Stihl Chainsaw Won’T Start When Hot

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The lightweight and compact model of the tool is used for domestic purposes, but, despite the optimized performance, sometimes the Stihl chainsaw does not start. Problems are manifested in the fact that the engine turns on and stalls, is unstable, it can not develop the required power or suddenly picks up high revs.

Stihl Chainsaw Won'T Start When Hot

What to do

The power tool is operated according to the manufacturer’s instructions. Only after checking the chain tension does the unit start. At the same time, the filling of the fuel tanks with mixture and oil is controlled, the device is securely fixed in the hands. If, when all the rules are followed, the mechanism refuses to work, then the Stihl chainsaw is repaired.

When you hit the gas

The sawing units are idling, but the saw stalls when the gas is pressed, as the load increases. The tool is warmed up before use, the engine runs at idle for a minute. If this is neglected, the motor will stop after pressing the pedal. Other reasons could be:

  • Clogged or unregulated combustible fuel mixing unit;
  • A clogged air filter does not provide the required air flow when the load increases;
  • A dirty gasoline filter DOES NOT pass the required amount of the mixture;
  • Rubs the wall of the cylinder and piston.

A low octane number of fuel becomes a prerequisite for braking, since this circumstance does not allow the engine to reach the required power with an increase in load.

Why does a chainsaw stall when heated

It often happens that the chain saw 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. This problem can be identified 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, then this means that after the engine warms up, the fuel fills the candle. The solution to this problem is to adjust the carburetor. Details on carburetor adjustment
  • Coil (ignition module) malfunction. You can identify this problem 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 did not lead to a solution to the problem, then the ignition module and the distance between it and the flywheel should be checked.

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.

Idle speed adjustment

Before adjustment, the tool is maintained. In order for the idle speed adjustment to be effective, prevention is done:

  • Cleaning the carburetor;
  • Flushing the engine;
  • Cleaning the air filter;
  • Warming up the engine.

To adjust the operation of the mechanism at idle speed, use the Corresponding adjusting screw. Its rotation depends on the required setting:

  • With standard adjustment, the screw is turned against the clock hand to the point where it will turn tightly. After that, make 2 circles in the direction of the arrow.
  • If the saw is running at low rpm, turn the screw clockwise until the chain starts moving. Then make half a circle in the opposite direction.
  • At high frequency, the regulator is turned against the clock hand until the circuit stops. After that, the rotation is continued for another half turn in the same direction.

It will NOT work to adjust the idle operation if there is an air leak into the engine through the acceleration gasket, oil seals or for another reason.

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.

Read more:  Stihl Chainsaw Oil Pump Replacement

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.

Why stalls at full speed

Very often you can hear the question why the chainsaw stalls at full speed. There may be several reasons. First, you need to consider how the saw stalled. Suppose the tool worked normally and suddenly, for no apparent reason, it suddenly stalled and the starter did not turn. In such a situation, you can be 100% sure that the chainsaw is jammed and you need to start its overhaul.

The second situation is when the Stihl 180 chainsaw worked normally, then gradually lost power for a short time and stalled, while the cylinder overheated. In this case, most likely the reason is air leaks under the rubber pipe connecting the carburetor to the cylinder or its rupture. The mixture was depleted, resulting in overheating. You can eliminate the cause by changing the pipe.

At full speed

Sometimes the engine will stall after normal operation. To establish the cause, pay attention to the accompanying circumstances:

  • Motor stalls in the middle of operation for no apparent reason. The starter is stationary and does NOT turn. It means that the tool is jammed and requires urgent repair.
  • During normal operation, the power is reduced for a short time and the engine stops, the cylinders are overheated. The situation indicates the occurrence of air suction under the rubber pipe between the carburetor cylinder, possibly due to a rupture. Air depletes fuel, nozzle replacement required.

Stihl Badly Turns On Hot

Why won’t the chainsaw start? Frequent malfunctions and methods of their elimination

Chainsaws. lightweight in design and reliable in operation.

With the correct appeal, breakdowns appear in them occasionally and are quickly eliminated if the owner knows where to find the cause.

And yet, the question of why the chainsaw does not start is absolutely impossible to answer. Such a tool in its own database is an ordinary two-stroke gasoline engine. It requires four conditions for its normal operation: fuel, air, spark and lubricant.

The carburetor is responsible for making the air-fuel consistency, the filter cleans the air from dust, the spark makes the ignition block and the spark plug, and the lubricant is in gasoline.

The reasons why the chainsaw refuses to start must be found one by one, from the usual and moving on to more complex ones. Anyone who immediately rushes to disassemble the carburetor when the chainsaw does not start well on a hot one is at great risk. This common hearing knot is better done and adjusted in a special workshop, and not on the knee.

When, some domestic manufacturers of chainsaws for the opportunity, users did not climb into the carburetor to configure the composition of the fuel consistency, they make the jets unregulated.

For trouble-free operation of the chainsaw, you need to pay special attention to fuel. If the fuel mixture is improperly mixed, even a reliable Husqvarna will not start. In this case, the owner will begin to look for the cause of the malfunction anywhere, but not in the fuel. To eliminate this factor, you must always prepare a fuel mixture from high quality gasoline and the brand of oil that is indicated in the instructions.

It should be done in such quantity that it can be fully developed in 1-2 weeks. If you keep it in the Canister for a month, then gasoline will lose its octane quality and problems with the saw operation are guaranteed to you.

General information

The characteristics of this saw are a reason for the pride of the German manufacturer. In this case, the unit is a tool, which is designed to perform a small amount of work. The tool is positioned for domestic use, which confirms the intensity of its use, which does not have to exceed 20 hours per month. Having at your disposal such a unit, it will not be difficult to maintain order in your garden, to prepare firewood for the winter, as well as to clear areas. At the same time, he will be able to help you in solving other problems where there is no need to perform complex manipulations.

Clockwork device

As with other saws, the carburetor acts as the main starting device. Considering in more detail the carburetor, which the Stihl 180 chainsaw is equipped with, it should be noted that it has a single tuning screw. In other words, it is a kind of idle speed adjustment screw. In this case, the nozzle, which has a full load, is stationary all the time.

In other words, the regulation is not applicable to it. In turn, there is no way to influence the full load in any way. You also need to pay attention to the factory settings, because of which the air / fuel mixture is supplied directly to the engine. over, this principle remains regardless of the operating conditions of the tool.

Replacing the crankshaft bearings

It is better to replace the crankshaft bearings in a specialized service, because when replacing, you will need to completely disassemble the Stihl 180 chainsaw and remove all its main components.

Without some experience or at least skills in repairing Similar chainsaws, it will be impossible to replace the crankshaft bearings efficiently, but it will not work.

So, we figured out the absence of a spark, but what to do if there is a spark, and the answer to the question why the Stihl 180 chainsaw does not start, comments. The reason may be hiding in the fuel system.

Clockwork device

The basis of the plant of this kind of model, as well as all other chainsaws, is the carburetor. But since we are talking today in the Stihl 180 Chainsaw, there will NOT be a departure from the topic. So. The carburetor in this model has a single tuning screw, that is, it is a kind of idle travel adjustment screw. While the fully loaded jet is stationary.

Read more:  Carburetor Adjustment Stihl 260 Chainsaw

Stihl 180 chainsaw carburetor

In simple terms, we can say that it simply cannot be adjusted (see here), while the full load setting simply cannot be changed. It is important that the carburetor itself at the factory was tuned in such a way that regardless of the actual conditions under which the chainsaw is operated directly, the air-fuel mixture is supplied to the engine itself.

Saw won’t start: reasons and solutions

  • Speaking of dust 180, it must be said that this tool has many advantages. At the same time, NOT only this unit and disadvantages. Attention will be paid to them.
  • It is a common situation that many owners find themselves in when the Stihl chainsaw does not start and fills in a candle. This is usually attributed to the theca formation of the oil used to lubricate the chain. The same happens for the reason that over time, the area where the hose of the oil pump and the oil tank joins loses its former tightness.
  • In principle, this problem is solvable, but in order to do everything correctly, you need to take into account the design of the chainsaw in question. By itself, this process provides for certain nuances, first of all, it is necessary to disassemble the unit, and without this it will be impossible to get to the right place.
  • For many owners of this saw, the question is, why does the Stihl 180 chainsaw not start? Experts give the following recommendation on this matter: the first thing to do for those who have encountered a similar problem is to open and then close the lid located on the gas tank. There is another solution. you need to remove the candle and let it dry. You can also create the effect of artificial ventilation for the combustion chamber. Most often, these recommendations are enough to bring the device back to working condition. However, this does not always help to restore the operation of the Stihl chainsaw.
  • If there is a spark, but attempts to start the chainsaw lead to nothing, then in this case you need to check the supply of gasoline, the air filter, and then make sure that the spark plug is working. Such manipulations must be done for the reason that most often this kind of malfunction is caused by contamination of the breather. And if a plug forms in it, then, naturally, a vacuum environment will be created in the gas tank, due to which the fuel will not flow. A similar problem can be solved quite simply, for which it is enough to remove the dirt using a needle.
  • Some owners face this problem when the saw itself starts, but immediately starts to stall. Look for the reason that the saw does not start, you should go to the carburetor. Most likely, he managed to get clogged and afterwards does not allow the tool to work correctly.
  • To make sure that the breather is NOT the cause of the malfunction, and it is in working order, you must first disconnect the fuel hose from the carburetor, and then find out if this or fuel is generated.
  • Keep in mind that it is natural for your chainsaw to have a strong and stable jet of gasoline. In addition, it is often possible to observe a situation when the Stihl 180 chainsaw does not start hot and immediately stalls at the same moment or after a while. Usually a similar malfunction is associated with a muffler. Most likely, it has accumulated a lot of deposits associated with long-term operation of the tool, which is usually accompanied by the formation of exhaust.
  • At the same time, the saw may stop starting if the tool chain is poorly lubricated. This can be facilitated by channels that have a plug, or the reason should be looked for in an oil line that has a leak.
  • Theca in the connecting pipes or in the place where the oil pump fittings are installed can become a serious problem.
  • There are cases when the Stihl 180 chainsaw begins to stall due to a failed cylinder. To make sure if this is really so, it is enough to conduct an inspection. If, as a result of the examination, you find irregularities and chips, then this is a clear sign of breakage.

Other malfunctions

  • For many owners, the question of the correct idle speed after emptying the fuel from the gasoline tanks is relevant for many owners. According to experts, there is no need to worry too much about this. However, if you have to deal with a similar problem often, then it is enough to manipulate the carburetor by reducing the engine speed in order to restore the normal operation of the tool.
  • In some cases, the owner may need to clean the muffler as this part may be the cause of the malfunction. This operation is easy enough. It must be remembered that many owners are faced with problematic chainsaw operation due to a faulty carburetor.
  • Although in SEPARATE cases it can be quite simple to eliminate the malfunction, it is most preferable if specialists will repair this equipment. After all, not every one of us has the necessary knowledge and skills, and this is fraught with the fact that during self-troubleshooting there is a risk of completely disabling the tool.

For what reasons the Stihl MS 180 chainsaw will not start

The Stihl MS 180 chainsaw is considered one of the most reliable tools used in gardening. But in any technique, situations occur when it does not start for some reason. Let’s look at the main malfunctions due to which the Stihl 180 will not start or start poorly and how to fix these malfunctions.

Ignition coil problems

Replacing the crankshaft bearings

It is better to replace the crankshaft bearings in a specialized service, because when replacing, you will need to completely disassemble the Stihl 180 chainsaw and remove all its main components.

Read more:  What to do if the mower won't start

Without some experience or at least skills in repairing Similar chainsaws, it will be impossible to replace the crankshaft bearings efficiently, but it will not work.

So, we figured out the absence of a spark, but what to do if there is a spark, and the answer to the question why the Stihl 180 chainsaw does not start, comments. The reason may be hiding in the fuel system.

Fuel line diagnostics

Typically, the diagnosis of the fuel supply system begins with checking the condition of the fuel filter. To do this, unscrew the tank cap and using an aluminum wire bent at the end, remove the fuel hose from the tank, with a filter at the end.

Having taken out and dismantled the filter, you can try to blow into it, if the air does NOT flow, then the problem has been found. If everything is in order, then you need to check the system for clogging.

To check the fuel supply hose, you must disconnect it in the place where it connects to the carburetor, and then blow into it. The clogged hose can be mechanically cleaned, if this is not possible, replace with a new one.

In the event that the supply hose and the fuel filter are normal, and the fuel supply is not observed, the reason may be hidden in a malfunction of the air pulse to the fuel pump.

Checking the pulse from the engine crankcase

The fuel pump on the Stihl MS 180 chainsaw is installed directly into the carburetor and operates under the influence of impulses from the engine crankcase of the Stihl 180 chainsaw. The impulse is transmitted through the impulse channel in the rubber pipe connecting the cylinder to the carburetor.

Clogging of the channel is fraught with the appearance of problems with the supply of fuel or its complete absence. To check the pipe, it is necessary to remove the air filter housing and the carburetor, then check the channel for clogging with a thin metal wire.

Another reason associated with the absence of an impulse in the pipe channel is the depressurization of the engine crankcase, which results in air leakage from it and a decrease or complete cessation of its supply to the fuel pump. Depressurization results in a partial or complete loss of the fuel pump’s performance. To check the tightness of the crankshaft oil seals, and indeed the crankcase of the Stihl 180 chainsaw, a special vacuum gauge is used, and since it is a special-purpose tool, it is mainly available only in service centers. The question arises, what to do?

You can check the impulse supply using a syringe on the engine with the carburetor removed. You will need to draw a little oil into the syringe to lubricate the engine and squeeze it out into the impulse channel of the pipe, then pull the starter. If the impulse does not pass, the oil will remain in the channel and you should look for the cause deeper, disassemble the engine and check the oil seals. If the oil is squeezed out of the channel, then the problem may be hidden in the fuel pump itself.

Floods a candle

In the people, the phenomenon in which a spark cannot ignite a large amount of fuel is usually called candle flooding. The cause of the malfunction lies in the carburetor, or in improperly starting a cold engine. If a malfunction is detected, first you need to “purge” the engine.

Defective crankshaft bearings

With a defect in the crankshaft bearings, a slight backlash is observed on it. You can check for backlash by shaking the flywheel of the Stihl 180 chainsaw from side to side. If there is a backlash, then, under the action of its magnets, the flywheel is attracted to the contacts of the ignition coil, since the backlash on the bearings allows it to do this and as a result the spark disappears.

There are sparks on the Stihl 180 Chainsaw

The main malfunction due to which the stihl ms 180 chainsaw does not start may be the absence of a spark between the electrodes on the spark plug. Symptoms of this malfunction can be found by unscrewing the spark plug and inspecting it. Having discovered during inspection that the spark plug is wet, it is necessary to start looking for the reason for the absence of a spark on the spark plug.

Defective spark plug

The first thing to do is to check the performance of the candle.

This is pretty easy to do. The candle is inserted into the cap of the high-voltage wire and pressed against the engine cylinder, after which the starter moves several times, if there is no spark between the electrodes of the spark plug, then it is faulty or the ignition module is faulty.

In order to find out for sure that the problem is in the spark plug, it is necessary to check the known good one in the same way. If, as a result of the check, a spark appears, then the problem has been found and to eliminate the malfunction we replace the spark plug with a new one.

Algorithm for checking for lack of fuel supply

  • Unscrew the candle;
  • Using a syringe, pour 1-2 cubes of the fuel mixture into the candle hole;
  • Install the candle and put on the high-voltage wire cap;
  • Set the engine control lever to the hot start position;
  • Pull the starter several times.

If, after several movements with the starter, the Stihl 180 chainsaw started up and immediately stalled, then the suspicions of the lack of fuel supply were confirmed and you can proceed to further diagnostics of the fuel line.

Ignition coil problems