Chainsaw Shtil 180 Stalls at Idle
The chainsaw stalls at idle speed: owners of this tool probably encounter this problem. By its design, the saw is a fairly lightweight tool. However, there are times when it breaks. The main problem in troubleshooting is determining the correct cause of abnormal operation .
Once the cause is identified, eliminating the defect is usually quite simple. Circuit diagram of a chainsaw.
Probable reasons for failure
The power unit of all chainsaws is a single-cylinder internal combustion engine. Devices of this type are characterized by such malfunctions as violations of intra-cylinder compression, changes in the fuel mixture ratio, incorrect ignition operation, and low-quality fuels and lubricants. The main problems in the operation of the power unit are the following:
- the engine runs stably at minimum speeds, but stalls when the speed increases;
- the start-up occurs normally, but the idle speed is unstable and stalls quickly;
- won't start.
Electronic ignition circuit for a chainsaw.
Abnormal idle operation can be caused by various reasons. They can be divided into several positions:
Chainsaw Shtil 180 starts and stalls.
- reduced filter capacity (gasoline and air);
- abnormal operation of the ignition system:
- the carburetor settings changed spontaneously;
- malfunction of fuel line elements;
- exhaust channels and muffler are clogged;
- defects of the piston, cylinder, valves.
Repairs should begin with an external inspection and checking the presence of fuel in the tank.
Checking and repairing filters
The engine may run rough or stall if there is not enough fuel or air. Causes: clogged air or fuel filter. To check the fuel filter, you need to remove the fuel line hose from the carburetor fitting and direct it into a container. Then press the fuel pump several times. If the fuel is pumped normally, in clearly defined doses, without dirt, then the fuel filter is working properly. If the stream is weak or fuel is not pumped at all, the filter needs to be replaced or, if possible, cleaned.
Clogging of the fuel filter with sawdust is one of the reasons for chainsaw breakdowns.
No spark
If the chainsaw does not start, and you have not experienced any particular difficulties before, the first thing to do is check the spark plug. There may simply be no spark between its electrodes; this can only be determined after removing the spark plug. We check its functionality; to do this, we stick the spark plug into the cap of the high-voltage wire, and place the metal side of the spark plug on the cylinder (or other metal object). Now we do several manipulations with the starter, and if during them no spark is observed, the problem is specifically in the spark plug.
Attention : you must make sure that the ignition is on, otherwise the spark plug will not show a spark in any case. Also, to make sure that it is the spark plug and not the ignition coil that is faulty, take a similar spark plug and check for a spark on it. If present, the problem can be solved by simple replacement.
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Ignition coil malfunction
Repairing the ignition coil is impossible; its design cannot be disassembled. But you can only check the performance of a part with a special device. If there is no spark to the spark plug, do not immediately blame the ignition coil; carry out diagnostics. Some people mistakenly run to the store for a new reel, so first make sure it’s broken and then make a new purchase.
Supplying fuel to the chainsaw
If the Shtil 180 does not start, there is a spark, then first of all we check the presence of fuel in the chainsaw tank. Of course, the problem is funny, but quite common. Next, we check whether fuel is entering the carburetor; to do this, you can disconnect the gasoline hose from the carburetor and pump in gasoline. After several manipulations, gasoline should come out of the hose, but not in a large stream, but in small jerks. If gasoline does not flow or flows poorly, the problem may be the following:
The fuel supply channel is clogged;
The fuel filter is clogged directly.
Read the article that describes why gasoline does not flow into the chainsaw. The described tips apply to Shtil 180.
As unusual as it may sound, even a too full fuel tank can cause this. If the pressure is high, the fuel hose may be squeezed out or the required vacuum may not be created. Be sure to monitor the quality of the fuel used; for proper operation, never leave the chainsaw with gasoline for more than 2 weeks. Long-term storage of fuel in the tank contributes to the creation of resins and the process of polymerization of components.
Faulty crankshaft bearings
If the Shtil 180 does not start and the fuel flows correctly, you will have to look further, namely into the crankshaft. Its bearings tend to wear out, which causes play to appear when you try to shake the flywheel. The fact is that in the presence of backlash, the flywheel magnets are attracted to the ignition coil, or rather to its contacts.
Repairing and replacing bearings requires disassembling the engine, so this work should only be performed by skilled workers or people with experience. You should not disassemble the engine if this is your first time.
Floods the spark plug
In some cases, the Shtil 180 starts and stalls, or does not start at all. Then we check the condition of the spark plug; it may be flooded. There can be two reasons for this “overflow” - improper starting of the engine when cold and a malfunction of the carburetor. We are trying to solve the problem with the following steps:
Remove the spark plug;
We turn the chainsaw over to the other side and wait until the excess fuel flows out;
To be sure, we pull the starter several times, so that gasoline will certainly come out of the cylinder;
We return the spark plug to its place, install the cap and try to start the engine again with the starter.
Saw Calm Stalls at Idle
For what reasons does Shtil 180 stall at idle or full throttle?
Any tool can break and the Stihl MS 180 chainsaw is no exception. Now let’s try to understand questions such as: why does the chainsaw stall when the speed increases, also at full idle. Let's look at options for diagnosing and eliminating defects associated with this behavior of the Shtil 180 chainsaw.
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Why does a chainsaw stall when you press the gas?
Let's say the chainsaw operates normally at idle, but when you press the gas sharply it stalls. What is the possible reason? It’s immediately clear that the problem is not the ignition (lack of spark), because if the ignition was faulty and there was no spark, the tool simply would not start. This means the fuel system remains.
There are many defects in the fuel accounting system to determine a clear reason why the chainsaw is calm
180 stalls when you press the gas, you need to carry out a full diagnosis of it. We advise you to read about the most common malfunctions of the Shtil 180 chainsaw and the elimination of these defects.
Filter check
The first thing you need to check is the fuel filter.
Sometimes, a filter clogged with dirt is unable to pass through the fuel mixture in sufficient quantities. Accordingly, a lack of fuel appears in the system, which leads to the fact that when you press the gas of the chainsaw, the fuel burns out, and new fuel does not yet have time to arrive under the influence of which the Shtil chainsaw stalls. Also, if the fuel filter is clogged, there may be a noticeable drop in the power of the chainsaw at high speeds, but this is with minor contamination.
Air filter
On the Internet pages, you can easily find information that the Shtil
The 180 may
stall
due to severe contamination of the air filter.
I would like to refute this incorrect information and say that the Shtil MC 180 carburetor is equipped with a compensator, which is designed and installed to take in the air necessary for the normal operation of the Shtil
180 chainsaw, bypassing the dirty air filter. This power with a clogged air filter will not drop much, alas, it will definitely not stall. The power may also drop due to piston wear; here the Stihl MS 180 piston chainsaw will need to be repaired.
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Carburetor
One of the reasons why a chainsaw does not develop speed when you press the gas, but rather stalls , is a malfunction of the carburetor. Let’s say the Shtil 180 saw worked properly, but at the end it was installed for a long time and was not even used. After starting it, it works fine at idle, but when you press the gas it can stall. Why does it stall? The reason is a stuck carburetor valve nozzle. This is not 100%, but the possibility of such a malfunction is extremely high. We recommend reading the article about the design and repair of the Shtil 180 carburetor.
To check the injector, you need to remove the carburetor and disassemble it. To remove, you need to unscrew the two nuts securing the air filter and the carburetor, then remove the air filter and the engine control lever, while disconnecting the air damper control rod from the carburetor. Next, you need to slightly pull the carburetor towards yourself and disconnect the fuel supply hose.
The saw calm stalls at idle.
It is necessary to very carefully remove the fuel hose and prepare a plug for it in advance, since fuel must flow with its use.
Having removed the carburetor, it must be blown out and cleaned of dirt, only after which the carburetor must be untwisted.
General information
The characteristics of this saw are a source of pride for the German manufacturer. At the same time, the unit is a tool that is designed to perform a small amount of work. The tool is positioned for domestic use, which confirms the intensity of its use, which should not exceed 20 hours per month . Having such a unit at your disposal, it will not be difficult for you to maintain order in your garden, prepare firewood for the winter, and also 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.
Main characteristics
The saw in question can be considered a compact option, because its weight is only 3.9 kg. At the same time, it has a large capacity oil and fuel tank. The device performs its operating functions using a two-stroke engine, the power of which is sufficient to solve simple tasks. In addition to this, during operation this tool does not create much noise, the level of which does not exceed 98 dB . For ease of understanding, it is enough to say that human speech creates noise at a level of 76 dB.
- The Stihl 180 chainsaw has a power of 2.6 watts. In principle, this is enough, remembering that we are talking about a tool for household use.
- The capacity of the oil tank is 0.145 l, the fuel tank is 0.25 l.
- The tire provided by the design has dimensions of 350 mm, with a pitch of 0.325 inches.
Winding device
As with other saws, the carburetor plays the role of the main starting device. Looking in more detail at the carburetor that the Stihl 180 chainsaw is equipped with, it should be noted that it has a single adjustment screw. In other words, it is a kind of idle adjustment screw . In this case, the jet, which bears the full load, is motionless all the time.
In other words, the regulation is not applicable to him. In turn, there is no way to influence the full load in any way. You also need to pay attention to the factory settings, due to which the air-fuel mixture is supplied directly to the engine. Moreover, this principle remains unchanged regardless of the operating conditions of the tool.
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The main reasons for chainsaw failure
Although the chain saw is a simple device, from time to time problems arise in its operation, which can only be eliminated by disassembling it. Examples include the following faults:
- the chainsaw does not gain speed;
- the chainsaw stops functioning when cutting;
- the chainsaw starts and stalls;
- the chainsaw loses its power;
- The chainsaw stalls when pressed.
Most often, malfunctions are associated with interruptions in the functioning of the motor, as well as with malfunctions of other systems and components. Proper handling of this equipment is of great importance. If 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 chainsaw and finish with the most complex.
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 tanks with combustible mixture and oil is controlled, and the device is securely fixed in the hands. Shtil chainsaw is repaired
.
Idle speed adjustment
Before setting up, carry out maintenance of the tool. To ensure that the idle speed adjustment is effective, preventive measures are taken:
- carburetor cleaning;
- engine flushing;
- cleaning the air filter;
- warming up the engine.
To adjust the operation of the mechanism at idle speed, use the appropriate adjusting screw. Its rotation depends on the required setting:
- During standard adjustment, the screw is turned counterclockwise until it turns tightly. After this, make 2 circles in the direction of the arrow.
- If the saw operates at low speeds, then turn the screw clockwise until the chain begins to move. Then make half a circle in the opposite direction.
- At high frequencies, the regulator is turned counterclockwise until the circuit stops. After this, the rotation is continued another half turn in the same direction.
It will not be possible to adjust the idle speed if there is air leakage into the engine through the gasket, acceleration pump, seals, or for another reason.
READ How to Disassemble a Stihl 180 Chainsaw
Checking the main chainsaw systems
If the chainsaw refuses to work normally, you need to make sure that all the conditions required for its normal functioning are provided:
Then you need to sequentially check the functioning of all its elements. First you need to check the fuel tank. If the reason is not the volume or quality of the fuel, then the likely cause of the malfunction may be the spark plugs. The spark plug gap should not exceed 0.5 millimeters. If it is too small, this means that carbon deposits have deposited on the candles. In this case, you should remove the spark plugs, clean them, then put them back in place and try to start the chainsaw. In addition, it is advisable to completely replace the spark plugs with new ones from time to time, even if they are in good condition.
Then you need to check the condition of the fuel filter and carburetor. Cleaning the fuel filter yourself is not a difficult task, but carburetor repair is best left to specialists.
Checking and repairing filters
The engine may run rough or stall if there is not enough fuel or air. Causes: clogged air or fuel filter. To check the fuel filter, you need to remove the fuel line hose from the carburetor fitting and direct it into a container. Then press the fuel pump several times. If the fuel is pumped normally, in clearly defined doses, without dirt, then the fuel filter is working properly. If the stream is weak or fuel is not pumped at all, the filter needs to be replaced or, if possible, cleaned.
Clogging of the fuel filter with sawdust is one of the reasons for chainsaw breakdowns.
The device must be removed from the fuel tank (after draining all the fuel from it). On most models, the fuel filter can be pulled out with a wire hook through the neck. If the filter design is dismountable and can be cleaned, it must be disassembled and washed in accordance with the manufacturer’s recommendations. Otherwise, replace it with a new filter.
Similar problems can arise when the air filter is clogged with dust, sawdust, or dirt. If there is insufficient air, the fuel mixture will be enriched and the fuel combustion process will be difficult.
To check, remove the filter. During operation, precautions must be taken to prevent dust from entering the carburetor. The device must be cleaned and rinsed in warm water with added detergent. After drying, if possible, blow with low-pressure compressed air and reinstall. If the chainsaw works normally, then the cause has been eliminated; if not, you need to look further.
If the tool is used continuously, it is recommended to replace the filters of the fuel and air systems after 3 months.
One of the reasons why a chainsaw does not develop speed when you press the gas, but rather stalls , is a malfunction of the carburetor. Let’s say the STIHL 180 saw worked properly, and then it was installed for a long time and was not even used. After starting it, it works fine at idle, but when you press the gas it can stall. Why does it stall? The reason is a stuck carburetor valve nozzle. This is not 100%, unfortunately the possibility of such a malfunction is extremely high. We recommend reading the article about the design and repair of the STIHL 180 carburetor.
In order to check the nozzle, you need to remove the carburetor and disassemble it. To remove, you need to unscrew the two nuts securing the air filter and the carburetor, then remove the air filter and the engine control lever, in this case disconnecting the air damper control rod from the carburetor. Next, you need to slightly pull the carburetor towards you only and disconnect the fuel supply hose.
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It is necessary to very carefully remove the fuel hose, and prepare a plug here in advance, since with its use fuel must flow.
Having removed the carburetor, it must be blown out and cleaned of dirt, only after a while the carburetor must be untwisted.
You need to unscrew the cover of the main chamber of the carburetor; this is the one on which the compensator is installed on top. Next, use an 8 mm bolt and a length of more than 50 mm. We knock out the valve.
You need to knock out the valve by placing the carburetor on a wooden stand, this will protect it from damage to the body.
If the nozzle is removed, of course, blow it out with a compressor. The valve must allow air to flow exclusively in one direction; if, of course, the valve is free to blow in both directions, it means it is faulty and needs to be replaced with a new one. If the valve has been repaired, you must reassemble the chainsaw in the reverse order of disassembly.
To see clearly how a carburetor is repaired, or more precisely, how to correctly knock out the injector valve from the carburetor body, of course, watch the video.
The next common reason why a saw may stall when the speed increases is air leaking into the carburetor. You can check this only with a special tool, but it is worth seeing that if preventative work on the carburetor has not been carried out for more than one year, then you can install a new set of gaskets in the carburetor. Sometimes this helps solve the problem of its depressurization.
When disassembling the carburetor to change the gaskets, you need to closely examine its needle valve, press on the rocker arm and check its lifting. From time to time, especially when the STIHL chainsaw has been standing for a long period with fuel in the carburetor, the needle may burn to the carburetor body and not even do its intended purpose. Simply put, the needle valve will not allow the fuel mixture to pass through. Then the saw doesn't work.
Stihl ms180 chainsaw stalls at idle (eliminating the cause)
The first and most common cause of this malfunction is incorrect carburetor adjustment. You can adjust the idle speed yourself; for this purpose you need to have a STIHL adjusting screwdriver, which is supplied with the unit. The adjustment hole is located on the right side of the STIHL 180 saw on the handle and is marked with “-” and “”.
If chainsaw does not maintain speed and stalls at idle, you can be virtually 90% sure that it has a malfunction in the fuel pump operating system, usually this is air leaking into the crankcase through the pan gasket, as it is also called, which is much more often, through the seals crankshaft. The air suction reduces, as it is also called, and generally completely stops the impulse, which is supplied through special channels to the fuel pump of the chainsaw. Upon completion of this, the STIHL 180 chainsaw does not receive the required amount of fuel and stalls at idle.
help. When the chainsaw works under load for 10 seconds, then the speed drops sharply for a second and then it runs again for 2-5 seconds and then the speed drops again. I disassembled the carburetor, blew everything clean, the filter is also clean, both air and fuel. When cold, it starts normally.
Jpeg wrote: I ask for advice. STIHL ms 180 stalls at idle. When you release the gas lever, it first smoothly drops the speed, then it starts to work unstably with twitching, and then after an indefinite amount of time it stalls. After this it is difficult to start. If you give it gas, it's better! If you put the saw on its side (on any side), the idle speed increases almost to the point at which the chain begins to spin along the bar and the saw does not stall. What can give such an effect? What I have already done: replaced the spark plug, cleaned the air filter to perfection, installed a new gas filter. I went through the entire saw, looked at all the areas where there could be air leaks, checked the gas hose for leaks, disassembled the carburetor and blew air from the compressor, and checked the condition of the membranes. They are intact, slightly stretched. Changed the crankshaft seals. I installed them on Permatex sealant. I tried to start it without the top cover, bypassing the air filter completely. Opened the gas tank while the saw was running. Nothing helps. What points attracted attention: there are burrs on the cylinder and piston, but not very deep. The mounting hole of the air damper axis is broken because someone before me lost the lock washer. There is about half a millimeter of play. The throttle valve sits rigidly. The spark plug quickly becomes clogged with soot when idling. And in general, compared to the Husqwarna 137, gasoline is consumed two times faster. It seems like the carb is getting rich. Where else can you go, what can you see? Or, after all, the whole problem is in bullies.
you need to look for what causes the bullies - they appear in this device for a reason
The chainsaw stalls at idle speed: many owners of this tool face this problem. In terms of its design, the saw is a fairly simple tool. But there are times when it fails. The main problem in troubleshooting is determining the correct cause of abnormal operation. Once the cause is identified, eliminating the defect is usually quite simple.
The chainsaw starts and stalls - the reason
If the chainsaw starts and stalls during 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, measure the oil level. If the amount of lubricant is sufficient, then the reason may lie in the tube that leads it to the lubrication mechanism.
Another reason could be a carburetor failure. If it only needs adjustment, you can do it yourself according to 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 chain saw stalls when tilted, since the remainder of the fuel mixture ends up in the part of the tank opposite to the place where the suction tube is located.
Why does a chainsaw stall when heating up?
It often happens that the chainsaw starts when cold, but stalls when it warms up. This behavior of the tool can be caused by the following reasons:
- The carburetor is not adjusted correctly. This problem can be identified by how the device starts up when cold. If it is carried out without closing the air damper, and the engine starts without a preliminary flash, this means that after the engine warms up, fuel floods the spark plug. The solution to this problem is to adjust the carburetor. Details about carburetor adjustment
- Malfunction of the coil (ignition module). This problem can be identified by sequentially checking the spark, first on a cold and then on a hot engine. If there is no spark on a hot engine, then you need to replace the ignition coil.
- Spark plug faulty. In this situation, as in the case of a faulty ignition module, the spark disappears when the engine heats up. You need to replace the spark plug with a new one, and if this does not solve the problem, you should check the ignition module and the distance between it and the flywheel.
Why does a chainsaw stall under load?
Sometimes the chainsaw is unable to function properly under load. Most often this is caused by improper adjustment or leaking carburetor. In addition, the cause of this problem may be air leaks through the carburetor gasket or crankshaft oil seals. A tool that is unable to function under load will also not be able to reliably maintain idle speed.
Diagnostics begins with checking the carburetor and crankcase for leaks. If air leaks through the crankshaft oil seals are detected, they must be replaced. If air leaks are detected in the carburetor, installing a repair kit of gaskets is required to solve the problem.
If these actions do not lead to the desired result and the engine crankcase and carburetor are sealed, then you need to adjust the carburetor.
If a Husqvarna chainsaw stalls under load, then in case of any deviations in the functioning of the motor, you should first of all check the impulse hose, since this is the most common cause of failure of chainsaws of this brand.
The main reasons why the Shtil chainsaw does not start and how to eliminate them
German saws STIHL ( Shtil ) have long established themselves as high-quality and reliable cutting tools. For various needs, the company offers a wide range of models:
- Low-power chainsaws for working in the garden or in the country for pruning bushes and felling trees with a small diameter trunk, preparing firewood: MS 170 (1.3 kW), MS 211 (1.7 kW), MS 230 (2 kW) and others.
- Medium power chainsaws, ideal for farmers, gardeners and construction workers: MS 271 (2.6 kW) and MS 310 (3.2 kW).
- Super-powerful saws with a gasoline engine, characterized by high performance and suitable for all industrial and economic work related to the processing of wood of various hardnesses: MS 361 (3.4 kW), MS 361 (5.2 kW) and others.
- Electric and battery-powered saws that do not require fuel to operate, but are also perfect for working in small gardens: for example, MSE 250 CQ or MSA 220 CB (with AP 300 S and AL 500).
A lightweight and compact model of the tool is used for household purposes, but, despite the optimized performance, sometimes
Shtil
chainsaw . Problems manifest themselves in the fact that the engine starts and stalls, is unstable, cannot develop the required power, or suddenly gains high speed.
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Full speed ahead
Sometimes the engine stalls after normal operation. To establish the cause, pay attention to the accompanying circumstances:
- The engine stalls in the middle of operation for no apparent reason. The starter is in a stationary position and does not turn. This means that the tool is jammed and requires urgent repair.
- During normal operation, power decreases in a short time and the engine stops, the cylinders are overheated. The situation indicates an air leak under the rubber pipe between the carburetor cylinder, possibly due to a rupture. The air becomes depleted of fuel; the pipe needs to be replaced.
At idle
Violation of the functionality of the fuel unit system leads to air leaks. In this case, the unit stalls at idle and does not maintain its number. Additional suction reduces the air impulse to the fuel pump and passes through the sump membrane or crankshaft seals. Diagnostics is done with a vacuum gauge.
Stopping the engine when cold occurs for other reasons:
- the spark plug channel contains an excess amount of combustible mixture;
- the gap between the tip of the spark plug and the high-voltage cradle is not adjusted;
- power supply failure.
Check the seals by pouring gasoline into the crankcase; the leak is visible visually. This means that the engine does not operate at idle speed, and at high frequencies, leaky oil seals will lead to bearing jamming. If elements leak, they are replaced with new ones and sealed.
What to do if the chainsaw stalls when you press the gas
One of the most common questions regarding the operation of this device is: why does the chainsaw stall when you press the gas and what needs to 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.
How to start a chainsaw correctly?
As much as we would like, the human factor is often the very cornerstone that acts as the source of many technical problems, which it then heroically eliminates. The same is true with a chainsaw, which must not only be used and stored correctly, but, oddly enough, even started.
All models of chainsaws have their own characteristics, but usually their assembly and startup schemes are very similar. Let's consider step by step where to start your acquaintance with the saw and how you can put it into operation.
Study the operating instructions, paying attention to the start and stop mechanism, which usually receive special attention; Lower the adjustment lever down, first squeezing the gas; Pull the starter handle sharply until the ignition starts, after which the adjusting flap is moved to the upper position; Resume starting the starter without stopping it until the system starts; Press the gas once and immediately release, warming up the instrument; Lock the lever in the 1st position; Turn on the motor with the highest damper position
Source: sadovij-pomoshnik.ru
Why does the chainsaw not pick up speed and stalls?
If the saw cannot gain speed or stalls when you press the gas, then most likely this is not caused by a leak in the carburetor or crankcase. This problem can be resolved 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 does not enter the engine, as a result of which it cannot gain speed or stalls. If you stop the chainsaw, open and close the fuel tank and turn it on again, it will work normally for about five minutes, and then again stop picking up speed or stall.
Another possible reason that the chain saw is not able to gain speed may be excess carbon deposits in the muffler, which makes it difficult for exhaust gases to escape, which reduces engine power and speed.
