German STIHL saws (Calm) 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 trimming shrubs and felling trees with a trunk of a small diameter, cutting 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 builders: 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 hardness: MS 361 (3.4 kW), MS 361 (5.2 kW) and others.
• Power saws and battery powered saws that do not need fuel to operate, but are also great for working in small gardens: for example, MSE 250 CQ or MSA 220 CB (with AP 300 S and AL 500).

The light and compact model of the tool is used for domestic purposes, but, despite the optimized performance, sometimes the Stihl chainsaw does not start. Problems manifest themselves in the fact that the engine turns on and stalls, is unstable, cannot develop the required power, or suddenly gains high speed.

Why the Stihl chainsaw does not start

For a preliminary diagnosis of the causes, they check the operation of the fuel pump, the appearance of the candle, the flow of fuel, the functionality of the carburetor and the condition of the filter. Pay attention to the performance of cylinders, pistons, muffler, crankshaft bearings. After preventive measures, they try to start the chainsaw. Insufficient lubrication of rubbing parts also becomes a factor in poor performance.

In this article, we will look at the main problems that may occur when starting a Stihl chainsaw (the spark has disappeared, the tool stalls or does not gain momentum), as well as ways to eliminate them.

No spark

Checking for spark at the spark plug. Various factors affect the functioning of the element. When testing the mechanism, the reasons are revealed:

• insufficient adjustment of the carburetor;
• large oil in gasoline;
• clogged fuel and air filters.

Due to work in such conditions, soot accumulates on the contacts of the candle. Subsequent corrosion of the conductors causes no spark in half of the faults. This is because the gap between the modular contacts changes. To check for spark, do the following:

• the tip of the high-voltage cable is removed;
• the candle is unscrewed;
• the tip is put in place;
• the candle is leaned with the wide end against the cylinder;
• start the starter.

If at start-up a bright spark appears between the electrodes, resembling lightning, then the ignition unit is working. In the absence of a flash, they clean the entire element and set the gap between the conductors. Sometimes there is no gap between the flywheel and the ignition coil. When the flywheel is rubbed, scratches are visible on its exterior.

Ignition coil failure

The module or coil is not disassembled and its suitability is difficult to determine without testing fixtures. Modern ignition systems are strong, light and small in size. They are characterized by almost trouble-free functionality. Problems with a chainsaw malfunctioning due to an ignition coil can be fixed on your own.

Test the outgoing wires for damage (including internal ones) that occur due to vibration leading to friction. If no cracks are found, then the ignition coil needs to be replaced. Sometimes a module malfunction is indicated by a weak, barely perceptible flash when the saw heats up. This is due to an increase in the temperature of the coil, which leads to an increase in the resistance of the transistor.

The peculiarity is that at the beginning of work a spark may appear, but after prolonged use it becomes dull and disappears. Modern ignition coils are not repaired in a home workshop, therefore they are replaced with suitable elements.

Fuel supply

After unscrewing the candle, a wet coating is found on its surface. This indicates an excessive supply of gasoline to the combustion chamber. For this reason, the tool does not work or stalls, because the fuel does not ignite.

Another inhibitory factor is the clogging of the breather - a small hole in the gas tank cap. It is cleaned with a needle, otherwise the Stihl MS 180 chainsaw will not start. To determine the incorrect fuel supply, sequential actions are carried out:

• remove the candle;
• 2 cubes of gasoline are poured into the hole of the candle with a syringe;
• put the ignition device in place and put on the cap of the high-voltage wire;
• the lever is moved to the hot start position;
• pull the starter handle a couple of times.

If the tool starts and immediately stalls, then the fuel line is tested further. Check the gasoline filter, the splash from the crankcase, the integrity of the baffle in the pump when the cap is unscrewed.

Crankshaft bearing failure

If the bearings are defective, a slight play is felt. To identify it, the flywheel of the Stihl MS 180 saw is staggered from one side to the other. The movement indicates that the flywheel is shifted towards the electrodes by its own magnets, as a result of which there is no spark. To remove the mechanism, the cutting element is dismantled, the filter cover and clutch are removed. For the crankshaft stopper, remove the manual starter cover and tighten the two bolts.

The clutch is unscrewed with a key clockwise. They remove the drum with an asterisk, change the old clutch and twist it all the way. The crankshaft is stopped so as not to break the starter. The mechanism is assembled in the reverse order. To tighten the brake handle is tilted forward, the tool is started, then removed from the brake.

Less often, defective bearings are detected (the diameter of the holes in the cage is increased). To determine, disassemble and measure with a micrometer. Regular knocking indicates broken bearings. In this case, urgent repairs are required, because if the integrity of the crankshaft is violated, the piston group and cylinder will fail.

Fills the spark plug

In this case, the spark is not able to ignite the fuel, which in large quantities enters the furnace to burn the combustible mixture. If it fills the candle, then the carburetor is faulty or the cold engine does not start correctly. The engine is purged, the procedure is performed with the ignition off and away from an open flame. To ensure the ignition of the fuel at the time of start-up, clean the mechanism:

• unscrew the candle, wipe dry, dry for half an hour;
• a large layer of soot is removed with a needle file;
• adjust the gap between the contacts;
• the tool is turned upside down and gasoline is drained;
• in this position, the starter is pulled several times (to remove fuel residues);
• reassemble in reverse order.

Saw Stihl stalls at idle

For what reasons Stihl 180 stalls at idle or full throttle

Any tool can break and the Stihl MS 180 chainsaw is no exception. Now let's try to figure out such questions as: why the chainsaw stalls with an increase in speed, also at idle at full speed. Let's consider the options for diagnosing and eliminating defects associated with this behavior of the Stihl 180 chainsaw.

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Why chainsaw stalls when you press the gas

Let's say the chainsaw is idling normally, but when you press the gas sharply, it stalls. What is possibly the reason? It’s immediately clear that it’s not about ignition (lack of spark), because if the ignition fails and there is no spark, the tool would simply not start. This means the fuel system remains.

There are many defects in the fuel accounting system to determine a clear premise, which is why the chainsaw is calm

180 stalls when you press the gas, you need to carry out a complete diagnosis of it. We advise you to read about the common malfunctions of the Stihl 180 chainsaw and the elimination of these defects.

Filter check

The first thing to check is the fuel filter.

Sometimes, a clogged dirt filter is unable to pass the fuel mixture through it 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 the new one does not have time to arrive under the influence of which the Stihl chainsaw stalls. Also, when the fuel filter is clogged, there may be a noticeable drop in the power of the chainsaw at the highest speed, but this is with minor pollution.

Air filter

On the pages of the Internet, you can easily find information that the Stihl

180 may
stall
due to heavy contamination of the air filter.
I would like to refute this incorrect information, and say that the Shtil MS 180 carburetor is equipped with a compensator, which is designed and installed in order to take in the air necessary for the normal operation of the Shtil 180 chainsaw, bypassing a dirty air filter
. This power with a clogged air filter will fall a little, alas, it definitely will not stall. More power may fall due to piston wear, here it will already be necessary to repair the Stihl MS 180 piston chainsaw.

READ Replacing Fuel Hose On Stihl 180 Chainsaw

Carburetor

One of the circumstances due to which the chainsaw does not develop speed when you press the gas, but rather stall , is a carburetor malfunction. Let's say the Stihl 180 saw worked properly, and at the end it was put on for a long time and did not even use it. After it was started, while at idle it works fine, and when you press the gas it can stall. Why is it deafening? The reason is a stuck carburetor injector valve. This, this is not 100%, but the possibility of such a malfunction is the highest. We advise you to read an article about the device and repair of the Stihl 180 carburetor.

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, while disconnecting the air damper control rod from the carburetor. Next, you need to pull the carburetor a little towards yourself personally, and disconnect the fuel supply hose.

Stihl saw stalls at idle.

It is necessary to remove the fuel hose very carefully, and prepare a plug for it in advance, since fuel should go with its use.

Having removed the carburetor, it must be blown and cleaned of dirt, only after which the carburetor, of course, should be untwisted.

You need to unwind the cover of the main chamber of the carburetor, this is the one with the compensator installed on top. Further with the help of an 8 mm bolt and a length of more than 50 mm. We knock out the valve.

Repair STIHL MS 180 / disassembly and assembly of the carburetor / stalls at idle

Chainsaw Stihl

MS 180 has some aspects that make owners worry, and is spent on expensive.

You need to knock out the valve by installing 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 pass air only in one direction, if there is an option to freely blow the valve into both states, then it is faulty and you need to change it with a new one. When the valve is repaired, the chainsaw must be assembled in the reverse order of disassembly.

READ Motoblock stalls at idle

You can see clearly how the carburetor is being repaired, or more precisely, how to correctly knock the nozzle valve out of the carburetor body by watching the video.

The next common reason why the saw may stall

as the rpm increases, air is sucked into the carburetor. You can check this only with a special tool, alas, it is worth seeing that if preventive work with the carburetor has not been carried out for a long time, then you can install a new set of gaskets in the carburetor. Sometimes this helps to solve the problem with its depressurization.

When disassembling the carburetor to replace the gaskets, it is necessary to closely examine its needle valve, press on the rocker and control its lifting. When, especially if the Stihl chainsaw has stood for a long period with fuel in the carburetor, the needle may burn to the carburetor body and not do its job. Simply put, the needle valve will not let the fuel mixture through. Then, the saw doesn't work.

Why does it stall at idle

The first and most common cause of this malfunction is incorrect carburetor adjustment. There is an option to adjust the idle speed without the help of others; for this purpose, you need to have a Stihl adjusting screwdriver, which comes 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 "".

Diagnosis can be carried out using a special device called a vacuum gauge.

The 2nd method to check the performance of the oil seals is to pour gasoline into the engine crankcase and see if the oil seals let gas through, which means they are to provide normal pressure in the crankcase, which will make idling unfeasible. And while working at high speeds, with leaky oil seals, there is a possibility of jamming of the crankshaft bearings.

Method for checking the crankcase and seals Stihl

180 per density following:

1. The top cover is removed.
2. The air filter housing and carburetor are dismantled.
3. The chainsaw handle is removed.
4. The starter is untwisted and removed.
5. On the opposite side of the starter, the side cover and the drive sprocket are removed.
6. A piston stopper is installed in the candle hole; otherwise, a cord from an old starter with knots imposed on it is stuffed into the cylinder.
7. The flywheel and clutch are unscrewed, then the parts are removed. It is worth knowing that the chainsaw clutch has a left-hand thread and unscrews clockwise.
8. Remove the oil pump drive gear.

READ Chain Saw Electric Or Gasoline Which Is Better

Having disassembled the Stihl MS 180 chainsaw, you can meet oil seals, after which you need to fill the crankcase with gasoline and check for leakage. Fill the crankcase, there is an option through the fuel window in the cylinder, for this purpose the piston must be raised very high. If leaks are found, you need to change the defective seals, or re-sealing the pan. There is an option to assemble Stihl 180 following the reverse sequence of the method.

Why does it stall at full speed

Often we hear the question of why the chainsaw stalls at full speed. There may be several circumstances. Everything, it is necessary to take into account how exactly the saw stalled. Suppose the tool worked normally and suddenly, without any apparent circumstances, it abruptly stalled and at the same time the starter does not turn. Under these circumstances, there is an option to be 100% sure that the chainsaw is jammed and it is necessary to start serious repairs.

The second situation is when the Stihl 180 chainsaw worked normally, then evenly lost power and stalled over a short time, while overheating of the cylinder is observed. Then, most likely, the reason is air leakage under the rubber pipe connecting the carburetor to the cylinder or its rupture. The mixture was lean, and as a result, overheating appeared. There is an option to remove the cause by changing the pipe.

Conclusion

If the Stihl MS 180 chainsaw stalls at idle, does not gain power when you press the gas, or generally stalls at full speed, you need to carry out fuel diagnostics that allow you to keep accounting (software) and inspect the crankcase for density. To do this without the help of others, of course, but you need to have certain abilities. If you are not familiar with two-stroke saws, it is better to turn to specialists, because this technique is quite capricious and any mistakes are expensive.

Source

Chainsaw Stihl stalls: reasons

If the tool turns off immediately after starting, it means that some device or part has failed. To determine the cause, the mechanism is tested independently or in service workshops. Sometimes the reason that the mechanism does not start well is improper maintenance of the saw:

• insufficient amount of gasoline;
• poorly prepared fuel mixture;
• poor quality lubricant;
• muffler clogged with combustion products;
• unadjusted carburetor;
• obstruction of the air filter;
• piston or cylinder failure.

When you press on the gas

Sawing units are idling, but the chainsaw stalls when the gas is pressed, as the load increases. The tool is heated before use by running the engine at idle for a minute. If this is neglected, then the motor stops after pressing the pedal. Other reasons may be:

• clogged or unadjusted combustible fuel mixing unit;
• a clogged air filter does not provide the desired air flow with increasing load;
• a dirty gasoline filter does not allow the required amount of the mixture to pass through;
• the cylinder wall and piston rub.

Low octane fuel causes a brake, because this circumstance prevents the engine from reaching the required power when the load increases.

At idle

Violation of the functionality of the fuel unit system leads to air leakage. In this case, the unit stalls at idle and does not hold their number. Additional suction reduces the air impulse to the fuel pump and passes through the sump membrane or crankshaft seals. Diagnosis is made with a vacuum gauge.

The shutdown of the engine on a cold occurs for other reasons:

• the candle channel contains an excess amount of combustible mixture;
• between the tip of the candle and the high-voltage cradle the gap is not adjusted;
• power supply failure.

The seals are checked by pouring gasoline into the crankcase, the leakage is visible visually. This means that the engine does not idle, and at high frequency, leaky seals will lead to jamming of the bearings. In case of leaking elements, they are replaced with new ones and sealed.

At full speed

Sometimes the engine stalls after normal operation. To determine the cause, pay attention to the accompanying circumstances:

1. The motor stalls in the middle of work 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.
2. During normal operation, 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 gap. The air depletes the fuel, the pipe needs to be replaced.

Not gaining momentum

Many mechanisms of the mechanism are involved in the launch, so the loss of speed of the Stihl chainsaw after idling can be the result of various factors. Confident idling and interruptions in the motor under load can occur for the following reasons:

• development of an engine resource;
• wear, deformation and corrosion of the piston group;
• faulty ignition coil or spark plug;
• unbalanced carburetor screws.

If the tool does not develop speed, then the conductivity of the hole in the fuel tank cap is broken. The occurrence of a vacuum does not provide the required amount of fuel, because the engine does not gain the required power. Turnovers decrease with the accumulation of carbon monoxide in the muffler, the removal of gases from combustion is difficult.

Doesn't slow down

The tool quickly reaches the maximum speed, and the power does not decrease. This situation is explained by the fact that:

• the throttle valve does not work due to the weakening of the spring or the traction element;
• the switching toggle switch periodically fails;
• no corkscrew on the throttle axis;
• clogged carburetor;
• the fuel hose and gasoline filter are not functioning properly.

Calm 180 stalls when you press the gas

Hello dear subscribers and readers of my blog! Online Andrey Noak. We continue the theme of chainsaws. What you need, I already said earlier that what should be inspected in a chainsaw in order to know the cause of its malfunction. I will now move on to more valuable indications so that you do not find the cause of the difficulty for a long time and know approximately how to solve it. A chainsaw is not a very difficult tool, alas, it must be properly looked after. There are various cases when the chainsaw stalls when you press the gas, from time to time under load, and when it does not idle at all. Let's look at different situations together and try to find the right solution.

If you find that the tool does not start at all and stalls, then do not rush to the service center right away, of course, try to solve the problem yourself.

We check each system in turn:

1. Fuel tank. You don't have enough fuel there or it's bad.
2. The next one to be checked is the spark plug and the high-voltage wire. Pay attention, the gap of the candle normally does not exceed half a mm.
3. If the items listed above are tested and work correctly, we move on to the carburetor and fuel filter. With a breakdown of the carburetor, you should contact the specialists.

READ Saw Calm Isn't Gaining Momentum

When the saw stalls at idle, and a frequent cause of failure is a clogged muffler. There is an option to simply clean it without the help of others, for this purpose you do not need the highest specialist.

Apart from cleaning, there is an option, but with its help we handle it very carefully so as not to harm the internal parts of the device.

To adjust the carburetor, you need to find two bolts with the signs L and H. The latter must be turned, just a little, only half a turn. He is responsible for the revolutions of the tool, if necessary, he will raise the idle speed.

Often massive chainsaws stall from the load. Most likely your fuel filter is clogged and needs to be replaced. If this does not help, then it is necessary to check the quality of the fuel consistency and prepare a new one.

Repair STIHL MS 180 / disassembly and assembly of the carburetor / stalls at idle

Localization of problem areas:

It is not uncommon for filters to become clogged, especially when the chainsaw is operated virtually once a day. The air filter is an option to disconnect and rinse under running warm water. Dry thoroughly before inserting into place.

READ Run-in Chainsaw Stihl 250

If, after disconnecting the fuel hose from the carburetor, no liquid flows out with its use, it means that it is clogged. It can be cleaned or replaced with a new one.

With frequent use of the tool, the gasoline pump may fail. Each item has its own expiration date. It should be replaced, as it is also called, contact the service center.

The fuel pipe is located horizontally on the bottom of the tank, if the tool is tilted, then the fuel will not be able to completely cover it. Specifically, this is a prerequisite for the chainsaw to stop working when tilted, because the tube levitates in the air and does not receive the necessary amount of consistency.

If you saw that the chainsaw starts easily without warming up, and stalls after warming up. And do not start it until it cools down, then there may be a few troubles.

That's it, you somewhere, of course, have a leak in a hose, stuffing box or gasket. When, inspect the muffler for carbon deposits. The 3rd reason is the cylinder-piston group (CPG), whether there are any scoring or irregularities.

Carburetor adjustment is required from time to time. Another important prerequisite for a malfunction is the ignition coil. In cases where it burns out, the spark disappears, as it is also called, it becomes very weak, which is not enough to ignite the fuel mixture.

READ Stihl 180 Chainsaw Complete Assembly

There are cases when the master intensively tries the engine, then to a cool, then to a hot one, thereby pumping fuel. Here you need to pull yourself together, transfer the damper to the “hot start” and start the tool evenly. With all this, we bring down the speed to the actual idle level and it warms up for 40-45 seconds.

Chainsaw Stihl. Stalls on gas? One of the reasons.

Here it is necessary to adjust the carburetor and check if there is a massive air leak.

We have already considered the most common cases of chainsaw breakdowns. It remains only to hope that your saw will last without breakdowns. Even such strong models as Calm and Partner there are variations when they fail.

Do not rush to immediately run to the service center, at first use my advice, so you will avoid huge costs of money.

If the article seemed fascinating, share your tips with your friends via social networks. I say goodbye to you. Fortune and see you on the blog!

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What to do

The power tool is operated according to the manufacturer's instructions. Only after checking the chain tension, the unit starts. At the same time, the filling of the tanks with a combustible 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.

How to start a Stihl chainsaw: instructions

The manufacturer of the tool has taken all measures and has developed a manual, thanks to which the mechanism is conveniently started. The user will protect himself from injury if he performs the suggested frequency of actions:

1. The ignition is turned on, and the engine handle is placed in the down position. The intake of the atmosphere from the air filter is blocked by the carburetor damper. To properly start the chainsaw, the throttle diaphragm must be open to enrich the combustible mixture.
2. The lever is set to the start gas position. The starter jerks several times until the first spark appears. If the flash passes, then the tool is ready to start. The mechanism works at high speeds due to the closed throttle membrane. To transfer it to the idling regulation, the gas trigger is pressed and the rhinestone is released. The number of revolutions quickly normalizes.
3. On the Shtil MS unit, the standard configuration does not provide additional devices to start the chainsaw in a lightweight version.

Idle adjustment

Before adjustment, maintenance of the tool is carried out. In order for the idle speed adjustment to be effective, preventive maintenance is done:

• carburetor cleaning;
• washing the engine;
• cleaning the air filter;
• warming up the motor.

To adjust the operation of the mechanism at idle, the appropriate adjusting screw is used. Its rotation depends on the desired setting:

1. With standard adjustment, the screw is turned counterclockwise until it turns tightly. After that, make 2 circles in the direction of the arrow.
2. If the saw is running at low speed, then the screw is turned clockwise until the chain begins to move. Then make a half circle in the opposite direction.
3. At high frequency, the regulator is wrapped against the clock until the circuit stops. After that, the rotation is continued for another half turn in the same direction.

It will not work to adjust idle operation if there is air leakage into the engine through a gasket, acceleration pump, oil seals, or for another reason.

Ignition setting

Gasoline engines are equipped with an ignition system that ignites the fuel. The time the flash occurs affects the operation of the motor. In mass production at the factory, the ignition of the chainsaw is not adjusted. Marks are placed on the corresponding rotating elements, which are combined during adjustment. Incorrect adjustment leads to the fact that the mechanism starts and stalls.

Before adjustment, check the dryness of the candle and the performance of the ignition circuit. The voltage supply cable to the candle is brought to the cylinder with a small gap and the starter is started. In the absence of a flash, test the cable with a probe. Then check the health of the wire to the shutdown button.

If the cables are not damaged, then check the ignition coil. This is done by a special tester to ring the device. In this case, the indicators on the device must match the technical characteristics of the coil, which are prescribed in the instructions for use. If inconsistencies are found, then the ignition unit is changed to a workable device.

The video shows how to quickly set the gap between the ignition coil and the magnet, using a piece of plastic cut from a bottle as a feeler gauge. You can also use an A4 sheet folded in four or a piece of cardboard from a cigarette pack.

The coil can become unusable from vibration when the tool is dropped or hit, so you need to work carefully.

Replacing crankshaft bearings

To begin with, compression is measured, if it is not there, then the reason lies in the breakdown of the piston group.

The required pressure in the cylinder should be 8 atm, if it is lower, then the cylinder and piston, rings, crankshaft bearings may have worn out.

To find out the condition of the piston system, you need to completely disassemble the saw and remove all the main components of the mechanism:

• dismantle the headset, remove the cover on the tire;
• remove the bar guide and tool chain using the wrench from the kit;
• remove the air filter, remove the spark plug;
• in place of the candle, a piston stopper is attached to fix the crankshaft;
• remove the clutch, then access to the clutch system opens.

Rings with bearings are inspected for defects. You can replace it yourself, which will require a repair skill, or take the tool to a specialized workshop. Assembly is done in reverse order.