Husqvarna chainsaw stalls under load

Checking the main systems of the chainsaw

If the chainsaw refuses to work properly, you must 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 problem. The gap at the candle 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.

Why the chainsaw doesn’t pick up speed and stalls

If the chainsaw is not able to pick up speed a minute after starting or stalls when the gas trigger is pressed, most likely the carburetor or crankcase is leaking. As in the previous case, the problem can be solved by checking for leaks and adjusting the carburetor.

If the chainsaw does not pick up speed and stalls after it has been running normally for about 5 minutes, the reason may be a defective fuel tank breather. The vacuum created in the fuel tank during tool operation prevents the engine from receiving the necessary amount of fuel for its normal operation, and for this reason it will be unable to gain speed or stall. At the same time, if you stop the tool, open and close the fuel tank cap and start the chainsaw again, the tool will work normally again for about five minutes, after which it will stop gaining speed or stall.

The reason that the chainsaw does not pick up speed can also be excessive carbon deposits in the muffler, which makes it difficult to exhaust exhaust gases, thereby reducing the power and engine speed.

husqvarna, chainsaw, stalls, load

If you want to check the tightness of the crankcase, but there is no special tool, you can use the following test procedure.

Why does a chainsaw stall when heated

It often happens that the chainsaw starts up on a cold one, but stalls during the heating process. This behavior of the tool can be caused by the following reasons:

  • The carburetor is incorrectly set. You can identify this problem by how the device is started up on a cold one. If it is performed without closing the air damper, and the engine starts without a preliminary flash, this means that after heating the engine, the fuel fills the candle. The solution to this problem is to adjust the carburetor. Details on carburetor adjustment
  • Coil (ignition module) malfunction. This problem can be identified by sequentially checking the spark, first on a cold, and then on a hot motor. If there is no spark on a hot engine, then you need to replace the ignition coil.
  • Defective spark plug. In this situation, as in the case of a malfunction of the ignition module, the spark disappears when the engine heats up. It is necessary to replace the spark plug with a new one, and if this does not lead to a solution to the problem, then the ignition module and the distance between it and the flywheel should be checked.

Why does the chainsaw start and immediately stall

The chainsaw starts up and immediately stalls, the reason for this behavior may be hidden in the carburetor. A malfunctioning fuel pump or malfunctioning of the main fuel jet can cause this saw to behave like this. The inability to operate the chainsaw after starting, requires a full diagnosis at the service center.

All of the above options for engine malfunction have similar causes, which, depending on their neglect, can have different manifestations. For example, with a slight intake of air into the crankcase of the engine, its work will not change much, the engine power will drop slightly, its maximum speed will increase, and it will be able to heat up a little more. In the middle stages of air leakage, the engine will stop idling and will get very hot during operation. Strong air suction, will make it impossible for the saw to work, it will start and immediately stall.

In parallel with the visible manifestations of malfunctions, for example, the inoperability of the chainsaw after starting, processes will take place inside the engine at the time of its malfunctioning, which irreversibly lead the saw to the most serious consequences, for example, melting the piston, jamming the crankshaft.

The chainsaw starts and stalls. the reason

If the chainsaw starts and stalls at the first attempts 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 cause may be in the tube that leads it to the lubricating mechanism.

Another reason may be a broken carburetor. If he only needs adjustment, it can be done independently in accordance with the instructions. 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 saw stalls when tilted, since the remaining fuel mixture ends up in the part of the tank opposite to the place where the suction tube is located.

Husqvarna 137 chainsaw stalls under load

Why does a chainsaw stall when heated

The situation in which a chainsaw starts up cold, and in the process of heating it can stall, is familiar to many who deal with them. The main reasons for this behavior of the saw are as follows.

  • Defective ignition module (coil). Determine the malfunction by checking the spark first on a cold engine, and then on a hot one. If there is no spark on a hot engine, then it is worth trying to fix the malfunction by replacing the ignition coil.
  • The carburetor of the chainsaw has an incorrect setting (fills a hot candle). You can determine the problem by how the saw is started on a cold one. If for a cold start it is not required to close the air damper, and the engine starts without a preliminary flash, then the fuel mixture is formed incorrectly and after the engine warms up, the fuel fills the spark plug and makes it impossible to start. The problem is eliminated by adjusting the carburetor.
  • Spark plug defective. In such a situation, similar to a faulty ignition coil, the spark disappears when the engine heats up. It is worth trying to replace the spark plug with a new one, and if this does not help, then you need to check the ignition coil and the gap between it and the flywheel.

You can check the ignition coil using a multimeter or by replacing it with a known good one. The test with a multimeter of the primary and secondary windings is carried out in the resistance measurement mode. The resistance index of the primary winding, working coil, is 1 kOhm. secondary 4 kOhm.

Reasons why a chainsaw stalls under load

This article of the construction site remstroisovet.ru will consider the main reasons why a chainsaw may not start or stall under load.

The most common of all are the following reasons:

Because of what the power of the chainsaw decreases

The same applies to the air filter, if this kind of problem occurs, it must be cleaned immediately. Now at the expense of the spark plug, if it is heavily soiled, it is also cleaned and adjusted if necessary. It is the wrong gap between the electrode of the spark plug on the chainsaw that can lead to the fact that it starts to stall, and in general, it is extremely unstable to work.

Why does a chainsaw stall under load

Chainsaw stalls under load. reasons what to do?

However, before you climb inside the chainsaw, first try a few simple steps. For example, adjust the carburetor of your chainsaw, try changing the fuel mixture to a new one. Perhaps the chainsaw chain is so tightened that the clutch is not able to withstand the load that has arisen, which is why the chainsaw immediately starts to stall under load.

How to adjust a chainsaw carburetor

To adjust the carburetor on a chainsaw, you need to have a small thin screwdriver and a few minutes of free time. It should be noted that after adjusting the carburetor, the engine may not behave as it should for some time, under load, for example, on “cold” or “hot”.

To adjust the carburetor of the chainsaw, use two bolts on the side, one of which enriches the fuel mixture with oxygen, and the second regulates its amount into the combustion engine.

First, tighten the two screws all the way, and then unscrew them until the chainsaw engine starts. Only then should each screw be tightened or unscrewed in turn, until the engine of the chainsaw starts to work as steadily as possible and without failures when pressing the throttle stick.

Spark plug problems and solutions

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

Husqvarna 445 bog issue

Chainsaw spark plug should be changed once a year.

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

  • Filling the spark plug with gasoline at the time of start. To eliminate the problem, turn out the candle and dry it without igniting it. Excess gasoline is drained from the engine through the hole-socket into which the candle is screwed. After a break of 30 minutes, the candle is put in place, the mechanism starts.
  • No spark due to poor contact of the spark plug tip with the high voltage wire. The connection is checked, in case of violation, the defect is eliminated.
  • There is no spark due to a malfunction of the electronic ignition unit. If there is confidence in the reliability of the connection of the tip with the high-voltage wire, but there is still no spark when the starter is 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.
  • Incorrect spark plug gap. In different types of candles, this indicator ranges from 0.2 to 0.5 mm. The correct gap is set with a feeler gauge of the appropriate thickness. A larger or smaller gap for a given type of candles is not allowed.

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

Spark plugs can indicate a saw malfunction.

So, if the candle 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, check the entire gasoline supply chain from the carburetor itself.

At the same time, the presence of a characteristic black carbon on the plug body is a sign that the carburetor is probably poorly adjusted. This causes the fuel mixture to become oversaturated with gasoline. Oil may have spilled into the fuel. In this case, clean the spark plug, replace the fuel and adjust the carburetor.

What to do if a chainsaw stalls?

  • The car stalls at idle: possible causes
  • Fuel and air filter problems and solutions
  • Spark plug problems and solutions
  • Substandard carburetor operation
  • Problems associated with improper operation of the fuel system
  • Idle problems due to faulty muffler
  • Faults of the cylinder-piston group

Builders, installers, rescuers and summer residents # 8211, sooner or later, completing their tasks, take up the chainsaw. And the final result of their activity largely depends on how reliably this tool will work.

The chainsaw is used to cut wood.

It is worth noting that the chainsaw belongs to relatively simple devices. Nevertheless, it, like other mechanisms, periodically fails. When a chainsaw stalls while idling (this is one of the most common malfunctions), the biggest problem is to determine the reasons for this behavior of the device. If the source of the “disease” is correctly installed, it will not be so difficult to return the apparatus to a working position.

Therefore, the first step is to find out what kind of malfunctions there are with a chainsaw and what leads to engine stops at idle.

The chainsaw starts and stalls, the reason

A chainsaw is no longer a luxury, but a necessary tool for anyone who has at least some suburban area. With its help, you can carry out garden work, harvesting firewood, finalizing lumber and much more. There are a lot of models of chainsaws on sale, differing both in power and in overall quality of performance. You can verify this here. e-katalog.ru.

However, any technique can be capricious, and chainsaws are no exception. Let’s consider the most common problems.

Idle problems due to faulty muffler

In the event of a noticeable drop in the power of the internal combustion engine at idle mode, after which the car often stalls, it is necessary to remember to check the muffler. The fact is that the specified unit may be heavily clogged with resinous particles and combustion products of the spark extinguisher falling 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 gas emission. This situation must be corrected without fail. 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, 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 unit and its individual parts are thoroughly washed with a cloth soaked in water and detergents. If the muffler is collapsible, wait for all its parts to dry completely. The non-collapsible 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 respiratory tract of a person.

Husqvarna Tune Up 460 Rancher Chainsaw. Fix Chainsaw Bog Down Issue

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

Chainsaw stalls when rpm increases

The reasons for this phenomenon are similar to the previous ones: either the problem is in the fuel system, or in the air filter. Try to disconnect the fuel hose from the carburetor. if the gasoline does not flow well (but you know for sure that there is fuel in the tank), then the reason is in the gasoline filter. You can, at the same time, check the fuel pump. fuel should not seep through it. If this happens, then it is advisable to replace the pump.

The tool stalls immediately after starting

One of the possible reasons is lack of fuel. Check the amount of fuel in the gas tank and add if necessary. In this case, you should strictly follow the recommendations of the instructions, especially with regard to the quality of gasoline and oil. In our country, such subtleties are often ignored, refueling the saw with whatever it is necessary, which causes accelerated engine wear and leads to failures.

The saw can also stall due to deterioration of the spark plug contact with the high-voltage wire. This can be caused by mechanical shear or carbon deposits. Sometimes it is recommended to periodically replace the spark plug with a new one, even if the old one did not show any problems in operation.

The chainsaw can operate normally in a straight, horizontal position, but stalls when leaning sideways. As a rule, this is also associated with a lack of fuel: the fuel pipe rises when tilted, and if there is little fuel, then it rises above the fuel level.

Fuel and air filter problems and solutions

The chainsaw will shut off at idle speed if the fuel or air filter becomes clogged. To find out the condition of the first element of the fuel system, disconnect the gas 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 enters the carburetor weakly or does not flow out of the hose at all, then, most likely, the filter is clogged with debris.

To clean it, remove it from the tank (all the fuel must be drained from the tank until this moment). Extraction takes place 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 it for a number of reasons, the used filter is changed to a new one.

The chainsaw may stall if the fuel filter becomes clogged.

The air filter can also be clogged with dirt or dust, resulting in malfunctions at idle. It should be remembered that clogging of this filter occurs quite often, as a result of which the flow of air into the system is difficult. The proportion of gasoline in the fuel-air mixture increases, and it turns out to be too rich. In this case, normal engine operation should not be expected.

For cleaning, the air filter is removed with special care so as not to shake off the dust into the carburetor. Then 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.

Why does a chainsaw stall under load

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What to do, if chainsaw deaf

Hello dear subscribers and readers of my blog! By phone Andrei Noak. We continue the theme of the chainsaw. So, I already said earlier about what needs to be checked in a chainsaw in order to find out the cause of its malfunction. Today I will switch to more valuable instructions so that you do not look for the cause of the problem for a long time and do not know how to solve it. Chainsaw. not the most complicated tool, but you need to take care of it properly. There are different cases, sometimes chainsaws stop when you press the gas, sometimes load, and sometimes they don’t idle. Let’s look at different situations and try to find the right solution.

If you find that the tool won’t start or stop, you don’t need to rush to the service center right away, you can try to fix the problem yourself.

What to do if the lawn mower or saw stalls at high RPM (under load)

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

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.

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Why the chainsaw chain does not rotate when the engine is running even at full speed?

  • Leading asterisk. Either it is jammed, or the crown is worn out so much that it does not engage and the chain does not spin on the chainsaw. In any case, it is necessary to disassemble the sprocket in order to find out the exact reason why the chain does not spin. If the crown is worn out, it is necessary to replace the sprocket (or the crown itself, if the sprocket has a prefabricated structure).
  • The chain brake is stuck. As a result, the sprocket is blocked by the brake mechanism, while the motor runs. Stop the engine and release the brake. If this happened under load, the brake mechanism will have to be changed, as well as the sprocket, because due to the high temperature, many elements can melt and overheat.

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The prerequisites for which the chainsaw starts and immediately stalls, does not develop speed and does not give out the highest power, and their elimination

Owners of chainsaws from time to time have to deal with the fact that the saw, for no apparent reason, stops working normally. I remove the suction the lawn mower stalls. To figure out why the chainsaw stalls under different operating modes, and also to outline how you can diagnose a malfunction, we will try in our article.

Why the chainsaw does not start well and stalls

In case of poor start-up of the equipment “to cold”, the problem may be in the absence of compression, i.e. rings are worn out due to a long service life, they need to be replaced. Sometimes the reason that the engine does not start well in an unheated state is a problem with the muffler, as well as poor contact between the spark plug and the wire.

Also, the reasons for a poor start can be wear or damage to the gasket, rubber cuff in the accelerator pump of the carburetor, due to which there is an additional flow of air, leading to an increase in the speed of the saw.

Chainsaw starts and stalls: reason, video

  • The most commonplace reason why the chainsaw started up and stalled may be the low fuel level in the tank. This can be confirmed by stopping the operation of the tool when tilting, when the remaining fuel accumulates in a certain place in the fuel tank. With low-quality fuel, there may also be a problem with the operation of the chainsaw, in this case, you need to completely replace it.
  • Breather blockage, which significantly reduces fuel consumption to the engine.
  • Insufficient contact of the wire cap with the plug, which leads to strong heating of the plug insulator. Deterioration of contact can occur due to mechanical shear or carbon deposits.
  • Broken spark plugs.
  • Clogged muffler, which impairs exhaust gas output, causing the engine to stop running. For this reason, the chainsaw can start and stall at idle speed. Sediment in the muffler can also appear due to poor-quality fuel or improper use of the tool.
  • Poor carburetor adjustment.
  • Breakage of the piston group
  • Fuel filter or pump problems. In this case, gasoline may flow through the pump or poorly flow through the fuel filter to the carburetor. As a result, the chainsaw starts up and stalls when the speed increases.
  • Dirty air filter. 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 an increase in revolutions.
  • Short circuit due to lack of or insufficient lubrication, or a problem with the chain brake.

The reasons why the 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 technique, this tool tends to fail, despite the simple device.

The classification of the main faults includes:

  • complete absence of engine plant
  • the engine starts and stalls
  • unstable tool performance
  • work stop under load
  • loss of power.

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

  • Manufacturing defect
  • Lack of fuel
  • Problems with starting the ignition system
  • No spark from spark plugs
  • Poor fuel mixture
  • Carburetor clogged
  • High voltage wire problems
  • No compression.

Why does the chainsaw start and stall, what to do in this case? It is necessary to consider in detail the reasons for this.

Troubleshooting

The operation of the equipment must be correct, with periodic inspection of the constituent elements to prevent damage. To troubleshoot, it is necessary to check all components of the equipment for their functioning.

If the chainsaw starts and stalls, the cause can be eliminated on your own. If it is a shortage or improperly prepared fuel mixture, it must be corrected. For prophylaxis during the idle time of the chainsaw, you should always drain the remaining fuel.

Spark plugs should be checked periodically. In this case, remove carbon deposits that clog the joint gap, and also check the tips for the presence of fuel. Another cause of spark plug problems can be when they get wet with gasoline. To do this, they need to be removed, wiped off with a rag and left to dry. Defective spark plugs are replaced.

If there is no spark between the spark plug and the high-voltage wire, but if there is a good connection, the ignition unit must be replaced.

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

The carburetor must be adjusted if the chainsaw stalls at idle speed. Fine tuning is a rather laborious process, so it is usually done in service centers. But, on some models there are elements for setting it up, just turn the bolt half a turn to increase the speed of the chainsaw, the problems will be eliminated. If the jets, nozzles, channels and filters are clogged, the entire carburetor must be disassembled and cleaned. When the oil seals, gaskets, cuffs are worn out, it is necessary to replace them, preventing air leakage.

If there is a problem with the fuel or air filter, it is necessary to replace the fuel pump or clean the air filter.

If the breather is clogged, it must be cleaned with a regular needle.

When the chainsaw starts up and immediately stalls, the reason may lie in the malfunctioning of the chain. To troubleshoot problems, check the presence of oil in the chain lubrication container, as well as the oil return pipe for breaks or blockages.

When inspecting the piston group, pay attention to the cylinder; if necessary, replace it or the piston. The cylinder can be bored to fit the new piston. If the piston with the cylinder is normal, you should pay attention to the defects of the piston rings and the need to replace them.

Among other things, you should control the service life of the parts specified in the product passport, which include the drive sprocket, tire, chain, part of the anti-vibration system, and replace them in time.

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.