stalls

This article will solve the problem of lawn mowers when they stall at high speeds on gas

When purchasing a lawn mower, you need to be prepared for the fact that, like all other similar tools, it may also develop breakdowns that will require repair.

But you shouldn’t immediately run to the service center and pay a lot of money to the technicians who convince you that there is a serious malfunction in the device.

The lawn mower stalls at high speeds on gas

Perhaps the most common complaint related to gas trimmers is: “The trimmer stalls.”

Naturally, the prerequisite for this may be a fairly severe malfunction. The Patriot gas mower stalls when you press the gas. The lawn mower stalls after starting. The Goodluck 4300 petrol mower stalls at video speeds. At high speed

The lawn mower stalls. But in most cases the situation is even simpler than it seems at first glance.

To cope with such a problem, first try to figure out its causes on your own, because once you find out the reason, it’s even easier to deal with the problem, and from time to time it even self-destructs.

In essence, the circumstances are when the lawn mower stalls at high speeds

, there are quite a lot of these circumstances.

What to do if a lawn mower or saw stalls at high speeds (under load)

VK group for repairing garden equipment Video about the reasons for the unexpected stop of a two-stroke.

The lawn mower stalls or chokes when you press the gas

Clean all the holes inside the carburetor, and most importantly, clean out the debris under the fuel strainer.

Another one is the presence of defects in the power system.

In this case, the lawn mower will stall

at idle speed. The trimmer stalls when you press the gas. Misadjustment or incorrect adjustment of the carburetor can lead to dilemmas with the power system.

Misadjustment can be caused by vibrations that occur during the operation of the lawn mower.

Incorrect adjustment of the lawn mower can be corrected by simply adjusting it in accordance with the requirements indicated in the instruction manual.

In addition, from time to time gasoline trimmers may stall due to the fact that the valve located in the gas tank cap is simply clogged or stuck.

To find out, try using the scythe while loosening the gas cap.

If the device operates properly in this mode, clean the valve.

Moreover, the lawn mower may stall

due to the disgusting flow of fuel into the carburetor

Why then does the device start, you ask?

The reason for this is that at first the fuel gradually flows into the carburetor and there is enough of it to operate at increased power.

But then it runs out and at high speeds the engine begins to stall.

As for the carburetor, the problem here may also be that its body is very overtightened.

The reason why the lawn mower stalls at high speeds

on gas, there may also be an air leak.

We are talking about the likely presence of a place through which air can pass during the heating process of the motor.

Besides everything else, don't forget to check the fuel pickup hose. The lawnmower operates at high speeds. The petrol mower foreman 8404 stalls when it’s hot. At high speeds the brush cutter stalls. The problem may be that it holds poorly or is generally cracked.

These are the main reasons why it may stall

petrol mower.

Why does the chainsaw stall when I press the gas: premises and solution

There are often cases when owners of chainsaws are faced with their breakdown, no matter what model of this type of equipment, because the nature of breakdowns is almost the same for everyone. And now the chainsaw has stalled, so what next? Of course, take the equipment to special services that will repair your “iron friend” for a fee. However, as they say: why is it not easy to pay?

After all, there is an option to disassemble the instrument yourself and repair it, because the damage you will like is insignificant, in the service you will pay a lot for it. However, in order to be able to repair a tool yourself, you need to be able to understand the reasons for its breakdown and methods for eliminating defects. So let's educate ourselves! In this publication, you can easily find answers to questions regarding situations when the tool simply stalls after a specific press on the gas. What do you need, let's get started.

Basic elements of chainsaws

Before we begin to delve into the issues of tool breakdowns and repairs, first let’s figure out what a chainsaw actually consists of. First of all, I would like to note that this tool belongs to the category of equipment in which the work required directly depends on the gasoline engine.

It is also important that chainsaws are equipped with an engine with one cylinder

, and whose work is done on such fuel as gasoline. It should be noted that, despite the similarity with other tools, it does not have a gearbox. And it is replaced by a typical single-stage chain transmission; the means used is the movement of the chain (saw) itself.

Why does the trimmer suffocate when you press the gas.

Essentially, a chainsaw is a fairly ordinary design, but this does not prevent it from being reliable, convenient and capable of fully ensuring uninterrupted and cyclic operation even in rather difficult conditions. This tool consists of a huge range of certain parts “vital” for its correct and productive operation. This is a carburetor, a specific chain tension device, a tire equipped with a chain and other elements.

Before purchasing a chainsaw, be sure to study the options available to our client and choose the brand of chainsaw that is suitable for you.

To make your choice easier, we have compiled a reliability rating of chainsaws for you.

If you have a limited budget, then read the article about Russian chainsaw manufacturers.

Characteristics and possible causes of failure. Fixing the problem yourself

Chainsaws are quite reliable and lightweight designs. If you properly care for them and handle them based on the manufacturer's advice, then they become unusable and very rarely and quite quickly various breakdowns are eliminated. If you are faced with this situation and want to repair your own instrument yourself, without resorting to the help of experts, then delve into the information presented below.

In fact, it is impossible to clearly and accurately determine the reason why the tool does not start.

or stalls when you press the gas, because there are enough reasons influencing all this. Unfortunately, it should be noted that based on the correct selection of the studio, the chainsaw is armed with a conventional two-stroke engine, for its effective performance such conditions as: lubrication, fuel, spark and air are important.

KEY-DOP

Chainsaw fuel tank

As follows, it is the carburetor that produces the fuel-air mixture, the filter cleans the air from dust, the ignition unit and spark plug produce a spark, and the gasoline contains lubricant.

That is why it is necessary to search for the circumstances of this kind of breakdown in order, starting specifically from the easy ones and gradually moving on to the complex ones. Here is a fundamental factor in proper repair, because the person who, without thinking, begins to disassemble the carburetor, puts it at risk. Because this kind of unit must be repaired or adjusted directly in special workshops

(read about carburetor adjustment).

An important fact is that for trouble-free operation of the tool, it is necessary to be quite attentive to the fuel itself. Since if this kind of mixture is not prepared correctly, then most chainsaws simply will not start. Consequently, not every owner will think to look for the cause of the breakdown in the fuel. That is why, in order for your tool to always work correctly, you need to use only high-quality gasoline for the mixture.

Why does the chainsaw not pick up speed and stalls?

If the saw is unable to gain speed or stalls when you press the gas, then this is probably due to a leaky carburetor or crankcase. This problem can be resolved by checking for leaks without adjusting the carburetor.

Already today, this malfunction you will like is associated with a defect in the fuel tank breather. Due to the formation of a vacuum in the fuel tank during the operation of the chain saw, the required volume of the fuel mixture does not enter the engine, for this reason it is not able to gain speed, otherwise it stalls. If you stop the chainsaw, open or close the fuel tank, or turn it on again, then the oil will work normally for about five minutes, and then it will again stop picking up speed, or, in other words, it will stall.

The next possible reason that the chain saw is not able to gain speed is perhaps excess carbon deposits in the muffler, which makes it difficult for exhaust gases to escape, which reduces power and engine speed.

Any tool can break and the Stihl MS 180 chainsaw is no exception. Today we will try to understand such questions as: why the chainsaw stalls when the speed increases, also at idle and at full speed. Let's consider options for diagnosing and troubleshooting problems associated with this behavior of the Shtil 180 chainsaw.

The lawn mower stalls or chokes when you press the gas

TRIMMER

petrol STIHL stalls
at
full throttle CAUSES OF DISEASE!

And also use only the oil that is made by the manufacturer of your tool. In addition, it is important to prepare this kind of mixture in the amount that you will definitely use in one or two weeks, but no more (see the proportion of gasoline and chainsaw oil).

Because otherwise, overexposure of the mixture directly in the canister will lead to it losing all its octane properties and this will lead to significant problems with the instrument.

• The cause of a breakdown can also be the direct pouring of the mixture into the spark plug at the moment when the mechanism is started
  . In order to solve this problem, you need to turn out and dry the candle, but remember that it should not be heated under any circumstances. Excess fuel must be drained through the hole (spark plug), wait 20-30 minutes, then put it back in place and try to start the tool again.
• The chainsaw stalls when you press the gas because no spark
  . This can happen when there is no good contact between the tip of the spark plug and the wire (high voltage). However, if this kind of connection works correctly, but there is still no spark, then the ignition unit (electronic) is the cause. It is important to note that these types of spare parts cannot be repaired, so they can only be replaced.

  Inspection of the spark plug

Do not forget that by examining the spark plug you can obtain significant information regarding the breakdown of the chainsaw. Since if its surface is dry, then the reason for this is the cylinder, into which fuel is not directly supplied. That is why you will have to check the entire range of its supply step by step. If the spark plug is covered in black soot, this means that the carburetor is not working properly, that is, it supplies either a lot of fuel or pours oil directly into gasoline.

• If the chainsaw stalls when gas is added, this means that there is not enough fuel supplied for the chainsaw to fully operate
  . The reason for this may be either a clogged carburetor (its jet) or contamination of the filter itself (fuel). Remember that the first unit should be checked exclusively by professionals, but you can clean the second one yourself.
• In addition, the cause of breakdown can be the filter (air) if it is contaminated with dust
  . But do not forget that each model has its own easily eliminated and characteristic features. It is for this reason that do not hastily start disassembling and repairing the instrument, but it is best to “walk” through the forums, where there are a huge number of reviews from various owners, so as not to make things worse.

Since, for example, a Stihl chainsaw stalls when you press the gas for a simple reason, namely a simple clogging of the direct breather.

Read also:  Rating of cordless trimmers

In order to solve this kind of problem, all you have to do is disconnect the (fuel) hose from the carburetor and pay attention to whether fuel is leaking out of it. Since if the mixture flows in a full stream, this means that the breather is not contaminated, but if on the contrary, then the cause of the breakdown has been found.

• Here is another reason why a chainsaw stalls when you press the gas - muffler
  . It is this part that can interfere with the full operation of the tool in cases where it is directly contaminated with exhaust resinous deposits. To do this, you just simply need to clean it.
• Quite often the chainsaw partner stalls when pressed and the reason for this is cylinder-piston group
  . Since by examining them, namely the piston and cylinder, you can easily determine the cause of the tool malfunction by directly replacing them. You can also directly bore the cylinder itself relative to the dimensions of the new piston.

  Chainsaw piston

But if after inspection you find that there is no damage on both the piston and the cylinder, then the reason may lie directly in the rings (piston). To do this kind of check, you need to insert a piston into the cylinder and carefully begin to rock it using a connecting rod. If you suddenly feel play, then the rings need to be replaced, as they are already worn out.

• Many people wonder: why does the chainsaw stall when I press the gas? The answer may also lie in insufficient chain lubrication
  (see chain saw oil), since the oil line may be leaking, or the direct channels may simply be clogged. That is why pay attention to the chain, because if it is dry, then without delay, start cleaning the channels that supply oil directly to the tool tire. Then inspect in detail the parts where the oil pump fittings are connected to the pipes. But if you notice that oil is leaking at the joints, or you find cracks in the tubes themselves, then in the first case, seal the leaks with sealant, and the tubes will have to be replaced.

First of all, what you should remember when purchasing this kind of tool is that certain parts of the saw need to be replaced with new ones after their service life (passport) has expired. It is for this reason that the instructions should always be at your fingertips, since everything is described there in detail.

These types of parts include: a sprocket (drive), a tire, part of the system (anti-vibration), as well as a chain

. Since we should not forget that if this “filling” is not replaced with a new one at the required time, then these worn-out spare parts will negatively affect the remaining parts of the chainsaw. It is for this reason that you should check the depth of the immediate tooth cutting quite often. Remember that it should not be higher than 0.5 mm a week.

Chainsaw Stalls When Heated

Content

Why does a chainsaw stall under load?

The chainsaw starts and stalls, the reason

A chainsaw has long been no longer a luxury, but a necessary tool for anyone who has at least some suburban area. With its help you can carry out gardening work, harvesting firewood, processing lumber and much more. There are many models of chainsaws on sale, varying both in power and overall quality. You can verify this here. e-catalog.ru

But no matter what equipment can be capricious, and chainsaws are no exception. Let's look at more relevant obstacles.

The tool stalls immediately after starting

One of the likely circumstances is a lack of fuel. Check the amount of fuel in the gas tank and add as needed. In all this, you should strictly follow the advice in the instructions, especially with regard to the properties of gasoline and oil. In our country, such subtleties are often ignored, filling the saw with whatever is necessary, which causes accelerated wear of the motor and leads to failures.

The saw may also stall due to poor contact between the spark plug and the high-voltage wire. This may be caused by mechanical shear or carbon deposits. From time to time, it is recommended to occasionally replace the candle with a new one, even if the old one did not show any problems in operation.

The chainsaw can work normally when in a straight horizontal position, but stalls when tilted to the side. Usually this is also associated with a lack of fuel: the fuel pipe rises when tilted, and if there is not enough fuel, then it rises above the fuel level.

Chainsaw stops idling

Firstly, it is recommended to check the muffler, because its contamination can lead to a deterioration in the exhaust gases, which is why the engine stops.

If cleaning the muffler did not help resolve the problem, and your saw has a carburetor engine, then you can try adjusting it. Most engine models have coarse and fine adjustment bolts (H and L, respectively). By increasing the engine speed with their help, you can eliminate the problem. Keep in mind that carburetor adjustment is a fairly specialized process that requires the implementation of a tachometer.

The engine cannot withstand the load

If the chainsaw stops right in the middle of a particularly thick log, then the problem may be caused by problems in the fuel supply system or problems with the air filter. The engine simply does not get enough flammable consistency to work with a heavy load, and it stops.

The usual solutions to these problems are changing the fuel in strict accordance with the advice in the annotation (we have already talked about this) and cleaning (replacing) the air filter.

The chainsaw stalls when the speed increases

The prerequisites for this phenomenon are similar to the previous ones: either a problem in the fuel system or in the air filter. Try to disconnect the fuel hose from the carburetor - if gasoline flows poorly (but you definitely understand that there is fuel in the tank), then the reason is the gasoline filter. You can also check the fuel pump - fuel should not penetrate through it. If this happens, then the pump must be changed.

Why does the chainsaw stall?

There are several reasons why a chainsaw stalls. And, usually, almost all of them can be solved without the help of others, without going to a service center.

First, check the filters: fuel and air. If they are clogged, then this is probably the reason the tool is not working properly. At the same time, dirt is not always visible to the naked eye. Therefore, even if everything seems to be in order, it is better to carry out this function.

READ Chainsaw Pressing Gas Stalls

The second reason may be the candle. Do you remember the last time you changed it? According to the rules for operating chainsaws, this should be done once a year.

If this does not help, then it is worth trying to adjust the carburetor. Perhaps vibrations when working with a chainsaw have lost its factory settings.

If the saw stalls after long-term storage, for example, in an unheated garage, then it’s worth checking the fuel line. As a rule, this is a rubber tube, which can crack due to dampness and temperature changes and cause the chainsaw to malfunction.

If none of the above helped, then, most likely, the breakdown is more severe, and, unfortunately, you will have to contact the workshop.

What to do if your chainsaw stalls?

• The car stalls at idle: probable reasons
• Problems of fuel and air filters and their elimination
• Difficulties with the spark plug and methods for solving them
• Substandard carburetor operation
• Problems related to incorrect operation of the fuel system
• Difficulty idling due to a faulty muffler
• Malfunctions of the cylinder-piston group

Builders, installers, rescuers and summer residents #8211 they all at some point, while carrying out their tasks, take up a chainsaw. And the final outcome of their activities depends almost entirely on how well this tool works.

A chainsaw is used to cut wood.

It should be noted that a chainsaw is a relatively lightweight device. Still, like other mechanisms, it sometimes fails. When a chainsaw stalls while idling (this is one of the most common malfunctions), the biggest problem #8211 is to determine the reasons for this behavior of the device. If the source of the “disease” is correctly identified, returning the device to a working position will not be so difficult.

Therefore, first you need to find out what malfunctions a chainsaw has and what leads to the engine stopping at idle.

The car stalls at idle: possible reasons

In order to answer the question of why the saw, sometimes capricious, stalls at idle , we must understand that this tool is based on an ordinary two-stroke internal combustion engine.

It follows from this that malfunctions are caused by various problems with the main components of any internal combustion engine: fuels and lubricants, the ignition system, the quality of the air-fuel mixture and compression inside the cylinder.

The main engine malfunctions include the following:

• the engine won't start
• starts, but, working unstably, quickly stalls at idle
• The chainsaw runs fine at idle, but stalls under load.

The prerequisites for idle speed violations may be different. But all of them can be reduced to several general positions. So, the following difficulties lead to internal combustion engine malfunctions:

Internal combustion chainsaw engine.

probable clogging of the fuel and air filter

• deficiency or problems with the spark plug
• a violation in the initial carburetor settings caused by strong vibrations during operation of the mechanism
• disadvantages of the gas pipeline
• incorrect ratio of ingredients in the “fuel mixture”
• muffler contamination
• malfunction of the cylinder-piston group.

Chainsaw stalls when pressing on gas

The video discusses a fairly common malfunction of chainsaws

and 100% carburetor option method. How did you do it?


Chainsaw stalls while working

The chainsaw stalls

at work.
During operation
, the Partner 370
chainsaw stalls
. Causes of malfunction

Read also:  Tractor MTZ 82.1 - negative reviews. Neutral. Positive. + Leave a review Negative reviews Rzhevsky https://avtomarket.ru/opinions/MTZ/82/29350/ I’ll add that to the company that sold us the tr

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Problems with fuel and air filters and their elimination

The chainsaw will stall at idle if the fuel or air filter is clogged. To find out the condition of the first element of the fuel system, you should disconnect the fuel line from the carburetor. If, during pumping, fuel is supplied in doses that correspond to the specified standards, then the cause of the malfunction should be looked for elsewhere. If gasoline flows weakly to the carburetor or does not flow out of the hose at all, then most likely the filter is clogged with debris.

To clean it, it is removed from the tank (all fuel must be drained from the tank before this point). Removal occurs through the filler neck of the tank using a wire hook. The filter is disconnected from the suction hose. If possible, clean the filter. If this is not possible or it is impractical to do this for a number of reasons, the used filter is replaced with a new one.

READ Carburetor Adjustment for Carver Chainsaws

The chainsaw may stall if the fuel filter becomes clogged.

The air filter can also become clogged with dirt or dust, causing rough idle . It should be remembered that this filter becomes clogged quite often, making it difficult for air to enter the system. The proportion of gasoline in the fuel-air mixture increases, and it becomes excessively enriched. In this case, normal engine operation cannot be expected.

To clean the air filter, remove it with extreme care so as not to shake dust into the carburetor. Next, it is cleaned and washed thoroughly. Detergent is added to the rinsing water. After drying, the air filter returns to its place in the chainsaw.

For normal operation of the cutting tool, it is recommended to change the fuel and air filters every 3 months.

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Spark plug problems and how to solve them

It is generally recommended that this key component of the ignition system be replaced at least once a year. But saw owners often forget about this rule. And therefore, you should not be surprised that a device, the maintenance of which is carried out fragmentarily, ultimately “holds” idle speed poorly.

The spark plug of a chainsaw needs to be changed once a year.

Therefore, you should pay attention to the following malfunctions associated with the operation of this system:

1. Filling the spark plug with gasoline at start-up. To eliminate the problem, turn the candle out and dry it without calcining it. Excess gasoline is drained from the engine through the socket into which the spark plug is screwed. After a break of 30 minutes, the candle is installed in place and the mechanism starts.
2. Lack of spark due to poor contact of the spark plug tip with the high voltage wire. The connection is checked, and if it is broken, the defect is eliminated.
3. There is no spark due to a faulty electronic ignition unit. If you are confident that the connection between the tip and the high-voltage wire is reliable, but there is still no spark when the starter is turned on, then the cause of the breakdown may be a malfunction of the ignition unit. This component is not restored, it is only replaced with a new one.
4. Incorrect gap between spark plug electrodes. In different types of candles this figure ranges from 0.2 to 0.5 mm. The correct gap is set using a feeler gauge of the appropriate thickness. A larger or smaller gap for a given type of spark plug is not allowed.

Meanwhile, during an initial inspection of the spark plug, it may turn out that the reason why the chainsaw refuses to work does not lie in defects in the spark plug or other elements of the ignition system.

Spark plugs can indicate a malfunction of the saw.

So, if the spark plug turns out to be completely dry, this may mean that the original problem lies in the impossibility of fuel entering the combustion chamber. In this case, you should check the entire gasoline supply chain from the carburetor itself.

At the same time, the presence of characteristic black soot #8211 on the spark plug body is a sign that the carburetor is probably poorly adjusted. Because of this, the fuel mixture becomes oversaturated with gasoline. There may be oil in the fuel. In this case, you should clean the spark plug, replace the fuel and adjust the carburetor.

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Substandard carburetor operation

If it turns out experimentally that the filters are clean and the ignition system is not to blame for the fact that the chainsaw is not able to function at idle, the owner of the tool is recommended to switch his attention to the carburetor.

You need to disassemble and reassemble the carburetor without haste, since it contains many parts without which it will not be able to work.

Often, unstable operation is caused by misalignment of this unit, which is responsible for supplying a certain volume of air-fuel mixture to the engine cylinder. It can be adjusted with three special screws located on the carburetor: screws for maximum and minimum speed, as well as a screw that controls idle speed.

Some manufacturers, fearing unwanted interference from incompetent people, supply their products with only one idle screw. But in both cases, carburetor adjustment can be made only by strictly following all the manufacturer’s instructions.

However, even after adjusting the carburetor, in accordance with factory standards, this unit may act up. Then it is recommended to clean the fuel and air channels, jets, and filter element mesh. If the membrane is damaged, it must be replaced with a new one of high quality.

READ Chainsaw Efko 137 Carburetor Adjustment

When carrying out maintenance and repair of a carburetor, you should always remember that it is usually stuffed with many very small parts, without which the device simply cannot work properly. Therefore, the carburetor should be disassembled and reassembled without haste and with extreme caution.

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Problems associated with improper operation of the fuel system

The chainsaw periodically stalls at idle also due to a violation of the integrity of the fuel line or an incorrect ratio of the ingredients of the “fuel mixture” consisting of gasoline and oil.

Before each switching on of the cutting mechanism, it is necessary to visually inspect its blocks and components, paying attention to possible defects in the surface of the housing, mechanical damage, and leaks of working fluids. This should also be done for the saw's fuel line, which is usually a rubber tube.

If the device was (especially for a long time) in a damp place and had to withstand sharp fluctuations in air temperatures, this tube could simply crack. This fuel line is not suitable for further use and should be replaced.

Another reason why a chainsaw may stall at idle is failure to comply with the ratio of ingredients when preparing the “fuel mixture”. The proportions of gasoline and oil included in it must exactly correspond to the branded instructions for a particular device. If they are not followed, the engine will not be sufficiently lubricated, and the entire mechanism will persistently stall.

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Idling problems due to a faulty muffler

If there is a noticeable drop in the power of the internal combustion engine at idle, after which the car often stalls, you need to remember to check the muffler. The fact is that this unit may be heavily clogged with resinous particles and combustion products of the spark extinguisher, which fall out on the walls of the muffler in the form of thick deposits.

As a result, the resulting impermeable layer interferes with the normal exhaust of exhaust gases. This situation must definitely be corrected. A simple repair of a clogged muffler is carried out as follows.

Cleaning the muffler with a dry cloth is not allowed, as carcinogenic carbon particles can enter the respiratory tract.

The muffler is removed from the engine and disassembled (if this type of muffler can be disassembled). In this case, it is necessary to plug the remaining holes from under the muffler.

The entire assembly and its individual parts are thoroughly washed with a rag soaked in water and detergents. If the muffler is dismountable, wait until all its parts are completely dry. The non-removable unit is dried using an ordinary household hair dryer. Cleaning this device with a dry cloth is not allowed, otherwise carcinogenic particles that form carbon deposits may enter the human respiratory tract.

As a preventative measure for the normal functioning of the muffler of two-stroke internal combustion engines, it is recommended to use only high-quality oil in the “fuel mixture” of chainsaws and only that which is prescribed by the manufacturer of this unit.

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Malfunctions of the cylinder-piston group

It is possible that even after eliminating all the listed causes of malfunctions, the chainsaw will continue to stall at idle or not start at all. In this case, you will have to look into the very heart of the #8211 engine, its cylinder.

Sometimes even a visual inspection is enough to determine what is wrong with the cylinder-piston group. Chips, scuffs, obvious wear of the cylinder and other visible defects #8211 are direct obstacles to the normal operation of the device. Without any doubt, such spare parts must be replaced.

If there is no obvious damage, then you need to examine the piston rings. It is damage to these rings that leads to loss of engine power. Too free movement of the rings in the cylinder grooves indicates that it is time to replace these spare parts with new ones.

Meanwhile, a complete picture of the technical condition of this group of parts can only be obtained after a complete disassembly of the engine. Since this is a labor-intensive, responsible task that requires certain professional experience, it is better to entrust it to a specialist. This is the only way to extend the working life of the great human assistant #8211 chainsaw.

To sum it up...

Definitely, every item we buy has its own expiration date and sooner or later it breaks, and it becomes a shame when the degree of its breakdown is so great that it cannot be repaired. But you must admit that quite often we are simply negligent in our use of technology (see about proper operation and how to properly cut down a tree so that it falls in the right direction), and when it stops working, then we try to find ways to fix the breakdowns, resulting in a huge number of services.

But remember that even though the equipment breaks down, we can extend its “life”

. All that is necessary is to simply take care of it, break it in after replacing parts (read how chainsaws are broken in here) and keep its spare parts clean and tidy. And then, undoubtedly, it will serve for many more years. It is also important to use exclusively high-quality spare parts and “additives” (see attachments for chainsaws). Then your equipment will work smoothly, and you will simply forget what repairs are.

In this article we will look at the problem of why the lawn mower stalls and how to deal with this problem.

Even a very good brush cutter can have problems starting. For example, it starts and stalls. Most likely, this indicates problems with the filters - air or fuel. If it stalls at idle, then most likely the brush cutter has problems with the carburetor, which overheats too quickly and can no longer cope with the formation of a high-quality air-fuel mixture.

If the trimmer stalls when you press the gas, that is, when the engine starts to run at high speeds, then this indicates problems with the carburetor or fuel filter.

Problems with a lawn mower with an air filter will be indicated by the fact that it stops working when the air damper is opened.

Please note that the Well Part online store offers you the widest assortment and the best prices.

Calm Chainsaw High Idle Speed

Content

For what reasons does Shtil 180 stall at idle or full throttle?

Any tool can break, and the Stihl MS 180 chainsaw is no exception. Now let’s try to understand questions such as: why does the chainsaw stall when the speed increases, also at idle . Let's look at options for diagnosing and eliminating defects associated with this behavior of the Shtil chainsaw

180.

Why does a chainsaw stall when you press the gas?

Let's say the chainsaw operates normally at idle, but when you press the gas sharply it stalls. What is the possible reason? It’s immediately clear that the problem is not the ignition (lack of spark), because if the ignition was faulty and there was no spark, the tool simply would not start. This means the fuel system remains.

There are many defects in the fuel system that allows for accounting (software), and in order to determine a clear reason why the Shtil 180 chainsaw stalls when you press the gas, you need to carry out a full diagnosis of it. We advise you to read about the most common faults of the Shtil chainsaw

180 and eliminating these defects.

Filter check

The first thing you need to check is the fuel filter.

Sometimes, a filter clogged with dirt is unable to pass through the fuel mixture in sufficient quantities. Accordingly, a lack of fuel appears in the system, which leads to the fact that when you press the gas of the chainsaw, the fuel burns out, and the new one does not yet have time to arrive and, as a result, the Shtil chainsaw stalls. Also, if the fuel filter is clogged, there may be a noticeable drop in the power of the chainsaw at high speeds, but this is only with minor contamination.

Air filter

On the Internet, you can find information that the Shtil 180 chainsaw may stall due to severe contamination of the air filter. I would like to refute this incorrect information and say what it really is, that the Shtil MC 180 carburetor is equipped with a compensator, which was designed and installed if you set a goal to take in the air needed for the normal operation of the Shtil 180 chainsaw, bypassing the dirty air filter

. Naturally, the power with a clogged air filter will drop a little, but it definitely won’t stall. The power may also drop due to piston wear; here the Stihl MS 180 piston chainsaw will need to be repaired.

READ How to Disassemble a Shtil Chainsaw Video

Carburetor

One of the reasons why a chainsaw does not develop speed when you press the gas, but rather stalls, is a malfunction of the carburetor. Let’s say the Shtil 180 saw worked properly, and after it was installed, it was not used for a long time. After starting it, it works fine at idle, but when you press the gas it can stall. Why does it stall? The reason is a stuck carburetor valve nozzle. Naturally, this is not 100%; unfortunately, the possibility of such a malfunction is extremely high. We recommend reading the article about the design and repair of the Shtil 180 carburetor.

If you set a goal to check the nozzle, you need to remove the carburetor and disassemble it. To remove, you need to unscrew the two nuts securing the air filter and the carburetor, then remove the air filter and the engine control lever, while disconnecting the air damper control rod from the carburetor. Next, you just need to slightly pull the carburetor towards you and disconnect the fuel supply hose.

It is necessary to very carefully remove the fuel hose, and prepare a plug here in advance, since with its use fuel must flow.

Having removed the carburetor, it must be blown out and cleaned of dirt, only after this there is an option to unwind the carburetor.

You need to unscrew the cover of the main chamber of the carburetor; this is the one on which the compensator is installed on top. Next, use an 8 mm bolt and a length of more than 50 mm. We knock out the valve.

Chainsaw Stihl MS 180 tasks with speed

Chainsaw Stihl

The MS 180 has certain aspects that make owners worry and is expensive.

The Calm 180 MS does not slow down.

With the carburetor screw turned to zero, huge revolutions

.Change bearings and seals.

You need to knock out the valve by placing the carburetor on a wooden stand, this will protect it from damage to the body.

When the nozzle is removed, you can blow it out using a compressor. The valve must allow air to flow exclusively in one direction; if, of course, the valve is free to blow in both directions, it means it is faulty and needs to be replaced with a new one. If the valve has been repaired, you must reassemble the chainsaw in the reverse order of disassembly.

READ Chainsaw Tire Stihl 180

You can clearly see how a carburetor is repaired, or more precisely, how to correctly knock out the injector valve from the carburetor body by watching the video.

The next common reason why a saw may stall when the speed increases is air leaking into the carburetor. This can only be checked with a special tool, but it is worth seeing that if preventative work on the carburetor has not been carried out for more than one year, then there is an option to install a new set of gaskets in the carburetor. Sometimes this helps solve the problem of its depressurization.

When disassembling the carburetor to change the gaskets, you need to closely examine its needle valve, press on the rocker arm and check its lifting. From time to time, especially if chainsaw has been standing for a long time with fuel in the carburetor, the needle may burn to the carburetor body and not do its intended purpose. Simply put, the needle valve will not allow the fuel mixture to pass through. Here, the saw doesn't work.

Why does it stall at idle?

The first and most common cause of this malfunction is incorrect carburetor adjustment. Of course, you can adjust the idle speed without the help of others; for this purpose you need to have a Stihl adjusting screwdriver, which is supplied with the unit. The adjustment hole is located on the right side of the Shtil 180 saw on the handle and is marked with the signs “-” and “”.

If the Stihl chainsaw does not maintain speed and stalls at idle , you can be virtually 90% sure that it has a malfunction in the fuel pump operating system, usually this is air leaking into the crankcase through the pan gasket, or, more often, through the crankshaft oil seals. The air intake reduces or completely stops the pulse, which is supplied through special channels to the fuel pump of the chainsaw. Upon completion of this, the Stihl 180 chainsaw does not receive the required amount of fuel and stalls at idle.

Conduct diagnostics, of course, using a special device called a vacuum gauge.

The second method to check the performance of the oil seals is to pour gasoline into the engine crankcase and see if the oil seals allow gasoline to pass through, which means they are providing normal pressure in the crankcase, which will make idling impossible. And during operation at high speeds, with leaky oil seals, there is a possibility of jamming of the crankshaft bearings.

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The method for checking the crankcase and seals Shtil 180 for tightness is as follows:

1. The top cover is removed.
2. The air filter housing and carburetor are dismantled.
3. The chainsaw handle is removed.
4. The starter spins up and retracts.
5. The side cover and drive sprocket are removed from the side opposite the starter.
6. A piston stopper, as it is also called, is installed in the spark plug hole; a cord from an old starter with knots tied to it is stuffed into the cylinder.
7. The flywheel and clutch are unscrewed, after which the parts are removed. It is worth knowing that the chainsaw clutch has a left-hand thread and unscrews clockwise.
8. The oil pump drive gear is removed.

Having disassembled the Stihl MS 180 chainsaw, we find the seals; after this fact, you need to fill the crankcase with gasoline and check for leaks. Fill the crankcase, of course, through the fuel window in the cylinder; for this purpose the piston must be raised very high. If leaks are detected, the defective seals need to be replaced, in other words, the pan must be sealed again. You can assemble Shtil 180 by following the reverse sequence of the method.

Why does it stall at full speed?

We often hear the question why a chainsaw stalls at full speed. There may be several circumstances. That's all, you need to take into account exactly how the saw stalled. Let's say the tool was working normally and suddenly, without apparent circumstances, it suddenly stalled and in this case the starter does not turn over. Under these circumstances, there is an option to be 100% sure that the chainsaw is jammed and it is necessary to begin serious repairs.

The second situation is when the Shtil 180 chainsaw was working normally, then gradually over a short period of time it lost power and stalled, while overheating of the cylinder was observed. Then, most likely the reason is air leakage under the rubber pipe connecting the carburetor to the cylinder or its rupture. The mixture became lean, resulting in overheating. Remove the cause, of course, by changing the pipe.

Conclusion

If the chainsaw is Stihl

The MC 180 stalls at idle, does not gain power when you press the gas, or even stalls at full speed, you need to diagnose the fuel accounting system and inspect the crankcase for tightness. You can do this without the help of others, but you need to have certain abilities. If you are not very familiar with push-pull saws, it is better to turn to specialists, since this technique is quite capricious and any mistakes are expensive.

Source

What to do if the lawn mower starts and stalls?

Now let's look at all the problems described above in more detail.

1. The lawn mower stalls when you press the gas.

In principle, there can be a huge number of reasons why the engine of a brush cutter stops working when you press the gas. Here we will consider only the most common ones.

Perhaps the air damper is simply clogged. And to eliminate the problem, it will be enough to simply clean the air damper. Also, the engine stalls due to a clogged air filter. To clean it, the filter should first be washed in a solvent and then blown with a stream of compressed air.

A similar procedure should be carried out with a clogged fuel filter, which prevents the flow of fuel in the required volume when the engine speed increases.

The engine may stall for other reasons. Firstly, the spacer located between the cylinder and the carburetor wore out, and secondly, the crankshaft seals began to suck in air.

2. The brush cutter stalls when it gets hot.

We have already indicated that in this case the problem is in the carburetor. Due to increased temperatures, gasoline begins to boil in it, which is why the air-fuel mixture ceases to form or its quality critically decreases.

In addition, this problem may arise due to the fact that the carburetor is equipped with a rotary valve rather than a disc valve. If the problem has become chronic, then it should be solved radically - by purchasing a new carburetor with a disc valve.

3. The brushcutter starts and stalls.

Most likely, access to the fuel tank is difficult or completely absent, which is why a zone of low pressure is formed in it, due to which the engine stops receiving fuel in the required quantity and because of this you stop working.

4. The brush cutter stalls at idle speed.

The engine may stall at idle for the following reasons:

To fix most problems you will need spare parts, and Well Part is ready to provide them to you at the best price.

Calm 180 Heats Up and Stalls

Content

Reasons why a chainsaw starts and stalls

A chainsaw has long been not a luxury, but a necessary tool for those who have a summer cottage or home ownership. But, like any other equipment, this tool tends to fail, despite its simple design.

The classification of main faults includes:

• complete lack of engine starting
• engine starts and stalls
• unstable operation of the tool
• stop work under load
• loss of power.

If the chainsaw does not start at all, the reason may be the following:

1. Manufacturing defect
2. Lack of fuel
3. Problems starting the ignition system
4. No spark from spark plugs
5. Poor fuel mixture
6. Carburetor clogged
7. Problems with high voltage wire
8. No compression.

Why does the chainsaw start and stall, what to do in this case? The reasons for this need to be examined in detail.

The chainsaw starts and stalls: reason, video

The reason that a chainsaw may stall immediately after the factory is due to a malfunction of a certain piece of equipment.

1. The most common reason why a chainsaw starts and stalls may be a low fuel level in the tank. This can be confirmed by the tool stopping when tilted, when fuel residues accumulate in a certain place in the fuel tank. If the fuel is of poor quality, problems with the operation of the chainsaw may also arise; in this case, it needs to be completely replaced.
2. A clogged breather, which significantly reduces fuel flow to the engine.
3. Insufficient contact of the wire cap with the spark plug, which leads to strong heating of the spark plug insulator. Deterioration of contact may occur due to mechanical shear or carbon deposits.
4. Broken spark plugs.
5. The muffler is clogged, due to which the exhaust gases are deteriorated, leading to the engine stopping. For this reason, the chainsaw may start and stall at idle. Sediment in the muffler can also appear due to low-quality fuel or improper use of the tool.
6. Poor carburetor adjustment.
7. Piston group failure
8. Problems with the fuel filter or pump. In this case, gasoline may leak through the pump or flow poorly through the fuel filter to the carburetor. As a result, the chainsaw starts
   and stalls as the speed increases.
9. Air filter dirty. Problems with this piece of equipment lead to the fact that, with increased loads on the engine, it simply cannot cope with them due to blockage and stops. A similar result is also obtained with increasing speed.
10. Short circuit due to lack of or insufficient lubrication, as well as a problem with the chain brake.

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Shtil 230 stalls after short-term operation

The piston does not fit the cylinder.

Why does a chainsaw have trouble starting and stalling?

If the equipment starts poorly “on cold”, the problem may be a lack of compression, i.e. The rings are worn out due to long service life and need to be replaced. Sometimes the reason that the engine does not start well when it is not warm is a problem with the muffler, as well as poor contact between the spark plug and the wire.

Also, reasons for poor starting may be wear or damage to the gasket or rubber cuff in the accelerator pump of the carburetor, which causes additional air flow, leading to an increase in saw speed.

Troubleshooting

The operation of the equipment must be correct, with periodic inspection of the component elements to prevent damage. To troubleshoot problems, you need to check all components of the equipment to ensure they are functioning.

If the chainsaw starts and stalls , the cause can be eliminated on your own. If it is a lack of or incorrectly prepared fuel mixture, this must be corrected. For prevention, when the chainsaw is idle, you should always drain the remaining fuel.

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It is necessary to periodically check the spark plugs. In this case, you should remove carbon deposits that are clogging the connection gap, and also check the tips for the presence of fuel. Another cause of problems with spark plugs can be that they get wet with gasoline. To do this, they need to be removed, wiped with a rag and left to dry. Faulty spark plugs are replaced.

If there is no spark between the spark plug and the high-voltage wire, but there is a good connection between them, it is necessary to replace the ignition unit.

A clogged muffler is a common cause of a breakdown in which the chainsaw starts and immediately stalls. To eliminate the malfunction, you need to dismantle the muffler and clean it of carbon deposits using sandpaper or a special chemical solution. If the chainsaw model is non-separable, chemicals are poured into the system and left there for several hours, then it is purged.

The carburetor needs to be adjusted if the chainsaw stalls at idle. Fine tuning is a rather labor-intensive process, so it is usually done in service centers. But, on some models there are elements for adjusting it; just turn the bolt half a turn to increase the speed of the chainsaw, and the problems will be eliminated. If the jets, injectors, channels and filters are clogged, it is necessary to disassemble and clean the entire carburetor. When oil seals, gaskets, and cuffs wear out, they must be replaced to prevent air leaks.

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If problems arise with the fuel or air filter, it is necessary to replace the fuel pump or clean the air filter.

If the breather is clogged, you need to clean it with a regular needle.

When does the chainsaw start

and immediately stalls, the reason may lie in the incorrect operation of the circuit. To troubleshoot problems, check the presence of oil in the chain lubrication tank, as well as the oil drain tube for ruptures or blockages.

When inspecting the piston group, you should pay attention to the cylinder and, if necessary, replace it or the piston. You can bore the cylinder to fit the dimensions of the new piston. If the piston and cylinder are normal, you should pay attention to defects in the piston rings and the need to replace them.

Among other things, you should monitor the service life of parts indicated in the product passport, which include the drive sprocket, tire, chain, part of the anti-vibration system, and replace them in a timely manner.

If the tool is idle for a long time, it is worth checking the condition of the fuel line. If the tube is cracked, you will have to replace it with a new one.

What should I do if the trimmer stalls when I press the gas?

So, why does the trimmer stall when you press the gas? There may be several reasons for this problem.

1. The carburetor has become out of adjustment after an unsuccessful winter or after using the lawn mower too intensively. A gasoline trimmer operates on an air-fuel mixture prepared by a carburetor. If adjusted incorrectly, this mechanism prepares a lean mixture, which is not capable of providing the engine with sufficiently high speeds. You can tell about a problem with the carburetor by the characteristic vibrations of the lawn mower.
2. You will know that the fuel filter is clogged by the fact that the trimmer starts and stalls. In other words, the flow of fuel is enough to start the lawn mower, but not enough to keep the engine running. It may be possible to solve the problem by loosening the valves on the filter. If not, you should wash the filter in solvents and blow it with compressed air. If after this the problem is not solved, then you should purchase a new fuel filter.
3. If the engine stalls at speeds close to maximum, then there may be a problem with the breather, which regulates the flow of air into the gas tank. When fuel is consumed too quickly, which is typical when you step on the gas, a rarefied pressure forms in the gas tank, which reduces the flow of fuel to the engine.
4. The engine stalls when the throttle is opened. The problem, again, is related to the carburetor, which, due to excess air, prepares a lean air-fuel mixture, which is not capable of ensuring engine operation.

Does your lawn mower stall when it's hot? There is a solution!

The lawn mower stalls when it is hot - this means that there is already a certain amount of fuel in the engine to start the engine, but after 5-10 minutes of operation, it stops working. This behavior of the engine indicates problems with the fuel filter.

The instrument, despite its small dimensions, is a complex technical device. If you study the operating instructions, it turns out that the reasons why the lawn mower does not start are known and can be eliminated. It is necessary to consistently eliminate factors that make it difficult to start the tool. Usually they start with more accessible nodes with easy testing of serviceability.

All the reasons why a lawn mower does not start can be classified according to the specific operation of individual components. The service center classifies faults as follows:

• engine malfunction (piston wear, bearing failure, crankcase crack);
• malfunction of the fuel mixture supply - clogged air filter pores or carburetor malfunction;
• The ignition system does not work;
• mechanical failure - leaking hoses, broken wires under the braid, rupture of tubes.

The user first needs to check whether there is fuel in the tank. Start up according to the instructions, placing the saw on its side. Set the air damper to the “closed” position, pump up the fuel, turn on the ignition and make 3-4 sharp jerks with the starter. If the engine starts, open the air damper. The lawn mower does not start - we repeat the operations with the air damper slightly open.

The brush cutter cannot work for a long time. The gearbox and motor will overheat. You can mow for no more than 15=20 minutes, taking a five-minute break. On a hot afternoon, the operating time is halved. When mowing weeds and sedges, the work time must be reduced.

If the launch fails, we begin to look for the cause of the failure:

• check the quality of the fuel;
• make sure the spark plug is working and the spark plug channel is clean;
• check the cleanliness of the air filter;
• make sure that the fuel filter is not clogged;
• check the cleanliness of the breather;
• clean the exhaust channel.

More complex reasons will be those detected during diagnostics of a malfunction, leading to a major overhaul of the carburetor. Such reasons include clogging of the internal channels of the carburetor, wear of the gasket on it and a violation of the tightness of the internal halls with loss of vacuum. Repairing a lawn mower yourself if it won't start will require patience.

The fuel mixture must be prepared with exact adherence to the proportions of gasoline and oil. In this case, you cannot use another brand of fuel. To prevent dirt from getting in, gasoline should sit in a glass or metal container for 2 days. Do not use plastic containers to store fuel. Measure the oil accurately using a medical syringe without a needle. Use only freshly prepared mixture, without leaving unused fuel in the tank. If the engine is capricious, the lawn mower stalls; when you press the gas, the fuel may be to blame.

The lawn mower does not start when hot - press the gas trigger and sharply pull the cord several times until the engine starts, then lower the trigger. If it won't start, it requires specialized repairs.

Checking the ignition system, if it does not start, is carried out sequentially:

• Clean the removed spark plug from carbon and dirt, dry it, set the gap to 1 mm;
• connect to a high-voltage wire and check for a spark by pulling the starter several times;
• if there is no spark, check the high-voltage wire for integrity;
• replace the spark plug;
• dry the spark plug channel;
• At the same time, the operation of the ignition coil is checked; it is faulty if the working spark plug does not spark.

It is in the event of a malfunction of the ignition coil that the lawn mower does not start hot, stalls, or operates intermittently.

Cleaning or replacing the air and fuel filters will ensure proper flow of ingredients entering the carburetor. The air filter can be washed in soapy water or replaced. If nylon fabric is used, it is washed and the porous felt filler is replaced. The fuel filter is changed carefully, without leaving the suction pipe open. You can determine whether the air filter needs to be replaced if the engine starts with the air cleaner removed. A dry spark plug will tell you if the fuel supply grid needs to be changed if the lawn mower does not start.

Breather, a hole for admitting air into the gas tank. If it becomes clogged, a vacuum is created in the tank and the mixture does not enter the carburetor. The hole can be blown out with air or cleaned with a needle. Clean the exhaust channel and remove the muffler anti-spark mesh.

Chainsaw stalls at high speeds

Content

DIY chainsaw repair

All malfunctions of chainsaws can be divided into two main groups: engine problems with all its components and systems (ignition, fuel supply system, cylinder-piston group, exhaust system) and malfunctions of other components (chain brake, lubrication system, clutch, tire, etc. .).

Engine malfunctions

• the engine does not start;
• starts but stalls;
• works unstably;
• does not develop power, i.e. It runs fine at idle, but stalls under load.

When repairing a chainsaw with your own hands, you must use the method of elimination. inspect alternately all the probable causes of a malfunction, starting with those that take the least time to check and eliminate (see here about the structure and operation of a two-stroke engine).

Ignition system

. Almost all types of engine problems listed above can be caused by ignition system failures. Therefore, when they occur, it makes sense to start troubleshooting with a spark plug. This is all the more justified since the state of the latter can provide useful information about the operation of the fuel system. So, if a problem occurs, you need to unscrew the spark plug and inspect it.

The wire is disconnected and the spark plug is unscrewed with a special wrench.

If the spark plug is dry, this means that the problem is most likely not in the ignition system, but in the fuel mixture . You can wrap the spark plug back and get to work on the fuel system. If the spark plug is heavily splashed with fuel mixture, it means there is an excess of it. This may occur due to carburetor misadjustment or violation of starting rules. The spark plug is wiped and dried, the cylinder is dried by turning off the fuel supply and operating the starter. to ventilate the combustion chamber and remove excess fuel. Then install the spark plug in place and repeat the start.

The presence of a large amount of black carbon also indicates a malfunction in the fuel system.

The ratio between oil and gasoline in the mixture may be incorrect, the carburetor may not be adjusted, or low-quality oil may be used. The spark plug is washed in gasoline, cleaned of carbon deposits with a needle or awl, the electrodes are cleaned with fine sandpaper and replaced.

In all these cases, it would be a good idea to check the gap between the spark plug electrodes. The chainsaw stalls at the chainsaw stalls at idle the engine runs stably at. Depending on its brand, it should be in the range of 0.5-0.65 mm. You also need to check the spark plug seal. If it is worn out or damaged, the tightness of the combustion chamber may not be ensured, which leads to a decrease in compression in the cylinder and problems in engine operation.

Even if, when checking the spark plug, there is good reason to believe that the fault is in the fuel system, you need to check the spark plug for the presence of a spark. At least to be sure that everything is in order. For this:

• put the ignition cable on the spark plug;
• using pliers with insulated handles, apply the thread or nut of the spark plug to the cylinder;
• pull the starter handle and watch. whether there is a spark or not.

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If there is no spark, you just need to replace the spark plug. At high rpm it stalls. Which does not stall at high speeds. On the. If the new spark plug does not have a spark, you need to check the condition of the high-voltage wire for a break and contact with the spark plug.

The reason for the lack of a spark may also be a faulty ignition module or a violation of the gap between it and the flywheel magnetic circuit. It should be 0.2 mm. Violation of the gap becomes especially likely if the saw was previously disassembled and the flywheel and ignition module were removed. The gap is set using a 0.2 mm thick gasket placed between the flywheel boss and the ignition module. A faulty ignition module must be replaced.

Having checked the ignition system in this way and not finding a malfunction, you can move on to the fuel mixture supply system.

Fuel supply system

. The chainsaw stalls when you press the gas and runs at high speeds for 15-20 seconds. If by inspection of the spark plug it is determined that fuel is not entering the cylinder, all possible reasons for this need to be considered. It could be:

• failure of fuel to flow from the tank due to a clogged hole in its lid (breather), while a vacuum is created in the tank, preventing fuel from leaking out;
• contamination of the fuel filter installed in the tank;
• no or insufficient supply of fuel mixture from the carburetor to the cylinder.

To diagnose the first two reasons, it is enough to disconnect the fuel hose from the carburetor and see whether fuel flows out of it or not. If it flows in full stream, the breather and filter do not need to be checked; if it does not flow or flows weakly, we can assume that the cause of the malfunction has been found. The breather is cleaned with a needle. The fuel filter is removed through the filler hole of the empty fuel tank using a wire hook, along with a suction hose, from which the filter is disconnected and cleaned or replaced with a new one. Chainsaw manufacturers recommend changing the fuel filter every 3 months.

Chainsaw stalls when pressing on gas

The video discusses a fairly common malfunction of chainsaws

and 100% carburetor tuning method. The gas mower stalls at high speeds. How did you do it

The chainsaw stalls when you press the gas

The chainsaw stalls

when you press the gas.

The Partner 370
chainsaw to stall at the slightest pressure on the handle.
Insufficient supply of the fuel mixture from the carburetor to the cylinder or a violation of the correct ratio between fuel and air mixed in the carburetor can occur for several reasons: due to a clogged air filter, unadjusted carburetor, clogged channels or filter mesh.

As a rule, repairing chainsaws is not complete without cleaning the air filter, since it gets dirty quite quickly. When this happens, the flow of air into the carburetor is reduced, and the fuel mixture leaving it becomes too rich, which disrupts the normal operation of the engine. You need to carefully remove a dirty filter for cleaning so that dirt does not get into the carburetor. The filter should be cleaned or washed in water with some detergent, dried and installed back.

Carburetor misalignment can be corrected by adjusting it. This is usually done using three screws. maximum and minimum speed and idle speed screw. Adjustment must be carried out in strict accordance with the instructions, failure to comply with which may lead to engine damage. Some saw manufacturers leave only one adjustment screw (idle speed). to prevent unwanted interference by inexperienced users with the operation of the carburetor. For an example of adjusting a chainsaw carburetor , see the article Working with a chainsaw.

If adjusting the carburetor does not help, you need to clean its channels and filter mesh, and at the same time check the integrity of the membrane. Carburetor. one of the most complex devices of a chainsaw, so you need to start disassembling and cleaning it with a full understanding of the responsibility of this operation. If the Stil chainsaw does not maintain speed and stalls at idle, the Calm saw is 180. The chainsaw stalls at high speeds if the tool stalls at high speeds. It consists of many small parts that have the ability to unnoticeably jump out of their places and get lost irretrievably, so that after disassembling this capricious device, you may not be able to reassemble it.

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Below is a diagram of another chainsaw carburetor.

If you do not have experience and self-confidence, it is better to entrust the repair of a chainsaw carburetor to a service center specialist. Sometimes, to properly clean the carburetor, it is necessary to use ultrasonic cleaning.

Muffler

. Often the cause of engine malfunction, especially when the engine runs normally at low speeds and stalls under load, is clogging of the muffler spark arrester with combustion products, which prevents normal exhaust. Repair in this case consists of removing the muffler, disassembling it (if it is dismountable) and wet cleaning it from carbon deposits using detergents. The non-removable muffler is dried with a hairdryer after washing. Remember that carbon deposits contain substances that are carcinogens, and dry cleaning, which could result in their inhalation, is unacceptable. When removing the muffler, plug the engine exhaust hole with a clean rag.

Some of the reasons why the muffler may become clogged. This is the use of a fuel mixture with an excess amount of oil (the amount of oil is more than the manufacturer recommends), and the use of either oil not intended for two-stroke engines or low-quality oil.

Cylinder-piston group

. Malfunctions of the cylinder-piston group are among the most serious. This is wear of the cylinder and piston, scratches and scuffs on their surface, wear or sinking in the grooves of the piston rings, wear of the crankshaft bearings. Most of these malfunctions lead to a drop in cylinder pressure and, as a result, the engine is unable to start, or is unable to produce full power. There are several ways to assess the condition of the cylinder-piston group (CPG).

You can remove the muffler and look through the window that opens, in which part of the side surface of the cylinder is visible. Despite the limitations of the review, it is still possible to obtain a general idea of ​​the state of the CPG in this way.

It is useful to measure the compression in the engine, which is quite informative regarding the condition of the CPG parts. If a breakdown is avoided, the chainsaw will stall at idle. The operation is carried out using a compression gauge installed in the spark plug hole.

The crankshaft is turned using an electric motor (drill) with a flexible shaft or manually with a starter, while monitoring the pressure using a pressure gauge. The latter for a working chainsaw should be no lower than 8-9 atm (0.8-0.9 MPa). As it decreases, engine power also decreases. Don’t forget that the Stihl chainsaw stalls when the carburetor does not respond to saw adjustments. At a pressure of 5 atm, the engine may work, but only at idle.

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The condition of the CPG can only be accurately assessed by completely disassembling the engine. by disconnecting the crankcase from the cylinder and removing the piston. If the latter has burrs, chips or deep scratches, it needs to be replaced. With regard to the cylinder, if the surface is worn out or damaged, it is possible to bore it to the repair size. Low compression may also be caused by wear or coking of the piston ring. The chainsaw stalls when you press the gas from the chainsaw calm stalls when the saw is running. A working ring should be clean of carbon deposits, sit freely in the piston groove and press tightly against the inner surface of the cylinder.

Chain lubrication system

If there is a significant (small is considered normal) oil leakage, you need to check the tightness of connecting the tubes to the pump fittings. They may fall off or crack. Violation of the tightness of the oil line, in addition to drips, can also lead to insufficient lubrication of the chain. The pump begins to suck in air, which affects its performance. Violation of the tightness is eliminated by replacing the tubes or sealing them with sealant.

The most serious failure of the lubrication system is cracks in the oil pump housing. Information on what to do when the chainsaw stalls at high speeds. Two ways: troubleshooting yourself, trusting a professional. In this case, it will have to be replaced.

Chain brake

Replacement of wear parts

If you do not replace wearing parts in a timely manner, their excessive wear will negatively affect the remaining components of the chainsaw. In particular, if the tire and drive sprocket are not changed in time, increased vibration will negatively affect the crankshaft bearings. The maximum working depth of the sprocket teeth should be 0.5 mm. In practice, sprockets are often operated to a wear depth of 1 mm or more. unaware that this leads to increased load on the crankshaft bearings and accelerated failure. When 3-4 chains wear out, it is necessary to change the tire itself; by this time its wear reaches its maximum values.

The chainsaw bar wears especially hard in the area where cutting is done most frequently, usually. this is the underside of the guide bar. Why does the chainsaw not pick up speed and stalls? If the chainsaw is unable to gain speed a minute after starting or stalls when the gas trigger is pressed, it is most likely the carburetor or. To ensure uniform wear, each time the chain is replaced, the bar must be turned 180° relative to the horizontal axis.

When installing a new chain, a new drive sprocket should be installed. Since under normal load the service life of the drive sprocket is twice as long as the service life of the chain, it is advisable to use one sprocket for alternate operation of two chains. Thanks to this, the sprocket and chains wear out almost simultaneously. If a new chain is placed on a worn sprocket, the drive links of the chain will wear out much faster. For cost-effective operation of a chainsaw, always use together: one guide bar, two chain sprockets, four saw chains.

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Carburetor adjustment and tuning

The maximum and minimum engine speeds and smooth idle are controlled by the carburetor. The stable operation of the lawn mower depends on the amount of supplied combustible mixture and air and their ratio. The lawn mower will not start if the carburetor adjustment is incorrect. The order of setting the device for supplying fuel at low speed (L), high speed (H) and idle speed (T) is regulated by the screws of the same name:

1. The chainsaw must run for at least 10 minutes, since the adjustment is carried out while it is hot.
2. Screw H is turned smoothly to maximum speed, then turned ¼ counterclockwise, reducing the speed of rotation of the motor shaft.
3. The idle speed is adjusted with screw T, ensuring that the scythe does not rotate.
4. Screw L is adjusted by first opening the throttle as much as possible, and then smoothly reducing the speed to a stable minimum.

After adjustment, a serviceable one with cleaned filters and a checked ignition should ensure engine operation. If the carburetor malfunctions, after it has been repaired, the feed system will again need to be adjusted before starting the lawn mower.

Rare breakdowns that prevent the operation of a lawn mower can include:

• rewind spring malfunction;
• broken or stuck starter pulley;
• faulty starter assembly.

The most important malfunction, the elimination of which is associated with engine replacement, may be failure of the engine piston group. The cost of repairs will cost approximately 70% of the cost of the product. This video will help you understand the reasons why the lawn mower won’t start:

Proper care of a chainsaw

There are no unnecessary phrases in the operating instructions; everything that is offered is aimed at trouble-free operation of the lawn mower. Cleaning all parts after each work cycle allows for easy removal of unhardened residues and dirt. Only cooled components need to be cleaned. This technique contributes to the quality of air cooling of the engine and gearbox.

To refuel, you must use fuel with the oil recommended in the instructions. If the combustible mixture is left in the fuel tank, the oil will float to the surface and land on the damper during startup, impairing its adjustment. The mixture may form sediment and clog the fuel supply in the carburetor.

When storing equipment for the winter, inspect it, lubricate the gearbox and piston system, wrap the entire saw in an oiled rag and store it in a dry place.

It is impossible, as it is dangerous for the tool and the health of the mower, to use a metal cable instead of a fishing line. It cuts more efficiently, but the load on the gearbox and engine increases. When a piece of wire breaks away, it flies at the speed of a bullet. Effective mowing can lead to rapid wear of the engine piston group. For greater mowing efficiency, it is suggested to use a “star” fishing line profile.

Diagnosis of lawn mowers and elimination of causes - video

While caring for their garden plots, summer residents periodically encounter the problem that the lawn mower does not start. There are many reasons for tool failure. To correctly diagnose the problem, the owner of a useful unit at the dacha needs to know the structure and operating principle of its individual parts.

Since a gasoline trimmer is a complex device, you must carefully study the operating instructions before starting work. Very often they simply ignore her, or get to know her superficially. As a result, when the tool stalls or refuses to start, the question arises: “Why won’t the lawn mower start?” A long seasonal break in work, improper storage and untimely maintenance of the trimmer will cause a lot of trouble for the summer resident to eliminate the causes.

Where to start diagnosing a lawn mower

If the lawn mower does not start or stalls immediately after starting, it is necessary to sequentially check all the main components and assemblies. The verification algorithm is as follows:

• Fuel tank (fuel quality);
• Candle and candle channel;
• Air filter;
• Fuel filter;
• Breather;
• Exhaust channel.

These nodes are most often the source of the main problems, which can be eliminated after a thorough inspection.

Checking the fuel mixture

Before starting the gasoline scythe engine, check the availability and quality of the fuel mixture. Don’t save money, don’t be greedy, and don’t be “clever” in this matter. Repairing or replacing the piston group will cost you too much (sometimes up to 70% of the cost of a new tool). The oil-fuel mixture must be prepared strictly according to the instructions. Calculate its quantity based on real needs. The excess gasoline remaining after work loses its quality over time.

We diagnose the spark plug and spark plug channel

If the quality of the fuel mixture is not in doubt, and the lawn mower stalls when starting, then the cause may be a flooded spark plug. Here, a regular spark plug wrench (surely every motorist has one) and a spare spark plug are suitable for repairs.

• We unscrew the candle and wipe it;
• Dry it thoroughly (do not heat it);
• We drain the excess fuel in the chamber through the spark plug hole and dry it;
• We clean the old candle from carbon deposits using a file or a lady’s nail file;
• We set the gap with a distance of 1 mm (you can check it with any coin);
• We return everything to its place and try to start the trimmer.

You need to dry the canal for at least 30–40 minutes. Otherwise, there is a risk of re-filling a new spark plug.

If the spark plug is working, the socket where it is located is completely dry, and the lawn mower does not want to start, lubricate the threaded connection with gasoline. It should be slightly moist. No matter how wonderful a spark a candle produces, there is simply nothing to light up in a dry chamber.

If the trimmer engine still does not start, a reason such as lack of spark due to poor contact between the spark plugs and the high-voltage wire should be excluded. If the connection is good, but there is still no spark, most likely your ignition unit has failed. Here you won’t be able to do without a specialist, since the part is not repaired, but sold as a single unit.

Diagnostics of lawn mower filters

Another reason why a gas scythe stalls may be the air filter. To eliminate this, try removing the filter and starting the trimmer without it. If it works out, then you will have to change the air filter to a new one, or at least blow out and thoroughly clean the old one.

A gasoline trimmer may not start due to contamination of the fuel filter. This is the next stage of our algorithm. Here we check the condition of the filter element and, if necessary, replace it with a new one. When replacing, try not to leave the suction pipe completely without a filter; this is prohibited by any operating instructions. Haste can result in repair of the engine piston group.

Breather and exhaust channel

Often, “delicate” branded models of lawn mowers do not start and stall due to contamination of the breather. The main function of this element is to equalize the pressure in the gas tank. When this unit becomes clogged, a vacuum is created in the tank, preventing the supply of fuel. The problem can be resolved by cleaning the breather. You can use a regular needle for cleaning.

The normal operation of scythes with internal combustion engines may be disrupted due to dirt getting into the exhaust channel or clogging of the muffler mesh. This problem occurs on older generation models. The issue can be resolved by traditional cleaning and removal of the anti-spark mesh.

More complex reasons for lawn mower failure

If the step-by-step troubleshooting algorithm does not produce results, and your scythe still does not start or stalls, it is worth inspecting the carburetor and the engine itself. A clogged carburetor can be one of the reasons for unstable operation of the tool. There are three main problems here:

• Clogged channels or jets. All this is cleaned with special washes or blown with a powerful jet of compressed air from a compressor. Do not use needles or wire, as the bores may be damaged;
• Worn carburetor gasket. The solution is to replace the failed gasket;
• Violation of tightness. To check this indicator, you can use a regular household tonometer, replacing the pressure gauge with a suitable one. Keep an eye on the readings: if they do not change, everything is fine, but if the pressure starts to drop, it means that some part of the carburetor is faulty. You'll have to find it and replace it with a new one.

If everything is in order with the carburetor, then the gasoline trimmer may not start due to wear on the piston group. If chips, scratches or burrs are found on the piston or cylinder, they should be replaced. Piston rings must be checked. A slight luffing of the piston when the connecting rod swings indicates that it is time to change the rings. This procedure is best left to the service center specialists.

Rules for operating and storing lawn mowers

In order for the lawn mower to start well in the future, you need to provide it with good storage and operating conditions:

• During operation, carefully monitor the cooling system, carefully and promptly clean the channels in the housing, as well as the starter fins;
• if necessary, use solvents, kerosene and other detergents for cleaning;
• Do not clean the tool “hot” - let it cool down;
• strictly follow the operating instructions, otherwise you may overheat the engine;
• if you do not plan to use the lawn mower in the next month, you need to drain the fuel mixture from it, because over time it breaks down into heavy fractions that will definitely clog the carburetor channels;
• After draining the fuel, let the trimmer idle until it stalls, this will help completely remove the remaining working mixture.

Before winter storage, take the following steps:

• completely disassemble the braid, rinse and clean all the parts you can;
• inspect the parts for damage, if necessary, eliminate distortions, tears, bends and any other defects;
• pour a sufficient amount of oil into the gearbox and clean the air filter;
• you can partially disassemble the motor, wash, blow and lubricate all moving parts;
• in order to lubricate the piston, you need to unscrew the spark plug, use the starter to raise the piston to the dead center, pour a little oil into the spark plug hole and turn the crankshaft a couple of times;
• If you store the lawn mower outside the house, wrap the engine with oily rags.

Remember, careful adherence to the rules will allow you to forget that it is difficult to start a lawn mower for several seasons.

Stihl Ms 180 Stalls at Idle

Any tool can break, and the Stihl MS 180 chainsaw is no exception. Now let’s try to understand questions such as: why does the chainsaw stall when the speed increases, also at full idle. Let's look at options for diagnosing and eliminating defects associated with this behavior of the Shtil 180 chainsaw.

Let's say the chainsaw works normally at idle, but when you press the gas sharply, it stalls. What is the reason you will like? It’s immediately clear that the problem is not the ignition (lack of spark), because if the ignition was faulty and there was no spark, the tool simply would not start. This means the fuel system remains.

There are enough defects in the fuel complex of accounting programs, and in order to determine a clear reason why the Shtil 180 chainsaw stalls when you press the gas, you need to carry out a full diagnosis of it. We advise you to read about the most common malfunctions of the Shtil 180 chainsaw and the elimination of these defects.

The first thing you need to check is the fuel filter.

Sometimes, a filter clogged with dirt is unable to pass through the fuel mixture in sufficient quantities. Accordingly, a lack of fuel appears in the system, which leads to the fact that when you press the gas of the chainsaw, the fuel burns out, and the new one does not yet have time to arrive and, as a result, the Shtil chainsaw stalls. Also, if the fuel filter is clogged, there may be a noticeable drop in the power of the chainsaw at high speeds, alas, this is with minor contamination.

On the Internet, you will find information that the Shtil 180 chainsaw may stall due to severe contamination of the air filter. I would like to refute this incorrect information and say that the Shtil MC 180 carburetor is equipped with a compensator, which is designed and installed to take in the air necessary for the normal operation of the Shtil 180 chainsaw, bypassing the dirty air filter. This power with a clogged air filter will drop slightly, alas, it will definitely not stall. The power may also drop due to piston wear; here the Stihl MS 180 piston chainsaw will need to be repaired.

Stihl chainsaw. Repair. Idle speed adjustment. In artisanal conditions. Traders are silent about this fact.

READ Replacing Piston Rings on a Stihl Chainsaw

One of the reasons why a chainsaw does not develop speed when you press the gas, but instead stalls, is a malfunction of the carburetor. Let’s say the Shtil 180 saw worked properly, but at the end it was installed for a long time and was not even used. After starting it, it works fine at idle, but when you press the gas it can stall. Why does it stall? The reason is a stuck carburetor valve nozzle. This is not 100%, but the possibility of such a malfunction is extremely high. We recommend reading the article about the design and repair of the Shtil 180 carburetor.

If you set a goal to check the nozzle, you need to remove the carburetor and disassemble it. To remove, you need to unscrew the two nuts securing the air filter and the carburetor, after completion, remove the air filter and the engine control lever, while disconnecting the air damper control rod from the carburetor. Next, you need to slightly pull the carburetor towards you only and disconnect the fuel supply hose.

It is necessary to very carefully remove the fuel hose, and prepare a plug here in advance, since with its use fuel should come out.

Having removed the carburetor, it must be blown out and cleaned of dirt, only after which the carburetor must be untwisted.

You need to unscrew the cover of the main chamber of the carburetor; this is the one on which the compensator is installed on top. Next, use an 8 mm bolt and a length of more than 50 mm. We knock out the valve.

You need to knock out the valve by placing the carburetor on a wooden stand, this will protect it from damage to the body.

When the nozzle is removed, you can blow it out using a compressor. The valve must allow air to flow exclusively in one direction; if the valve can be freely blown in both directions, it means it is faulty and needs to be replaced with a new one. If the valve has been repaired, you must reassemble the chainsaw in the reverse order of disassembly.

To see clearly how a carburetor is repaired, or more precisely, how to correctly knock out the injector valve from the carburetor body, of course, watch the video.

Another common reason why a saw may stall when the speed increases is air leaking into the carburetor. You can check this only with a special tool, but it is worth seeing that if preventative work on the carburetor has not been carried out for a long period, then you can install a new set of gaskets in the carburetor. Sometimes this helps solve the problem of its depressurization.

READ How to Prepare a Fuel Mixture for a Stihl Trimmer

When disassembling the carburetor to change the gaskets, you need to closely examine its needle valve, press on the rocker arm and check its lifting. If, especially if the Stihl chainsaw stood for a long period with fuel in the carburetor, the needle may burn to the carburetor body and not do its intended purpose. Simply put, the needle valve will not allow the fuel mixture to pass through. Under such circumstances, the saw does not work.

The first and most common cause of this malfunction is incorrect carburetor adjustment. You can adjust the idle speed yourself; for this purpose you need to have a Stihl adjusting screwdriver, which is supplied with the unit. The adjustment hole is located on the right side of the Shtil 180 saw on the handle and is marked with the signs “-” and “”.

If the Stihl chainsaw does not maintain speed and stalls at idle, there is actually a 90% certainty that it has a malfunction in the fuel pump operating system, usually this is air leaking into the crankcase through the pan gasket, in other words, much more often, through the crankshaft oil seals shaft The air intake reduces or completely stops the impulse, which is supplied through special channels to the fuel pump of the chainsaw. Upon completion of this, the Stihl 180 chainsaw does not receive the required amount of fuel and stalls at idle.

Conduct diagnostics, of course, using a special device called a vacuum gauge.

The second method to check the performance of the oil seals is to pour gasoline into the engine crankcase and see if the oil seals allow gasoline to pass through, which means they are providing normal pressure in the crankcase, which will make idling impossible. And when operating at high speeds, with leaky oil seals, it is possible for the crankshaft bearings to jam.

The method for checking the crankcase and seals Shtil 180 for tightness is as follows:

1. The top cover is removed.
2. The air filter housing and carburetor are dismantled.
3. The chainsaw handle is removed.
4. The starter spins up and retracts.
5. The side cover and drive sprocket are removed from the side opposite the starter.
6. A piston stopper is installed in the spark plug hole or a string from an old starter with knots tied to it is stuffed into the cylinder.
7. The flywheel and clutch are unscrewed, after which the parts are removed. It is worth knowing that the chainsaw clutch has a left-hand thread and unscrews clockwise.
8. The oil pump drive gear is removed.

READ Disassembling the Stihl 180 Chainsaw Part 2

Having disassembled the Stihl MS 180 chainsaw, you can notice the oil seals, after which you need to fill the crankcase with gasoline and check for leaks. Fill the crankcase, of course, through the fuel window in the cylinder; for this purpose you need to raise the piston very high. If leaks are detected, you need to replace the defective seals or re-seal the pan. There is an option to assemble Shtil 180 by following the reverse sequence of the method.

We often hear the question why a chainsaw stalls at full speed. You will like more than one circumstance. That's all, you need to take into account exactly how the saw stalled. Let’s say the tool was working normally and suddenly, for no apparent reason, it suddenly stalled and yet the starter does not turn over. Under these circumstances, of course, be 100% sure that the chainsaw is jammed and it is necessary to begin serious repairs.

What to do if the chainsaw does not idle?

Another situation is when the Shtil 180 chainsaw was working normally, then gradually over a short period of time it lost power and stalled, at the same time the cylinder overheated. Then, most likely the reason is air leakage under the rubber pipe connecting the carburetor to the cylinder or its rupture. The mixture became lean, resulting in overheating. You can remove the cause by changing the pipe.

If the Shtil MC 180 chainsaw stalls at idle, does not gain power when you press the gas, or even stalls at full speed, you need to diagnose the fuel system (software) and inspect the crankcase for tightness. There is an option to do this without the help of others, but you need to have certain abilities. If you are familiar with push-pull saws, it is better to turn to specialists, because this technique is quite capricious and any mistakes are expensive.

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