Chainsaw Stalls When Gas Is Applied

The main causes of chainsaw breakdown

Although the chainsaw is an uncomplicated device, from time to time there are malfunctions in its operation, which can only be eliminated by disassembly. The following malfunctions can be cited as examples:

  • The chainsaw is gaining momentum;
  • The chainsaw stops functioning in the cut;
  • The chainsaw starts and stalls;
  • The chainsaw loses its power;
  • The chainsaw stalls when pressed.

Most often, malfunctions are associated with interruptions in the operation of the engine, as well as with malfunctions of second systems and components. Proper handling of this technique is essential. When all the rules of use are followed, problems with a high probability lie in the Most obvious ones. When looking for the causes of problems, it is advisable to start by checking the simplest part of the chain saw and finish the most difficult.

Poor quality fuel mixture

Gasoline must be poured into the equipment in strict accordance with the manufacturer’s recommendations. Unfortunately, many people ignore this advice and use what is “at hand”. This solution leads to a decrease in thrust, detonation and the appearance of carbon deposits. As a result, the quality of ICE operation decreases, the saw ceases to cope with its tasks, and stalls under high load. Fuel must be used up completely, if the time interval between sawing operations is long enough, it must be drained. Low octane gasoline is not recommended. But checking the quality of the gasoline-oil mixture is rather a recommendation to prevent breakdowns. If the main reason for the problems is that a poor-quality mixture has already been used, one gasoline change cannot be dispensed with.

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What to do if the chainsaw stalls when you press the gas

One of the most common questions regarding the operation of this device: why does the chainsaw stall when you press the gas and what should be done to solve this problem? In such a situation, you need to do the following:

  • Check the fuel filter;
  • Inspect the fuel hoses for leaks;
  • Check the muffler;
  • Try to increase the speed a little;
  • Check the condition of the rubber seals on the crankshaft.

The chainsaw starts and stalls. the reason

If the chainsaw starts and stalls at the first attempt to do the job, then the reason may be problems with the chain brake or its jamming due to lack of lubrication. In this case, the oil level is measured. If the amount of lubricant is sufficient, then the reason may lie in the tube that leads it to the lubricating mechanism.

Another reason may be carburetor breakdown. If he only needs adjustment, it can be done independently in accordance with the annotation. If the carburetor needs cleaning or repair, then you cannot do without the help of professionals.

Another possible cause of this malfunction is a low fuel level in the tank. In this case, the chain saw stalls when tilted, since the remaining fuel mixture ends up in the part of the tank opposite to the place where the Suction pipe is located.

Why does a chainsaw stall under load

Sometimes the chainsaw is unable to function properly under load. This is most often caused by improper adjustment or leaking carburetor. In addition, a prerequisite for this problem may be air leaks through the carburetor gasket or crankshaft oil seals. A tool that is unable to function under load also cannot maintain idle speed with confidence.

Diagnostics begins with checking the carburetor and crankcase for leaks. If air leaks through the crankshaft oil seals, they must be replaced. If air leakage into the carburetor is detected, the installation of a repair kit of gaskets is required to solve the problem.

If these actions did not lead to the desired result and the crankcase with the carburetor is sealed, then you need to adjust the carburetor.

If a Husqvarna chainsaw stalls under load, then for any deviations in the functioning of the engine, you should first of all check the impulse hose, since this is the most common prerequisite for the breakdown of chainsaws of this brand.

The chainsaw stalls when you press the gas: why and what to do?

In any technique in which an internal combustion engine running on gasoline is used as a power unit, sooner or later problems arise in operation. There can be many reasons for this: from low-quality fuel to breakdowns of “tired” parts. And today we will talk about what to do if the chainsaw stalls.

Check filters

In the event that the saw does NOT receive enough air or fuel, naturally, it will stall when trying to increase the speed or even just at idle. Filter contamination is checked visually. Filters need to be changed if dirt problems are suspected.

Chainsaw Stalls When Gas Is Applied

Checking the main systems of the chainsaw

If the chainsaw refuses to work properly, you need to make sure that all the conditions required for its normal operation are provided:

Then it is necessary to sequentially check the functioning of all its elements. First you need to check the fuel tank. If the cause is not volume and quality of fuel, then spark plugs may be the likely cause of the malfunction. The spark plug gap should NOT exceed 0.5 millimeters. If it is too small, it means that carbon deposits have been deposited on the candles. In this case, remove the candles, clean them, then reinstall and try to start the chainsaw. In addition, it is advisable from time to time to completely replace the candles with new ones, even if they are in good condition.

Then you need to check the condition of the fuel filter and carburetor. Self-cleaning of the fuel filter is a simple task, but it is best to entrust the repair of the carburetor to specialists.

Repair of the PARTNER 350 chainsaw “Part 1”. Why does a chainsaw stall under load

Sometimes the chainsaw is unable to function properly under load. This is most often caused by improper adjustment or leaking carburetor. In addition, a prerequisite for this problem may be air leaks through the carburetor gasket or crankshaft oil seals. A tool that is unable to function under load also cannot maintain idle speed with confidence.

Diagnostics begins with checking the carburetor and crankcase for leaks. If air leaks through the crankshaft oil seals, they must be replaced. If air leakage into the carburetor is detected, the installation of a repair kit of gaskets is required to solve the problem.

If these actions did not lead to the desired result and the crankcase with the carburetor is sealed, then you need to adjust the carburetor.

If a Husqvarna chainsaw stalls under load, then for any deviations in the functioning of the engine, you should first of all check the impulse hose, since this is the most common prerequisite for the breakdown of chainsaws of this brand.

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The main causes of chainsaw breakdown

Although the chainsaw is an uncomplicated device, from time to time there are malfunctions in its operation, which can only be eliminated by disassembly. The following malfunctions can be cited as examples:

  • The chainsaw is gaining momentum;
  • The chainsaw stops functioning in the cut;
  • The chainsaw starts and stalls;
  • The chainsaw loses its power;
  • The chainsaw stalls when pressed.

Most often, malfunctions are associated with interruptions in the operation of the engine, as well as with malfunctions of second systems and components. Proper handling of this technique is essential. When all the rules of use are followed, problems with a high probability lie in the Most obvious ones. When looking for the causes of problems, it is advisable to start by checking the simplest part of the chain saw and finish the most difficult.

What to do if the chainsaw stalls when you press the gas

One of the most common questions regarding the operation of this device: why does the chainsaw stall when you press the gas and what should be done to solve this problem? In such a situation, you need to do the following:

  • Check the fuel filter;
  • Inspect the fuel hoses for leaks;
  • Check the muffler;
  • Try to increase the speed a little;
  • Check the condition of the rubber seals on the crankshaft.

Why the chainsaw picks up speed and stalls

If the saw cannot pick up speed or stalls when you press the gas, then most likely this is NOT caused by the tightness of the carburetor or engine crankcase. This malfunction is eliminated by checking for leaks and adjusting the carburetor.

In addition, this malfunction may be 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 is not supplied to the engine, as a result of which it cannot gain speed or stalls. If you stop the chainsaws, open and close the fuel tank and turn it on again, it will work normally for about five minutes, and then it will stop picking up speed again or stall.

Another possible prerequisite that the saw is NOT able to pick up speed may be excess carbon deposits in the muffler, making it difficult for exhaust gases to escape, which reduces engine power and rpm.

Checking the main systems of the chainsaw

If the chainsaw refuses to work properly, you need to make sure that all the conditions required for its normal operation are provided:

Then it is necessary to sequentially check the functioning of all its elements. First you need to check the fuel tank. If the cause is not volume and quality of fuel, then spark plugs may be the likely cause of the malfunction. The spark plug gap should NOT exceed 0.5 millimeters. If it is too small, it means that carbon deposits have been deposited on the candles. In this case, remove the candles, clean them, then reinstall and try to start the chainsaw. In addition, it is advisable from time to time to completely replace the candles with new ones, even if they are in good condition.

Then you need to check the condition of the fuel filter and carburetor. Self-cleaning of the fuel filter is a simple task, but it is best to entrust the repair of the carburetor to specialists.

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Malfunction of the cylinder-piston group

Piston scuffing can result in the RPM problem under consideration. Seizures can usually be found on the muffler side. As a rule, this breakdown is solved by replacing the CPG, the cost of which can be comparable to the price of the saw itself.

The chainsaw stalls when you press the gas: why and what to do?

In any technique in which an internal combustion engine running on gasoline is used as a power unit, sooner or later problems arise in operation. There can be many reasons for this: from low-quality fuel to breakdowns of “tired” parts. And today we will talk about what to do if the chainsaw stalls.

Fuel filter dirty

If the option with an air filter did not suit you, then we try to change the fuel one. It is located in the gas tank and is attached to the hose, through which fuel is taken from the tank.

This hose must be gently pryed off with something and removed from the gas tank its edge, on which the filter is fixed. Here is an option with work without a filter, as in the case of an air filter.It is better not to use it, since you cannot know for sure if there are any unnecessary impurities in the fuel.

Fuel filter

Therefore, we simply change the fuel filter to a new one and try to work. If everything is fine, then congratulations. you found the reason.

Low oil in the fuel mixture

Let’s look at the most unpleasant case first. Why? Because before manipulating the filters, it is better to make sure that your oil and gasoline are mixed in the correct ratio.

Here, however, it is worth noting that if your saw has already been turned on many times (for example, ten times), but it continues to start, and then stalls again with increasing speed, then everything is apparently in order with the fuel. Otherwise, she would have simply stopped starting altogether.

But still, I recommend that you immediately dispel the slightest doubts about the quality of the fuel, as soon as your saw stalled when you accelerate for the first time. Because, if the reason is in the fuel, then, as mentioned above, you can get expensive repairs. Otherwise, you can still do it. To dispel doubts is to drain the old fuel from the tank and fill in with freshly prepared fuel, in which oil and gasoline are mixed in the correct proportion.

The correct ratio is best seen in the instructions for the saw. If you have lost it, then we look at the ratio on the oil package. It is usually 1:50 or 1:40. If the oil is used “non-native” (well, for example, for Stihl chainsaws, Stihl will also be a little “native”), then I recommend using a ratio of 1:40, even if the oil packaging says 1:50.

For accurate dosage, I myself personally use a medical syringe and a measuring container in which one liter of gasoline can be clearly measured. I pour a liter of gasoline into a container, draw 25 (at 1:40) or 20 (at 1:50) cubes of oil into the syringe and add it to the gasoline.

After preparing a new mixture, Drain the previous mixture from the tank, in which we are unsure, and fill in the fresh one we just Prepared.

Now that you have done everything to dispel any doubts about the quality of the fuel, we proceed to further actions.

As I wrote above, with a lack of oil on the piston and cylinder walls, scuffs can form. and they are almost always formed. If you are lucky and no seizure appears, then with the new fuel mixture, cooked in the correct ratio, the chainsaw should start working normally.

If seizures appear, then the saw can start several more times and stall, after which it will stop starting altogether. In such a situation, I sympathize with you, since, most likely, now you will need to replace the piston group, which will be very expensive.

If the saw, as before, starts and stalls at high speeds, then we manipulate the filters.

Why does the chainsaw stall when you press the gas?

Hello! If you find yourself on this page, then, most likely, your chainsaw stalls when you press the gas, and you want to know why this is happening and what to do about it. Well, I will try to help you with this problem by examining the most common causes of such a misfortune, as well as methods of eliminating them.

To begin with, I will immediately write for novice users that many chainsaws require warming up the engine idling for about one minute before work. While the engine is NOT WARMING up, the saw may stall when gas is added.

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So, if a heated chainsaw can idle, but stalls under load, then this means that:

  • Improperly tuned or clogged carburetor. the most common case;
  • It does not have enough air, the consumption of which increases sharply with increasing speed. this means that the air filter is dirty (a rare case, since the filter becomes clogged gradually, so the user first notices a loss of power);
  • It does not have enough fuel, the consumption of which also increases with increasing speed. this means that the fuel filter is dirty (also an infrequent case)
  • Well, and the most unpleasant case, if there is excessive friction between the piston and the cylinder wall, associated with a lack of oil in the fuel mixture. after such operation of the chainsaw, you will most likely fly into the repair of the piston group, since seizures form on the piston and cylinder walls that prevent saw operation.

Let’s analyze these cases separately.

Air filter dirty

It’s easy to make sure the air filter is dirty. You just need to remove it and start the chainsaw without it. if the saw works fine, then it’s in it and it just needs to be changed or washed, depending on its type. Do not be afraid that the chainsaw will work for a while without dust protection. if there is a dust cloud around you, then everything is in order.

So, remove the air filter. To do this, you need to remove the cover from the rear upper part of the chainsaw, which is fastened either with screws, or just some kind of lock, which you just need to return or snap off.

If the saw is working normally when the filter is removed after starting up, then it is dirty.

The air filter can be either felt or nylon. The first resembles cotton wool or synthetic winterizer, and the second looks like a fine mesh of nylon threads stretched over a plastic case. Felt needs to be changed to a new one, but nylon can be simply washed in soapy water, Dry and put in place.

Nylon filter

Felt filter

Well, then we calmly use the chainsaw.

Cleaning and adjusting the carburetor

If all of the above did not help, then, most likely, adjustment or cleaning of the carburetor is required. It is not recommended to do these procedures on your own, since most often such attempts still end with a trip to the service. So it’s better to go there right away and DO NOT disassemble anything on your own. But if you still want to dig deeper yourself, then it’s best to look. Which shows how specialists do it:

I will end on this. Thanks for attention! Read more articles on this site! Until next time!

When you press the gas, the chainsaw starts to stall. causes and solutions to the problem

The chainsaw is a highly efficient tool for working with wood. However, the high-speed motor of this tool can be used for a variety of other tasks, which is achieved by means of special attachments. Sometimes a malfunction such as the chainsaw stalls when you press the gas, which can be triggered by some factors. In order not to have to disassemble the tool completely, we will consider all sorts of reasons for this problem with a detailed description of how to fix them.

Why else can a chainsaw stall when you press the gas

If, after adjusting the carburetor of the chainsaw, the problem remains, then a number of other factors should be checked. There are enough of such factors, and their verification must be carried out sequentially, moving from the easier to the more complex. It is in this order that we will consider all the reasons why the chainsaw develops high speeds, and at the same time stalls. It should be noted that in this case, the tool starts up and works properly at idle speed.

  • Check the chain tension. if the cutting element is tightened too much, this will put a heavy load on the engine. In this case, it will be difficult for a high-speed engine to spin the chain, as a result of which we get its termination of work. The problem can be corrected if the chain tension is correctly adjusted. The chain should rotate easily by hand, but at the same time keep in mind that on XX it should not move. If the chain moves at idle speed, then you need to adjust the upper screw XX
  • The quality of the fuel mixture and the correctness of its preparation. It is recommended to use AI-92 gasoline for the chainsaw. It is mixed with two-stroke oil in appropriate proportions. Although the mixing ratio is indicated on the label of the container with oil, you need to use the data specified by the tool manufacturer. The optimal value for the mixture of gasoline and oil is 40/1, that is, 25 ml of oil must be added to 1 liter of gasoline. The proportion means that for 40 liters of gasoline you need to add 1 liter of oil. If you do not adhere to the manufacturer’s recommendations, then in total this negatively affects the operation of the carburetor and the health of the CPG
  • Muffler. Very often sawfillers DO NOT pay due attention to the tool’s exhaust system. If the muffler is clogged, and this necessarily happens over time, this negatively affects the operation of the motor. Silencers on chainsaws are collapsible and non-collapsible. In non-separable devices, the connections are flared, so in case of clogging, you need to either replace the part, or flare for cleaning. A clogged muffler affects the operation of the tool, so do not wait until the chainsaw stops starting
  • Air leaks. parts and mechanisms of the chainsaw are connected to the cylinder through gaskets. In total, such connections are sealed, which is important for the operation of the internal combustion engine. Tightening the bolts and nuts, which fixes the carburetor and muffler, will help to verify such a malfunction. Leakage can also occur due to deterioration of the gaskets, which should be replaced on the tool
  • Fuel and air filters are elements responsible for filtering the air and the fuel mixture. If the air filter is clogged, as the throttle opening increases, there will not be enough air entering the carburetor, causing the spark plug to flood. As a result, the engine will stall when trying to develop maximum speed. If the fuel filter is defective, the required amount of fuel will NOT enter the carburetor. Its lack leads to the fact that the tool cannot develop momentum, and immediately starts to stall
  • The presence of a fuel filter. This element can not only get clogged, but also disconnect from the fuel hose. In total, it will turn out that dirt will enter the carburetor, which will very quickly disable the mechanism
  • A breather is a hole through which air enters the chainsaw tank, excluding the creation of a vacuum inside a sealed container. The breather is located on the gas tank cap or can be built into the tank wall. The principle of its operation is such that as the gasoline in the tank is consumed, the tank is filled with air. If the breather is defective, a vacuum is created in the tank, which prevents fuel from being pumped into the carburetor. The breather allows air to pass through in one direction, and eliminates the possibility of fuel leakage from the tank. You can repair the part with a thin needle that punches a hole
  • CPG malfunction. the chainsaw does not pick up speed even if the cylinder-piston group is worn out. To identify this reason, there is a need to disassemble the engine in order to look inside. A compressor should be used to check the amount of compression. The normal value should be at least 12 atmospheres, and if the value is lower, then the CPG must be replaced
  • Ignition System. If the engine starts, it is unlikely that the problem is an electrical malfunction. However, it will be superfluous to Unscrew the spark plug and make a visual inspection. The presence of black carbon indicates the need to check the ignition. The first step is to check the gap between the ignition module and the flywheel, the value of which should be 0.25 mm. The integrity of the armored wire is also checked, and if it is damaged, then it must be replaced along with the module. Spark plugs have an appropriate resource, so they need to be changed, we preset a gap of 0.5-0.7 mm (indicated in the technical description for each tool model)
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If checking all the reasons does not allow a positive result to be achieved, then the carburetor of the chainsaw should be removed and cleaned.

The chainsaw stalls at high speeds. simple carburetor repair

The carburetor of the instrument is exactly the mechanism that most owners are afraid to disassemble on their own. The reason is that this mechanism consists of many small parts, the location of which must be remembered when carrying out dismantling work. However, not everything is as scary and difficult as it might seem. To understand how the carburetor has to do with the problem of stopping the engine when the engine speed increases, you need to find out its principle of operation, described on the website.

The chainsaw stalls when you press the gas due to the carburetor, if:

  • Membrane damage
  • Clogged filter element (mesh in the carburetor). Owners of tools that do not have a fuel filter or are simply disconnected from the fuel hose may encounter this malfunction.
  • Needle sticking, which may be due to the introduction of an outdated fuel mixture
  • Clogged nozzles or clogged carburetor
  • Bending of the connecting part connecting the membrane with the needle for supplying fuel to the fuel chamber of the carburetor. This part is also called a foot, since under the influence of the membrane on it, the needle moves and the channel opens. During operation, this foot can bend (work out) or break (the engine will NOT start if it breaks). If the foot is bent, then it can be unbent, but this does not guarantee that the problem will recur soon, therefore it is recommended to replace the part

It is recommended to clean and wash the chainsaw carburetor, and replace faulty parts and elements. After that, you can put it back, and not forgetting to also replace (if worn) the gasket between the carburetor and the adapter.

Adjusting the carburetor when the engine stalls while accelerating

If the check showed that the fuel supply system, muffler and spark plug are in good working order, then you need to look for a breakdown in other places. Initially Do not rush to disassemble the cylinder-piston group or change the carburetor. It is recommended to start repairs by adjusting the carburetor. For this, all chainsaws have special adjusting screws. They are designed to adjust the idle speed, as well as adjust the fuel supply at low and high speeds. A detailed description of how to adjust the carburetor of a chainsaw is described on the website.

Today we will consider the features of tuning the carburetor at maximum speed. You can make sure that the chainsaw develops full power using a tachometer. If there is a device, then you can make sure that the engine does NOT develop maximum speed by ear. We are interested in the screw on the carburetor. Which is designed to tune high rpm. It is usually denoted by the Latin letter “H”, which is abbreviated from the word “High” (high or large).

To adjust the high speed of the chainsaw, you will need to perform the following manipulations:

  • Turn screw H clockwise until it stops.
  • Next, you need to weaken it by 1.25-1.5 turns
  • Run the tool and test the speed performance

It is recommended to adjust the tachometer, but if it is not there, then you can check the maximum speed when the tool is working under load.

After the trivial setting of the carburetor, you can fix the problem with the termination of the engine when the speed rises. It should be noted that it is necessary to adjust the carburetor of the chainsaw regularly, depending on the frequency of operation of the tool. It is not difficult to do this yourself, but you can achieve accurate tuning in one case. if you use a tachometer.

Where to look for the reason or where to start checking

All chainsaws have the same design and work according to the same principle. You can get acquainted with the device of the chainsaw in this material. It does not matter which brand of tool. Stihl, Husqvarna, ECHO, Champion, Partner, Sturm and others. A malfunction that manifests itself in the form when the chainsaw stalls when the gas is pressed can occur equally both on expensive and high-quality tools and on budget Chinese devices. If a problem occurs, then it needs to be solved.

A chainsaw is a system of mechanisms consisting of parts. Any part in the mechanism can malfunction, which will lead to partial or complete failure of the tool. If the engine of the tool starts, it does NOT mean that the chainsaw is completely functional. When the engine stops working when the engine speed increases, then there are Corresponding reasons. With this malfunction, you must first pay attention to a number of the following tool mechanisms:

  • Gas tank. make sure there is fuel. If there is sufficient fuel, you should also check the serviceability of the fuel filter, the presence of a connection between the supply hose and the carburetor, and also make sure that the breather is working

These are the main parts and mechanisms that should be checked first if a malfunction occurs when the chainsaw stalls when the accelerator is pressed. There are other reasons why the chainsaw engine stalls when the gas trigger is pulled. What else can contribute to the occurrence of this malfunction, as well as the features of eliminating breakdowns, We will find out further.

Why does a chainsaw stall when you press the accelerator. Summing up

When making an upgrade for the reasons why the saw stalls after you press the gas, you need to take stock of all sorts of reasons and their elimination. The reasons can be conditionally divided into two parts. simple and complex. You need to start troubleshooting with simple reasons, and end with more complex ones.

Definitely, you need to start checking from the tank, and not from the carburetor, but from the gas tank. And make sure that you use a properly prepared mixture. Next, you need to check the serviceability of the muffler and the presence of carbon deposits on the spark plug. After that, you will already have an idea of ​​in which part of the tool you need to look for a breakdown. Perhaps a breakdown is. What you need will simply increase the maximum speed, for which the carburetor is tuned. If this does not solve the problem, then you should check the air filter and clean it.

Pay special attention to the carburetor, after cleaning and possibly repairing which the chainsaw should work like new. If even after this the problem remains, then DO NOT be too lazy to check the compression value. Perhaps the engine has a strong performance and needs to be replaced.

This completes the upgrade to restore the tool’s performance, and it is worth noting one more point, such as the use of fuel that has been stored for a long time. Many people dilute gasoline with oil, and store the mixture for months, and sometimes for six months. This cannot be done in any way, since the mixture has the properties of aging, and therefore, after its preparation, it must be used within 1-2 weeks. If you do not follow this recommendation, then you will need to frequently change Not only the fuel filters, but also cleans the carburetor, but the worst thing is that it contributes to accelerated wear of the CPG.