Husqvarna 240 stalls when throttle is pressed

To the cold

The reason why the device does not start on a cold one is often a violation of the engine start sequence.

You should read the instructions: manufacturers indicate how to properly start the chainsaw.

To enrich the fuel, you must first close the choke. After that, the fuel is sucked in. For this, a special primer is used. Then turn on the ignition. Several strokes of the starter must be made before the first engine flash The shutter opens and the device starts up. If the sequence is violated, a step is skipped, incorrect operation is possible.

If the chainsaw stops starting, the likely cause is a problem with the fuel system. Starting problems can occur due to improperly adjusted carburetor, blockage in the line and fuel filter. The quality of the fuel also matters. If the fuel is diluted with water, the appliance does not start well or does not work at all. The mixture must be fresh.

A possible cause of a problem starting is an engine malfunction. Wear or breakdown of a part leads to undesirable consequences: a decrease in compression in the cylinders and other troubles. With such problems, it is recommended to contact a specialist, since it is difficult to diagnose and fix a breakdown on your own.

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, its operation 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, inside the engine at the time of its malfunctioning, processes will take place that irreversibly lead the saw to the most serious consequences, for example, the piston melting, crankshaft jamming.

Why does a chainsaw stall under load

In some cases, the chainsaw under load is unable to work normally and simply stalls. A common reason for this behavior is improper carburetor adjustment, or air leaks through the crankshaft oil seals or carburetor gasket. And also this behavior can occur due to leaks in the carburetor.

It is best to diagnose the cause and eliminate the fact that the chainsaw starts and stalls under load, best of all in a service center, since a special tool is needed to check the tightness of the carburetor and crankcase.

A saw that is unable to operate under load will also be unsteady at idling. They will “float”. Diagnostics begin with a check for leaks in the crankcase and carburetor. If air leaks through the crankshaft oil seals, they must be replaced. If air leakage in the carburetor is detected, the cause can be eliminated by installing a repair kit of gaskets.

Only after the above actions have not yielded results and the crankcase with the carburetor is sealed, you can start adjusting the carburetor.

The reason for this algorithm is as follows, if air leakage from the crankcase is not eliminated, but the carburetor was simply adjusted to normal engine operation, then the fuel mixture will contain more fuel than is required with a sealed crankcase, which in turn will significantly increase its consumption. Also, most likely, carbon deposits will appear in the engine, which will also negatively affect the further operation of the chainsaw.

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In some models of chainsaws, to ensure the operation of the fuel pump, special hoses are installed that transmit an air impulse from the engine crankcase to the carburetor fuel pump. If this hose is frayed, the saw will idle unevenly and will not work at all under load.

Owners of Husqvarna 137 and Husqvarna 142 household chainsaws, in case of any deviations in engine operation from the norm, should first of all check the impulse hose, since this is considered the most common reason for the breakdown of these chainsaws.

Idling

In situations where the chainsaw stalls at idle, it is required to inspect the condition of the muffler. If the part is dirty, exhaust gases are poorly discharged, the engine cannot continue to work, it stops.

The saw stalls at idle speed and in cases where the carburetor is incorrectly set. For beginners, it is better to entrust the repair to a specialist, since there is a possibility of incorrect settings, due to which the tool will not be able to work. A tachometer is required to adjust the carburetor.

Why the chainsaw won’t start

In the event of defects, it is necessary to check the serviceability of the components.

If a new chainsaw does not start, you should check the presence and supply of fuel, the appearance of a spark on the spark plug, the functioning of the exhaust valve, the condition of the filters. The operation of the deafening device of the saloon built into the fuel cap may also be disrupted.

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Why the chainsaw doesn’t pick up speed and stalls

If the chainsaw is unable 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. In this case, 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.

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

When tilted

If the saw does not develop speed when tilted, shuts down, stops working, you need to check the fuel level in the tank. If it is not too high, the tilted device is not supplied with sufficient fuel because the fuel pipe is above the mixture level.

Algorithm for checking the crankcase for leaks

  • Remove the side cover and tire from the chainsaw.
  • Unscrew the spark plug and put a lace with knots into the cylinder through the spark plug hole, thereby stopping the movement of the piston and crankshaft.
  • As a lace with knots, you can use the old cord from the starter, tying knots on it every 3-5 cm.
  • Spin the chain saw drive sprocket.
  • Remove the oil pump cover and the pump itself.
  • Remove the starter from the chainsaw.
  • Unscrew and remove the flywheel.
  • Remove carburetor.
  • Using a syringe, through the carburetor hole in the cylinder, pour gasoline into the crankcase, while observing the crankshaft oil seals. If gasoline flows through them, then the oil seals have become unusable and must be replaced with new ones.
  • It is better to entrust the installation of oil seals to professionals.
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An indirect sign of crankcase leaks are oil leaks in the area of ​​the oil seals.

Saw_huskvarna_240_deaf_when_pressing_gas

Chainsaw starts does not stall cause

Owners of chainsaws have to deal with the goal that the saw, for no apparent reason, stops working normally. To figure out why the chainsaw stalls under different operating modes, and now we will try to outline, most diagnose the malfunction in our article.

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Wrong fuel

An important fact is that for the trouble-free operation of the tool, it is necessary to be quite careful about the fuel itself. Since if this kind of mixture is not prepared correctly, then most chainsaws will simply not start. Consequently, not every owner will guess 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 exclusively high-quality gasoline for the mixture.

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 definitely use in one or two weeks, but not more (see the proportion of gasoline and oil for a chainsaw).

Otherwise, overexposure of the mixture directly in the canister will lead to the fact that it will lose all its octane properties and this will lead to significant problems with the instrument.

Summing up

When the first signs of improper operation of the chainsaw appear, it is worthwhile to carry out a full diagnosis of it. In order to avoid damage to the saw as a result of improper maintenance, it is better to entrust the work of identifying and eliminating engine faults to professionals. And most importantly, you do not need to use a chainsaw with minor defects, since this will lead to even greater problems.

There are often cases when the owners of chainsaws are faced with their breakdown and it does not matter what model of this kind of equipment, since the nature of the breakdowns is almost the same for everyone. Well, the chainsaw has stalled and what’s next? Undoubtedly, you can refer the equipment to specialized services that will repair your “iron friend” for a fee. But as the saying goes: why pay more?

After all, you can personally disassemble the tool and repair it, since the breakdown may be insignificant, and in the service you will pay a lot for this. But naturally, in order to bring the instrument back to life yourself, you need to be able to understand the reasons for its breakdown and how to troubleshoot it. So let’s learn! In this article, you can find answers to questions regarding situations when the instrument simply stalls after directly pressing the gas. So let’s get started.

Summing up

Definitely, every item we buy has its own expiration date and sooner or later it breaks down, 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 careless about technology (see about correct operation and how to properly cut a tree so that it falls in the right direction). and when it stops working, then we try to find ways to eliminate breakdowns, while turning to a huge number of services.

But remember that even though technology breaks down, we can extend its “life”. All that is needed is to simply take care of it, do a break-in after replacing parts (read how chainsaws are run-in here) and keep its parts clean and tidy. And then, undoubtedly, it will serve for many more years. It is also important to use only high quality spare parts and “additives” (see attachments for chainsaws). Then your equipment will work smoothly, and you will simply forget what repair is.

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Husqvarna 240 won’t stay running

Also with STIHL chainsaw ms 180.

Despite the high performance of chainsaws, sometimes there are times when the tool stops working normally. In particular, a common situation is the fact that the chainsaw starts to stall when you press the gas. For experienced owners of tools, this problem is known, but beginners who are faced with this for the first time will have to seek help from specialists. But do not rush, in the material you can find all the important causes of the malfunction, as well as try to eliminate them.

Filling the mixture when the mechanism is running

Also, the cause of a breakdown can be the direct filling of the mixture with a candle at the moment when the mechanism is started. In order to solve this problem, it is necessary to unscrew and dry the candle, but remember that it should never be ignited. Excess fuel must be drained through the hole (plug), wait 20-30 minutes, then put it back in place and try to start the tool again.

Why the chainsaw doesn’t pick up speed and stalls

If the chainsaw is unable 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 five 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. In this case, 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.

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 the chainsaw immediately stall and thrash when the gas is pressed

Chainsaws are fairly reliable and uncomplicated designs. Therefore, if you properly care for them and handle them based on the manufacturer’s recommendations, then they fail well, very rarely and various kinds of breakdowns are quickly eliminated. But if you are faced with this situation and want to personally repair your tool without resorting to the help of professionals, then delve into the information provided below.

In fact, it is unambiguously and precisely impossible to determine the reason why the instrument does not start or stalls when you press the gas, since there are a lot of factors affecting this. But do not forget that, starting from the fact that the chainsaw is equipped with a simple two-stroke engine, conditions such as lubrication, fuel, spark and air are important for its effective performance.

Consequently, the carburetor is directly involved in the preparation of the fuel-air mixture, the filter cleans the air from dust, the ignition unit and the spark plug create a spark, and the gasoline contains grease.

That is why it is necessary to search for the causes of this kind of breakdown in a sequential order, starting directly from the simple ones and gradually moving on to the complex ones. And this is an important factor in the correct repair, since the person who, without thinking, begins to deal with the analysis of the carburetor, brings it to risk. Since this kind of unit must be repaired or adjusted directly in special workshops (read about adjusting the carburetor).