Stihl 180 Chainsaw Stalls When Pressed

Chainsaws Stihl (Stihl) 180

Among the entire range of chainsaws of the German brand Stihl, the MS 180 model is in the highest demand among gardeners. The advantages of this reliable household tool include reliability, increased endurance and an impressive working life. Chainsaw Stihl 180 stands out for its ease of maintenance and high serviceability, which makes it possible to confidently use it for any novice gardener.

The proportion of oil and gasoline for the Stihl 180 chainsaw

To exclude premature breakdown of the carburetor, the factory cylinder-piston group and other fundamental components of the garden tool, it is important to observe the ratio of gasoline and used engine oil.

First of all, you need to study the proprietary manual. The instruction manual will indicate the correct fuel ratio, the correct gasoline and the correct chain oil for the Stihl 180 chainsaw.

Stihl 180 Chainsaw Stalls When Pressed

According to the manual of the German Stihl saw, to refuel it, you need to use only gasoline of a brand not lower than AI-92, as well as branded oil for 2-stroke Stihl engines. The ratio of fuel and oil should be 1:40, that is, 25 ml should be added to 1 liter of gasoline. Stir the fuel mixture thoroughly by shaking the container several times. After that, the contents of the vessel will need to be poured into the fuel tank.

Chainsaw Stihl МС 180. specifications

High efficiency of the Stihl model in the garden was achieved thanks to decent factory parameters.

Chainsaw features include:

  • Gasoline engine power. 2 HP S. / 1.5 kW;
  • The volume of the factory cylinder is 31.8 cm3;
  • The permissible length of the used tire is 30-35 cm;
  • Fuel consumption. 200 ml / h;
  • The pitch of the chain used is 3/8 “;
  • Weight with saw headset. 4 kg.

The advantages of the chainsaw of the German brand Stihl include a low noise level, like when the factory engine is running under maximum loads, and does not exceed 105 dB.

Why the Stihl 180 chainsaw won’t start?

The reason for the lack of start of the Stihl model, in this case, is to fill the spark plug.

To fix the problem, you will need to disassemble the upper part of the tool and Unscrew the candle. If a thick layer of carbon has formed on the candle, it will need to be cleaned and dried. After that, the clean candle can be screwed back.

Do-it-yourself Stihl 180 chainsaw carburetor adjustment

The factory Stihl chain saw carburetor plays a leading role in the model’s device. During its operation, he is responsible for mixing the fuel mixture with air and supplying it to the engine cylinder.

Before adjusting the carburetor, you will need to remove the plastic body of the tool and clean the internal parts of the saw from dust and carbon deposits. There are 3 adjusting screws under the housing cover. The first 2 screws. marked with the letters H and L. are needed to adjust the proportion of fuel and air, which is determined by the opening level of the throttle valve. When the screws are loosened, the fuel mixture is enriched with air, which causes the engine speed to drop. If the screws are tightened, the amount of air used in the fuel decreases, which leads to an increase in the engine speed.

A screw marked H is required to set the maximum engine speed. Screw L is responsible for adjusting the required minimum operating engine speed. The third screw, marked S, is needed to fine-tune the operating idle speed of the internal combustion engine of the Stihl MS 180 chainsaw.

Setting up a German brand saw carburetor consists of two steps. The first stage is basic, or, as it is also called, factory. It can only be carried out with the engine off of the garden tool. The second stage is final. To complete it, you need the included warm motor. To know to what extent to turn the adjusting bolts, you need to read the saw manual in advance. It lists the exact setting diagram for each individual screw. Adjusting the bolts arbitrarily without knowing their exact end position can damage the chainsaw engine.

During the basic setting of the carburetor with the cold engine turned off, the screws H and L must be slowly returned alternately in the direction of the clock hand to the stop. Then each of them must be turned 2 full turns in the opposite direction.

The final carburetor setting is done in this order:

  • First you need to start the chainsaw engine and let it run for 5 minutes until it warms up completely;
  • Next, you need to start alternately turning the screw H in different directions until the maximum engine idle speed is found;
  • Then the screw marked L must be turned back 1/4 turn counter-clockwise;
  • If, after the steps taken, the chain on the bus begins to rotate, then the screw S will need to be returned against the clock hand. It is necessary to finish manipulating the screws S only when the saw chain comes to a complete stop;
  • Next, you need to set the maximum engine speed, using a hand tachometer connected to the motor.

After adjusting the carburetor, you will need to check the operation of the engine. To do this, to turn on the tool, you must sharply pull the gas trigger several times. If, when the trigger is quickly pulled, the motor sharply picks up speed, and when it is released, it loses it, then the factory carburetor was adjusted correctly.

Running in the Stihl MC 180 chainsaw

After preliminary preparation of the required mixture of fuel and used engine oil, it is necessary to proceed to the scheduled running-in of the new Stihl tool. This procedure plays a huge role, since during its implementation all the working mechanisms of the tool fall into place and rub against each other closely.

To break-in chainsaw Stihl 180, you need to alternately perform the following steps:

  • First, fill with fuel mixture and a suitable saw chain oil. For this, separate tanks are provided in the saw device;
  • Next, you need to turn off the factory inertial brake. this will prevent the plastic case from melting in the clutch area;
  • After that, you need to turn on the chainsaw and let it idle for about 15-20 minutes;
  • Then it is necessary to proceed to sawing thin branches. Gradually, the thickness of the branches needs to be increased.

When running in a Stihl MS 180 saw that is in use, it is important not to run the engine as high as possible, as this can lead to the formation of burrs on the cylinder surface. Also, during the running process, it is not recommended to use motor-drills, bark beetles and other common chainsaw attachments.

How to start a Stihl 180 chainsaw?

It is necessary to start a Stihl chainsaw in the following sequence:

  • First of all, you need to turn on the inertial brake by pulling its plastic lever away from you;
  • Next, you need to carefully remove the protective plastic cover;
  • Then you need to press the standard fuel pump button. Thanks to this, the fuel will enter the cylinder and it will be easier for the starter to start the engine;
  • Next, the combination switch must be set to the permissible position marked “Cold start”;
  • Then the Stihl dust needs to be grasped with both hands and slowly pull the plastic lever of the factory built-in starter until resistance is felt. Immediately after this, it is necessary to quickly pull the starter lever towards you several times until the standard engine starts and does NOT stall;
  • At the end, pull the inertial brake lever towards you, and start working with the tool.
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By adhering to this procedure, the owner of the Stihl MS 180 model will be able to protect its main working parts from increased wear and significantly extend their service life.

Stihl 180 saw stalls at idle speed. how to solve the problem?

In this case, the cause of the sudden breakdown must be sought in the ignition system of the tool. Often, with mechanical shock, the gap between the flywheel and the factory ignition coil is violated, which leads to breakdown of the entire system. In this case, you will need to disassemble the tool and check the distance between the elements.

To adjust the clearance, loosen the flywheel mount. After that, between the flywheel and the ignition coil, you will need to insert a template and start screwing the bolts back in. As soon as the flywheel comes into contact with the template, screwing in the bolts must be stopped.

Chainsaws Stihl 180. malfunctions and repairs

The simplicity of the Stihl MS 180 household chainsaw device allows its owner to eliminate most of the tool malfunctions with his own hands. To successfully repair a model, first of all, you need to determine the causes of the breakdown. The repair algorithm in each case is different and depends on the type of malfunction.

Why does the chainsaw stall when you press the gas

Let’s say the chainsaw works normally at idle, but when the gas is pressed sharply, it stalls. What could be the reason? It is immediately clear that the matter is not about the ignition (no spark), since if the ignition is faulty and there is no spark, the tool would simply not start. Means the fuel system remains.

There are a lot of malfunctions in the fuel system, and to determine the exact reason why the Stihl 180 chainsaw stalls when you press the gas, you need to carry out a complete diagnosis. We recommend reading about common malfunctions of the Stihl 180 chainsaw and their elimination.

Air filter

On the pages of the world wide web, you can find information that the Stihl 180 chainsaw may stall due to strong contamination of the air filter. I would like to refute this Not entirely correct information, and inform that the Stihl MC 180 carburetor is equipped with an compensator, which is designed and installed in order to take in the air necessary for the normal operation of the Stihl 180 chainsaw, bypassing the contaminated air filter. Of course, the power with a clogged air filter will drop a little, but it will definitely not stall. The power may also drop due to wear of the piston, here it will already be necessary to repair the piston Stihl MS 180 chainsaw.

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.

For what reasons the Stihl 180 stalls at idle or full throttle

Any tool capable of Riot salesmen and the Stihl MS 180 chainsaw is NOT an exception. Today we will try to understand such issues as: why the chainsaw stalls when the speed increases, also at idle and at full speed. Consider the options for diagnosing and eliminating malfunctions associated with this behavior of the Stihl 180 chainsaw.

Carburetor

One of the reasons why the chainsaw develops speed when the gas is pressed, but on the contrary stalls, is a malfunction of the carburetor. Let’s say the Stihl 180 saw worked properly, and then it was put on for a long time and did NOT use it. After it was started, and at idle it works well, and when you press the gas it can stall. Why stalls? The reason is a sticky carburetor injector valve. Of course, this is not 100%, but the probability of such a malfunction is high. We recommend reading an article about the device and repair of the Stihl 180 carburetor.

In order to check the nozzle, it is necessary to remove the carburetor and disassemble it. To remove, it is necessary to Unscrew the two nuts securing the air filter and carburetor, then remove the air filter and the engine control lever, while disconnecting the choke control rod from the carburetor. Next, you need to pull the carburetor slightly towards you, and disconnect the fuel supply hose.

Having removed the carburetor, it must be blown out and cleaned of dirt, only after that the carburetor can be unscrewed.

It is necessary to unscrew the cover of the main chamber of the carburetor, this and on which the compensator is installed on top. Further, using a bolt of 8 mm and a length of at least 50 mm. Knock out the valve.

After the nozzle is removed, you can blow it out with a compressor. The valve should only let air through in one direction, if the valve can be freely blown in both directions, then it is defective and must be replaced with a new one. Collect the chainsaw after the valve has been repaired, it is necessary to follow the reverse sequence of disassembly.

To see clearly how the carburetor is being repaired, or rather, how to properly knock out the injector valve from the carburetor body, you can look.

Another common reason a saw can stall when revving up is air leaks into the carburetor. It is possible to check this only with a special tool, but it is worth noting that if preventive work on the carburetor has not been carried out for a long time, then a new set of gaskets can be installed in the carburetor. In some cases, this helps to solve the problem with its depressurization.

When disassembling the carburetor to replace the gaskets, you need to carefully inspect its needle valve, press the rocker arm and check its lifting. Sometimes, especially after the Stihl chainsaw has stood for a long time with fuel in the carburetor, the needle may burn to the carburetor body and NOT perform its functions. Simply put, the needle valve will not allow the fuel mixture to pass through. In this case, the saw will not work.

Filter check

The first thing to check is the fuel filter.

In some cases, a filter clogged with dirt is unable to pass enough fuel mixture through it. Accordingly, a fuel shortage arises 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 enter, as a result of which the Stihl chainsaw stalls. Also, if the fuel filter is bruised, there may be a noticeable drop in the power of the chainsaw at maximum speed, but this is with little pollution.

Why stalls at idle

The first and most common cause of this malfunction is improper carburetor adjustment. You can adjust the idle speed yourself, for this 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 the Stihl chainsaw DOES NOT keep the speed and stalls at idle, you can be almost 90% sure that it has irregularities in the fuel pump operation system, as a rule, it is air leaks into the crankcase through the oil pan gasket, or, much more often, through the oil seals crankshaft. Air leaks Reduces or completely stops the impulse, which is supplied through special channels to the fuel pump of the chainsaw. As a result, the Stihl 180 chainsaw does NOT receive the required amount of fuel and stalls at idle speed.

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Diagnostics can be carried out using a special device, which is called a vacuum gauge.

The second way to check the performance of the oil seals is to pour gasoline into the engine crankcase and look at them, if the oil seals pass gasoline, it means they cannot provide normal pressure in the crankcase, which will make idle work impossible. And when operating at high speeds, with leaking oil seals, there is a possibility of seizure of the crankshaft bearings.

The algorithm for checking the crankcase and Stihl 180 oil seals for leaks is as follows:

  • Removable top cover.
  • Dismantle the air filter housing and carburetor.
  • The handle of the chainsaw is removed.
  • The starter spins and retracts.
  • On the opposite side from the starter, the side cover and the drive sprocket are removed.
  • A piston stopper is installed in the spark plug hole or a string from the old starter with knots imposed on it is stuffed into the cylinder.
  • The flywheel and clutch are unscrewed, after which the parts are removed. It is worth knowing that the chainsaw clutch has a left-hand thread and unscrews clockwise.
  • The gear wheel of the drive of the oil pump is removed.

Having disassembled the Stihl MS 180 chainsaw, you can see the oil seals, then you need to fill the crankcase with gasoline and check the leakage. The crankcase can be filled through the fuel window in the cylinder; for this, the piston must be raised as high as possible. If leaks are found, it is necessary to replace the defective oil seals, or re-seal the pallet. You can assemble Stihl 180 by following the reverse sequence of the algorithm.

If the Stihl MC 180 chainsaw stalls at idle, and does not gain power when you press the gas or even stalls at full speed, it is necessary to diagnose the fuel system and check the crankcase for leaks. You can do it yourself, but you need to have certain skills. If you are not familiar with two-stroke saws, it is better to turn to specialists, since this technique is quite capricious and any mistakes are expensive.

Stihl 180 stalls

One of the reasons why the chainsaw develops speed when the gas is pressed, but on the contrary stalls, is a malfunction of the carburetor. Let’s say the Stihl 180 saw worked properly, and then it was put on for a long time and did NOT use it. After it was started, and at idle it works well, and when you press the gas it can stall. Why stalls? The reason is a sticky carburetor injector valve. Of course, this is not 100%, but the probability of such a malfunction is high. We recommend reading an article about the device and repair of the Stihl 180 carburetor.

In order to check the nozzle, it is necessary to remove the carburetor and disassemble it. To remove, it is necessary to Unscrew the two nuts securing the air filter and carburetor, then remove the air filter and the engine control lever, while disconnecting the choke control rod from the carburetor. Next, you need to pull the carburetor slightly towards you, and disconnect the fuel supply hose.

It is necessary to remove the fuel hose as carefully as possible, and prepare a plug for it in advance, since fuel should go from it.

Having removed the carburetor, it must be blown out and cleaned of dirt, only after that the carburetor can be unscrewed.

It is necessary to unscrew the cover of the main chamber of the carburetor, this and on which the compensator is installed on top. Further, using a bolt of 8 mm and a length of at least 50 mm. Knock out the valve.

To knock out the valve, you must install the carburetor on a wooden stand, this will protect it from damage to the body.

After the nozzle is removed, you can blow it out with a compressor. The valve should only let air through in one direction, if the valve can be freely blown in both directions, then it is defective and must be replaced with a new one. Collect the chainsaw after the valve has been repaired, it is necessary to follow the reverse sequence of disassembly.

To see clearly how the carburetor is being repaired, or rather, how to properly knock out the injector valve from the carburetor body, you can look.

Another common reason a saw can stall when revving up is air leaks into the carburetor. It is possible to check this only with a special tool, but it is worth noting that if preventive work on the carburetor has not been carried out for a long time, then a new set of gaskets can be installed in the carburetor. In some cases, this helps to solve the problem with its depressurization.

When disassembling the carburetor to replace the gaskets, you need to carefully inspect its needle valve, press the rocker arm and check its lifting. Sometimes, especially after the Stihl chainsaw has stood for a long time with fuel in the carburetor, the needle may burn to the carburetor body and NOT perform its functions. Simply put, the needle valve will not allow the fuel mixture to pass through. In this case, the saw will not work.

Why does the chainsaw stall when you press the gas

Let’s say the chainsaw works normally at idle, but when the gas is pressed sharply, it stalls. What could be the reason? It is immediately clear that the matter is not about the ignition (no spark), since if the ignition is faulty and there is no spark, the tool would simply not start. Means the fuel system remains.

There are a lot of malfunctions in the fuel system, and to determine the exact reason why the Stihl 180 chainsaw stalls when you press the gas, you need to carry out a complete diagnosis. We recommend reading about common malfunctions of the Stihl 180 chainsaw and their elimination.

Stihl 180 stalls

Filter check

The first thing to check is the fuel filter.

In some cases, a filter clogged with dirt is unable to pass enough fuel mixture through it. Accordingly, a fuel shortage arises 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 enter, as a result of which the Stihl chainsaw stalls. Also, if the fuel filter is bruised, there may be a noticeable drop in the power of the chainsaw at maximum speed, but this is with little pollution.

Air filter

On the pages of the world wide web, you can find information that the Stihl 180 chainsaw may stall due to strong contamination of the air filter. I would like to refute this Not entirely correct information, and inform that the Stihl MC 180 carburetor is equipped with an compensator, which is designed and installed in order to take in the air necessary for the normal operation of the Stihl 180 chainsaw, bypassing the contaminated air filter. Of course, the power with a clogged air filter will drop a little, but it will definitely not stall. The power may also drop due to wear of the piston, here it will already be necessary to repair the piston Stihl MS 180 chainsaw.

Why stalls at idle

The first and most common cause of this malfunction is improper carburetor adjustment. You can adjust the idle speed yourself, for this 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 the Stihl chainsaw DOES NOT keep the speed and stalls at idle, you can be almost 90% sure that it has irregularities in the fuel pump operation system, as a rule, it is air leaks into the crankcase through the oil pan gasket, or, much more often, through the oil seals crankshaft. Air leaks Reduces or completely stops the impulse, which is supplied through special channels to the fuel pump of the chainsaw. As a result, the Stihl 180 chainsaw does NOT receive the required amount of fuel and stalls at idle speed.

READ  How to Set the Ignition On The Stihl 130 Trimmer

Diagnostics can be carried out using a special device, which is called a vacuum gauge.

The second way to check the performance of the oil seals is to pour gasoline into the engine crankcase and look at them, if the oil seals pass gasoline, it means they cannot provide normal pressure in the crankcase, which will make idle work impossible. And when operating at high speeds, with leaking oil seals, there is a possibility of seizure of the crankshaft bearings.

The algorithm for checking the crankcase and Stihl 180 oil seals for leaks is as follows:

  • Removable top cover.
  • Dismantle the air filter housing and carburetor.
  • The handle of the chainsaw is removed.
  • The starter spins and retracts.
  • On the opposite side from the starter, the side cover and the drive sprocket are removed.
  • A piston stopper is installed in the spark plug hole or a string from the old starter with knots imposed on it is stuffed into the cylinder.
  • The flywheel and clutch are unscrewed, after which the parts are removed. It is worth knowing that the chainsaw clutch has a left-hand thread and unscrews clockwise.
  • The gear wheel of the drive of the oil pump is removed.

Having disassembled the Stihl MS 180 chainsaw, you can see the oil seals, then you need to fill the crankcase with gasoline and check the leakage. The crankcase can be filled through the fuel window in the cylinder; for this, the piston must be raised as high as possible. If leaks are found, it is necessary to replace the defective oil seals, or re-seal the pallet. You can assemble Stihl 180 by following the reverse sequence of the algorithm.

The second method to check the performance of the oil seals is to pour gasoline into the engine crankcase and look for them, if the oil seals let gasoline pass, it means they are to provide the usual pressure in the crankcase, which will make idle operation impracticable. And during operation at high speeds, with leaking oil seals, there is a possibility of jamming of the crankshaft bearings.

  • Removable top cover.
  • Dismantle the air filter housing and carburetor.
  • The handle of the chainsaw is removed.
  • The starter spins and retracts.
  • From the side opposite to the starter, the side cover and the drive sprocket are removed.
  • A piston stopper is installed in the spark plug hole or a string from the old starter with knots imposed on it is stuffed into the cylinder.
  • The flywheel and clutch are unscrewed, after which the parts are removed. It is worth knowing that the chainsaw clutch has a left-hand thread and unscrews clockwise.
  • The gear wheel of the drive of the oil pump is removed.

Having disassembled the Stihl MS 180 chainsaw, we meet the oil seals, after which we need to fill the crankcase with gasoline and check the leakage. You can fill the crankcase through the fuel window in the cylinder; for this purpose, the piston must be raised very high. If leaks are found, you need to replace the defective oil seals, or re-seal the pallet. You can collect Stihl 180 following the reverse sequence of the method.

Air filter dirty

It’s easy to make sure the air filter is dirty. You just need to remove it and start the chainsaw without it. if the saw works fine, then it’s in it and it just needs to be changed or washed, depending on its type. Do not be afraid that the chainsaw will work for a while without dust protection. if there is a dust cloud around you, then everything is in order.

Why stalls on idle move. Chainsaw Stihl. CARBURETTOR REPAIR. When you press the gas, the chainsaw stalls. One of the reasons.

It is necessary to very carefully remove the fuel hose, and prepare a plug here in advance, since it should be used for fuel.

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

You need to unscrew the cover of the main chamber of the carburetor, this is also where the compensator is installed on top. Further when using a bolt of 8 mm and a length of two or more 50 mm. Knock out the valve.

Air filter

On the Internet page, you can easily find information that the Stihl 180 chainsaw can stall due to strong contamination of the air filter. I would like to refute this NOT correct information, and say that the Stihl MC 180 carburetor is equipped with an expansion joint, which is designed and installed in order to take in the air necessary for the normal operation of the Stihl 180 chainsaw, bypassing the dirty air filter. This power with a clogged air filter will fall off slightly, but it will definitely not stall. The power can also fall due to wear of the piston, here it will already be necessary to repair the piston Stihl MS 180 chainsaw.

This is one of the problems why, the saw stalls when you press the gas.

For accurate dosage, I myself personally use a medical syringe and a measuring container in which one liter of gasoline can be clearly measured. I pour a liter of gasoline into a container, draw 25 (at 1:40) or 20 (at 1:50) cubes of oil into the syringe and add it to the gasoline.

After preparing a new mixture, Drain the previous mixture from the tank, in which we are unsure, and fill in the fresh one we just Prepared.

Now that you have done everything to dispel any doubts about the quality of the fuel, we proceed to further actions.

As I wrote above, with a lack of oil on the piston and cylinder walls, scuffs can form. and they are almost always formed. If you are lucky and no seizure appears, then with the new fuel mixture, cooked in the correct ratio, the chainsaw should start working normally.

If seizures appear, then the saw can start several more times and stall, after which it will stop starting altogether. In such a situation, I sympathize with you, since, most likely, now you will need to replace the piston group, which will be very expensive.

If the saw, as before, starts up and stalls at high speeds, then we manipulate the filters.

Low oil in the fuel mixture

Let’s look at the most unpleasant case first. Why? Because before manipulating the filters, it is better to make sure that your oil and gasoline are mixed in the correct ratio.

Here, however, it is worth noting that if your saw has already been turned on many times (for example, ten times), but it continues to start, and then stalls again with increasing speed, then everything is apparently in order with the fuel. Otherwise, she would have simply stopped starting altogether.

But still, I recommend that you immediately dispel the slightest doubts about the quality of the fuel, as soon as your saw stalled when you accelerate for the first time. Because, if the reason is in the fuel, then, as mentioned above, you can get expensive repairs. Otherwise, you can still do it. To dispel doubts is to drain the old fuel from the tank and fill in with freshly prepared fuel, in which oil and gasoline are mixed in the correct proportion.

The correct ratio is best seen in the instructions for the saw. If you have lost it, then we look at the ratio on the oil package. It is usually 1:50 or 1:40. If the oil is used “non-native” (well, for example, for Stihl chainsaws, Stihl will also not be enough “native”), then I recommend using a ratio of 1:40, even if the oil packaging says 1:50.

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