What To Do If Filled Chainsaw Stihl

Other popular Stihl chainsaw malfunctions

In addition to the faults discussed above, the following are sometimes found on Stihl chainsaws:

  • the ignition system fails;
  • floods a candle;
  • the carburetor is upset, as a result of which the fuel consumption becomes increased or the chainsaw simply stalls even with a slight load.

The engine may malfunction when using low-quality fuel or when the fuel supply system is depressurized.

One of the articles on our website describes in detail how to adjust the carburetor on a Stihl MS 180 chainsaw.

One of the frequent breakdowns of Stihl chainsaws and how to fix this malfunction is described in the following

How to disassemble and reassemble a Stihl chainsaw

Before disassembling the individual elements of the Stihl chainsaw, preparatory work must be done: remove the side grill cover on the body, the chain and the guide bar. Next, clean the entire body of dirt, oil-gasoline deposits, adhering sawdust. If somewhere there are many oil smudges and mechanical cleaning fails to remove them qualitatively, you should use kerosene, gasoline or VD-40.

Remove the starter

When the top cover of the Stihl chainsaw is dismantled, you need to unscrew the 4 fastening screws of the starter. Then the cover of the oil tank and fuel tank will be accessible. The starter does not hold anything in place, it is easy to dismantle.

When the starter is removed, you need to clean the opened internal cavity with gasoline or VD-40, which usually contains a lot of small resinous sawdust pressed with oil smudges. Before using solvents, if the layer of this thick substance is very thick, clean it with wood chips.

chainsaw, stihl

Internal combustion engine malfunctions

If the Stihl chainsaw does not work, it stalls or does not work as it should. When starting the engine and further idling, knocks or crackling are heard, the saw vibrates strongly in the hands, most likely the problem is in the motor. Perhaps the piston clings to the cylinder or the piston rings are loose.

Rebuilding an engine is the most difficult and precious process. It is quite problematic to repair the engine of a German chainsaw with your own hands, because in addition to local repairs, you will also need final adjustment. Therefore, we advise you not to get involved in an adventure and entrust the repair to specialists from an authorized service center.

Cutting attachment malfunctions

A sufficiently lubricated and sharpened chain at the correct angle is one of the main advantages in the work of Stihl gasoline saws. During operation, the chain can jam, often the reason for this is clogging of the lubricant supply pipes or a breakdown of the fuel pump. The chain will often break when seized, creating a risk of injury to the user. An open circuit can occur for other reasons:

  • the lubricating fluid has run out or it is not supplied in sufficient quantity;
  • the drive or driven sprockets are worn out;
  • getting into the links of the chain of foreign objects;
  • poor quality of the metal of the chain, or overshadowed its teeth;
  • use of an unsuitable saw blade (chain).

It is very important to keep the chain sharpening angle exactly. Not only does the cutting speed depend on this, but also its accuracy. Stihl produces a whole range of specialized sharpeners for sharpening various types of chains in an automated mode.

Chainsaw assembly

After complete disassembly, you must first assemble the engine separately, after which, observing the reverse sequence of parsing, assemble all the components of the chainsaw together. The final stage will be the installation of the rods of the carburetor block and ignition wires.

Removing the handle

The handles of the Stihl chainsaw are held on the body by three anti-vibration rubber shock absorbers. First you need to remove the plastic plugs from the middle of the rubber gaskets. Then, with a piece of thin reinforcement or a thick screwdriver, squeeze out the upper gasket from its bore hole, which is located next to the rear handle. Then the middle shock absorber is dismantled.

To remove the third shock absorber, you need to turn the saw body away from the inside of the handle and, pulling in the opposite direction, remove it from the shock absorber.

Removing the clutch and oil suction system

To get to the clutch mechanism of the Stihl chainsaw, you need to remove the sprocket from its seat. It is necessary to remove the washer-stopper from the fixing grooves on the crankshaft, remove the bearing, sprocket and gaskets.

Unscrew the clutch with a 19 hex head. Here the thread is non-standard, left, you need to unscrew it towards the guide rail.

Having completely unscrewed the clutch and putting it aside, remove the baffle plate from the crankshaft and the oil pump drive. There are no retaining rings here, everything is removed by hand.

Replacing the piston

Let’s consider how the diagnostics and replacement of the piston group is carried out. It is necessary to check the condition of the cylinder and the degree of wear of the piston. After dismantling the motor, unscrew the pallet, remove the crankshaft with the piston from the cylinder. Unscrew the piston pin stoppers. If the piston is defective, it must be replaced. Retaining rings are fixed with a cut down. Before installing the piston group in the cylinder, the piston is lubricated with oil. Before installing the crankcase, degrease its surface and apply a sealant.

How to disassemble, repair and assemble a Stihl chainsaw

In order to repair the device, it must first be disassembled. You need to remove the side cover, saw chain and bar. Then clean the tool, blow it out with a compressor and brush all the components with a brush. Then remove the handle. To do this, remove the plugs from the shock absorbers using a screwdriver. After that, remove the shock absorbers and the handle.

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Then the starter is removed. Remove the housing cover and unscrew the starter screws. The part is removed. Then they remove the flywheel by unscrewing the nut that holds it, unscrew the flywheel nut. You need to twist to the left. Remove the flywheel. Then dismantle the clutch, oil pump drive and carburetor.

After that, the motor is removed and disassembled. It is held in place by 4 screws on the bottom of the saw. You need to unscrew them and remove the motor. Then the engine itself is disassembled. Unscrew the crankcase screws, remove it. Then dismantle the crankshaft, oil seals, bearings and piston rings. At the end of the disassembly, repairs and troubleshooting are performed.

After repair, the tool will need to be reassembled. For this, the piston is installed on the connecting rod. The arrow on it should look along the chain, and to the left of the piston will be the side of the crankshaft in which you want to mount the flywheel. They put the piston in the cylinder. Install the bearings, oil seals and circlip into the cylinder. After that, degrease the place of fixing the crankcase and install it in its place. When reassembling, follow the reverse sequence of dismantling.

How to remove and replace an asterisk

Replacing the sprocket on a chainsaw is needed in cases when:

  • jams the movement of the chain;
  • the drive sprocket is worn out.

To replace, you need to remove the chain saw sprocket. The sprocket teeth must not deviate from the required dimensions, otherwise the saw operation will be accompanied by vibration, which will lead to damage to the crankshaft and bearings. The lifespan of the sprocket is 2 times that of the chain. Use 2-3 chains until the cutting surface is abraded. After that, change the asterisk. It is located behind the clutch. Remove the clutch cover.

Remove the bar, chain, and clutch. But first you need to fix the crankshaft. Then the stripper is placed in the hole of the sleeve and turned clockwise. Remove the clutch. There is an asterisk behind it. Now it is being dismantled. If it is defective, it is replaced.

How to set the ignition

It is necessary to set the ignition on the chainsaw. The ignition is adjusted as follows:

  • turn out the candle and evaluate its appearance;
  • specify the distance between the magnets and the coil (up to 0.2 mm);
  • check the spark.

How to remove the clutch

Remove the drive sprocket before unscrewing the clutch. Remove the corkscrew washer and remove the sprocket and needle bearing. Unscrew the clutch. Remove the baffle plate and pump.

Repair and replacement of the oil pump

Consider how to change the oil pump. If the element leaks, then the gasket between the two parts should be renewed. If this part of the oil pump is not damaged, then it must be wiped and put back. Now they check the hose. There should be no cracks on it. If the hose is damaged, replace it. Then the outlet channels are cleaned with a compressor.

The main malfunctions of Stihl chainsaws and DIY repair instructions

The Stihl chainsaw is a tool that is designed for harvesting wood, processing plants, creating landscaping and other household needs. In case of breakage of any parts or failure of the device, you will need to repair the Stihl chainsaw.

Carburetor repair and adjustment

The carburetor is adjusted on a warm engine. If the engine fails to tune, the carburetor stuck may cause excess gasoline in the mixture. To remove the part, it is necessary to unscrew the fastening nuts, disconnect the ignition and the rod from the engine control lever. Then the lever is removed. Then you can remove the filter and carburetor.

The muffler is secured with two nuts. You need to untwist them and pull the muffler towards you. Then the screws of the coil are unscrewed and dismantled. On the Stihl saw, the carburetor has 1 idle adjustment screw. If the idle speed is violated, then the carburetor needs to be repaired. This is a complex process, difficult to do on your own. Contact a repair shop.


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

The termination of engine cold operation occurs for other reasons:

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

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

Ignition setting

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

Before adjusting, check the dryness of the plug 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. If there is no flash, test the cable with a probe. Then check the serviceability of the wire to the disconnecting button.

If the cables are intact, then check the ignition coil. This is done with a special tester to ring the device. In this case, the indicators on the device must coincide with the technical characteristics of the coil, which are prescribed in the instructions for use. If inconsistencies are found, then the ignition unit changes 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 probe. You can also use a four-fold A4 sheet or a piece of cardboard from a cigarette pack.

The coil can be damaged by vibration when dropped or bumped, so work with caution.

Why the Stihl chainsaw won’t start

For a preliminary diagnosis of the reasons, check the operation of the gas pump, the appearance of the plug, 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.

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In this article, we will consider the main problems that can arise when starting the Stihl chainsaw (the spark is gone, the tool stalls or does not pick up speed), as well as ways to eliminate them.

Doesn’t slow down

The tool quickly reaches its maximum number of revolutions and the power does not decrease. This situation is explained by the fact that:

  • the throttle valve does not work due to a weakening of the spring or traction element;
  • the turning on toggle switch periodically fails;
  • no corkscrew on the throttle shaft;
  • clogged carburetor;
  • the fuel hose and the petrol filter are malfunctioning.

Malfunction of the ignition coil

The module or coil is not disassembled, and its suitability is difficult to determine without testing devices. Modern ignition systems are durable, lightweight and small in size. They are characterized by near-fail-safe functionality. Problems with chainsaw malfunction due to the ignition coil can be fixed by yourself.

Lead wires are tested for damage (including internal ones) that arise from vibration that leads to friction. If no cracks are found, then replacement of the ignition coil is required. Sometimes a weak, subtle flash when the saw heats up indicates a malfunction of the module. 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.

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 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.

Broken crankshaft bearings

In case of bearing defects, a slight backlash is felt. To detect it, the flywheel of the Stihl MS 180 saw is swinging from one side to the other. The movement indicates that the flywheel is being pushed towards the electrodes by its own magnets, resulting in no spark. To remove the mechanism, dismantle the cutting element, remove the filter and clutch cover. For the crankshaft stopper, remove the manual starter cover and tighten the two bolts.

The clutch is unscrewed with a wrench clockwise. Remove the drum with an asterisk, change the old clutch and screw it all the way. The crankshaft is locked 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 released from the brake.

Bearings with defects are less often detected (the diameter of the holes in the cage is increased). For determination, disassemble and measure with a micrometer. Broken bearings are indicated by regular knocking. In this case, urgent repair is required, since if the integrity of the crankshaft is violated, the piston group and cylinder will fail.

The main reasons why the Stihl chainsaw does not start and how to fix them

German saws STIHL (Stihl) have long established themselves as a high-quality and reliable cutting tool. The company offers a wide range of models for various needs:

  • Low-power chainsaws for work in the garden or in the country for cutting shrubs and felling trees with a small diameter trunk, harvesting firewood: MS 170 (1.3 kW), MS 211 (1.7 kW), MS 230 (2 kW) and others.
  • Chainsaws of medium power, 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 household work related to the processing of wood of various hardness: MS 361 (3.4 kW), MS 361 (5.2 kW) and others.
  • battery-powered saws and saws that do not require refueling, but are also great for small summer cottages: e.g. MSE 250 C-Q or MSA 220 C-B (with AP 300 S and AL 500).

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, cannot develop the intended power, or suddenly picks up high revs.

Possible causes of problems

The causes of malfunctions, after which it is necessary to repair the Husqvarna chainsaw, are divided into two types:

  • Breakdown of the engine, or rather, the piston group, fuel system, ignition or exhaust system.
  • Mechanical faults such as lubrication mechanisms, braking system, tire and clutch.

Basically, the cause of a malfunction of a semi-professional chainsaw is precisely engine malfunctions. Such a breakdown gives a lot of trouble to the owners of this model.

Manifestations of engine malfunction:

  • Runs unstable and idle.
  • Will not start at all.
  • Doesn’t have enough power or starts to stall, gaining momentum.

Before repairing a chainsaw, you need to familiarize yourself with its device. And only after that, proceed to troubleshooting, acting according to the method of eliminating possible malfunctions. As a rule, experts recommend first diagnosing those parts, the breakdown of which is easiest to identify.

Do-it-yourself chainsaw repair: what to do if a problem occurs?

Nowadays, almost every advanced summer resident or villager has a chainsaw on the farm. This tool is very popular because it is lightweight and very easy to operate. In the event of almost any malfunction, the chainsaw can be repaired by hand. Mostly summer residents use semi-professional or household saws that can cope with small amounts of work.

Ignition check

Do-it-yourself repair of chainsaws should begin with checking the normal operation of the ignition system. The spark plugs are checked first, as this part displays the state of the entire fuel system.

Having unscrewed the candle, first of all, you should pay attention to its surface, and if there is no moisture there, then you should not look for the cause of the malfunction here. But if there are residues of the fuel mixture on its surface, the problem can be detected when starting the chainsaw or in the carburetor. In this case, the candle must be rinsed and cleaned, and then check for the presence of a spark. If it is absent, then the cause of the breakdown must be looked for in the ignition module.

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Chainsaw “Stihl

She is one of the most common semi-professional chainsaws. It is easy to use and can last for a long time without the need for repairs. However, there are situations when the engine starts to stall during operation, or the equipment does not start at all. In this case, it becomes necessary to repair the “Stihl” chainsaw.

What a chainsaw consists of?

Almost all semi-professional chainsaws have a carburetor-type two-stroke engine in their design, in which at least one cylinder and air-type cooling are present. The carburetor is responsible for the stable operation of the saw and the preparation of the fuel-air mixture.

Various clogging impurities should not enter the engine along with the air, since this can spoil the piston group in a relatively short period of time.

In order to avoid this type of problem, it is necessary to regularly clean the air filter.

To start the engine in the chainsaw, a starter is provided in the form of a handle with a cable wound on a pulley. Manufacturers of such equipment equip even the most powerful saw with mechanisms that facilitate engine starting.

In order for the saw to have a minimum vibration level, it is equipped with a special system that dampens vibrations and has an anti-vibration effect.

Malfunctions in the fuel supply

  • Lid clogged.
  • Clogged filter.

In the event of a malfunction of the carburetor or air filter, the fuel is not supplied in full. To repair chainsaws with your own hands, you need to read the instructions, which clearly show the steps for disassembling and cleaning the filter.

What to do if the saw won’t start?

First you need to find out the cause of the problem. This can be done in several ways:

  • Clean carburetor. Drain old gasoline and disassemble, clean and dry the carburetor.
  • Pay attention to the condition of the spark plug: if it is dry, then there is no fuel supply. In this case, it is necessary to change the fuel filter.
  • Check for spark. In its absence, you need to change the candle itself.
  • In the absence of compression, a more overhaul of the chainsaw is required. This will require replacing the old oil seals, piston and filter. But before replacing the piston, you should first remove the muffler and check its condition. If there are no scuffs or other damage, then there is no need to replace it.

If earlier the saw just started badly, and now it has stopped working altogether, then in such a situation, experts recommend a complete replacement of all rings.

Often repairs to the Stihl chainsaw can be done by simply adjusting the carburetor. If such manipulations did not help to achieve the normal operation of the tool, then you should contact the professionals who can indicate the exact cause of the breakdown.

Chainsaw “Husqvarna

Everyone knows that the reliable and stable operation of the chainsaw is ensured by careful use and timely repair. If the tool is repaired correctly, using original spare parts, then it can serve for a long time, without changing the quality of performance at all.

Do I need to adjust the carburetor

Many consumers do not consider chainsaws to be an innovative technique used only by specialists. Many summer residents and ordinary home craftsmen have such a tool. After all, a chainsaw is used as a convenient replacement for an ax, especially since manufacturers offer customers a variety of models of units and at a very affordable price.

Since the design of the device is quite simple, if desired, everyone can figure out why the chainsaw does not start, taking into account the advice of experts.

Before proceeding to consider the main issue, you should figure out how to adjust the carburetor. the main winding device of chainsaws. If we consider the adjustment on the popular Stihl 180 model, then such an event is simply impossible to carry out.

In this model, the carburetor is equipped with a single tuning screw, that is, the winding device can be considered as a screw used to adjust the idle speed. The nozzle provided in the factory device is stationary and fully equipped with a load. In simple words, we can say that the factory setting of the carburetor helps to supply the air-fuel mixture directly to the engine during operation of the unit.

What to do if you pour a candle on a chainsaw

Almost every home craftsman, let alone professionals, has a high-quality chainsaw in his own arsenal. Which is not at all surprising, because such a tool is an ideal assistant, helping to take care of both the garden and harvesting a huge amount of firewood. Working with the tool, you do not need to spend a lot of effort and energy, and the result will certainly please.

Stihl MS170 Slows Down / Loses Power / Bogs

Of course, when choosing chainsaws, consumers first of all give their preference to well-known brands. As the statistics show, the following models are in great demand among buyers:

  • Makita;
  • Stihl 180;
  • Partner 350.

The interest in these brands is quite simple to explain. the above models are made in high-quality performance, have excellent technical characteristics and, one might even say, graceful design. However, regrettably, even the most first-class tool sooner or later fails or requires repair.

Sometimes owners are unable to start the tool because fuel floods the candle on the chainsaw. What steps should be taken to solve this problem, we will consider further, taking into account the advice and recommendations provided by specialists.

Phased repair

If the tool in question is provided with the correct service, in a timely manner to check its technical serviceability, then there will be no problems at startup, since the candles in such units rarely fail. Under other circumstances, if the device fails to start, you need to immediately find the cause of the breakdown and, without delay, eradicate it.

Experts recommend making a poetry self-repair by adhering to the following plan:

At this, the repair work can be considered completed. All that remains is to assemble the parts in reverse order, having previously cleaned them of debris and dust with special cleaning agents.

As it is easy to understand, the process of solving the problem of wet candles is quite simple. Therefore, any home craftsman can handle simple repairs. If any stage causes difficulties, you can find a hint at any time by watching a video instruction on the topic in question.