chinese, stihl, does, start, reasons

Proper adjustment of the Carburetor of the Stihl MS 361 chainsaw

Almost all tools, and foreign ones (Husqvarna, Makita, Stihl, Partner 350), and Chinese chainsaws, and domestic (friendship, Urals) are arranged the same way. Therefore, to find the reason why the device does not start and stalls is not difficult. There are four elements in which problems may arise:

  • Fuel for which the carburetor is responsible;
  • Lubrication;
  • The air that enters the air filter;
  • Spark, the quality of which depends on the ignition unit.

All of them depend on each other and interact with each other. If any element works incorrectly, then the saw stops working.

To begin with, all the tools start in different ways-on hot and cold. Two frequently used mechanisms are responsible for this process.

Be sure to see what is written in the user’s instructions. It indicates that when turned on, it is necessary to make sure that the emergency stop brake is recorded. But it is much more difficult to start a saw with a brake, so sometimes it is better not to turn on the brake.

As you can find out from the instructions, there are a fuel tank and engine inside the case, and the saw part (tire with a chain), handle and starter are outside.

First you need to figure out how exactly the tool does not start. For example, the saw starts up, but immediately stalls, or loses the power of work, the quality of the saw.

Perhaps interruptions in the work occur due to problems in the engine. But I would not recommend it immediately to disassemble it. It is better to look for a problem from the simplest option.

It is very important to take into account the quality of fuel. If the mixture is prepared incorrectly or has deteriorated over time, then even such reliable tools as the Urals or Husqvarna 145 will not work. The instructions must indicate proportions and special oil for your chainsaw.

Another common problem. during the start, the user floods the candle. It needs to be examined if it is completely dry, then the fuel does not go to the cylinder.

If you see a black fuel or a lot of fuel, then perhaps the carburetor incorrectly regulates fuel supply.

If your saw.tool starts up, but immediately stalls, then the problem needs to be sought by a jacket of a carburetor or a fuel filter. Perhaps they clogged.

In order to check if the saapun is damaged, it is necessary to disconnect the fuel hose from the carburetor and see if the fuel mixture flows from it.

If the saw does not start hot, then the problem can be in the muffler. Sometimes it clogs from the exhaust itself.

Often often a saw breakdown occurs due to a small amount of lubrication for the circuit. This happens with clogged channels or leaking oil pipeline.

Also inspect the connections of the tubes with oil pumping fittings, do they leak.

Very bad when the breakdown arose in the cylinder. When examining it, you can detect irregularities or chips, this may be the cause of the problem.

How to check the flow of an pulse from the engine crankcase

The fuel pump is located in the carburetor. Its work is carried out by receiving pulses from the engine crankcase through the pulse channel. The channel is located in a rubber pipe through which the cylinder and carburetor are reported.

If the pulse channel clogs, the quality of fuel supply is reduced or it does not arrive at all. To access the pipe, you need to remove the air filter housing and carburetor. After that, using a metal wire, the channel is checked or cleaned.

Holocaust rpus adjustment of the Carburetor of the Stihl 180 chainsaw

Stihl 180 chainsaw design contains many rubber parts. All of them require a systematic test for cracks and other defects. If there are part, the parts are replaced with new.

Another reason for the lack of impulse may be the depressurization of the Carter of the STIHL chainsaw engine. In this case, the air supply to the pump is reduced or completely stopped.

Tightness is checked using a vacuummeter. In his absence, a medical syringe will come to the rescue. The operation is carried out on the engine with a carburetor removed. A little motor oil is typed into the syringe and poured it into the pulse canal, and then pull the starter handle.

In the absence of a pulse, the oil will remain in the channel. You can eliminate this problem by dismantling the engine and replacing the seals. If the oil from the channel squeezed out, probably the problem lies in the malfunction of the pump.

The installation system device

A key role in any chainsaw is played by a carburetor power unit of a two.stroke type. Its power directly depends on the selected model and purpose. The second important mechanical node in the device is considered the saw part, which consists of a tire, a cutting chain and a chain wheel. Data parameters of the components may vary.

With lubricating mixing, it is carried out using special oil, which is poured into a specialized tank, it is located on a manual block. Separately, it should be distinguished that the volumes of the oil tank and fuel are calculated in such a way that their contents, as a rule, ends at the same time.

Fault options and elimination methods

Regardless of the brand of the chainsaw. Champion, Husqvarna 236 or Patriot, the reasons for poor work are identical. Options why the stihl chainsaw is not started, the mass is the following.

The chainsaw is poorly started on the cold

If the saw is poorly started on the cold, it means that it does not have compression. This is due to abrasion of rings due to long-term operation. It turns out when the user is trying to start Champion 137 in a cold state, compression for this manipulation will not be enough.

In this case, it is not recommended to systematically pull the handle. In the end, the unit will nevertheless start, but at the same time, other mechanical nodes may break off it. In this situation, you need to replace the erased rings with new.

The chainsaw is not started on hot

Here the reasons lies in the filing of the engine and get wet of the candles. Here’s what to do in such a situation:

  • rearrange the air damper in the middle position;
  • well make the components of the parts;
  • start the device for 10 seconds;
  • transfer into the mode of operation at idle;
  • on a chainsaw caliber or other model completely open the damper.

Next, just start the motor at idle with pulling the handle. If the engine does not overheat, it will easily start.

In the event that this option of eliminating the malfunction did not help, then the motor has already managed to cool strongly. Make a fiction of half.gas according to the recommendations from the instructions and repeat the operation.

You should also try to scroll through the cold screw in the direction of movement of the clockwise. The higher the speed of the rotation in the equipment, the easier it is to start it. You should know that the chain at idle should remain in a stationary position.

The chainsaw is poorly started and stall immediately

In this situation, the reason is the filling of suppositories with gasoline at the moment when the user tried to turn on the unit. A small volume of fuel accumulates under the candle electrodes, which is why there is no spark in the equipment.

Removing a candle and its thorough drying will help to solve the problem. In addition to these actions, you can additionally fragment. But this manipulation should be carried out exclusively using a gas burner. In another case, a small cargo in the field of electrodes may form. After complete drying of the candles, you need to drain the excess fuel and leave to dry the equipment itself.

Chinese saw does not start

It should be noted right away that Chinese devices do not have a distinctive features from other analogues. They are also reliable and productive, moreover, they cost less. The only thing that is necessary for this device is necessary is to use only branded oil and fuel.

Most units do not work well on the fuel of domestic manufacturers, gasoline clogs channels and, as a result, fuel does not enter the motor. Use fuel either of high quality or from the manufacturer of the saw itself.

Why is the new saw not working

New equipment should not have problems with the wear of functioning mechanical parts, since the model came out only from the conveyor. Such untidiness may occur in the case of the acquisition of demonstration technology, which was more than once used to advertise the company. The cause may also be improper operation of the unit, which does not comply with the recommendations from the instructions.

First of all, you should check whether all parts and components of the elements are installed in their places. Still, for example, Husqvarna will not start if the fuel mixture prepared without taking into account the necessary proportions was poured into it.

But if all the recommendations are followed, each part is carefully recorded in its place and the equipment was not purchased from the stand, probably the buyer came across a defective device.

The tank is not enough fuel or it is of low quality

This is one of the most common reasons. Users of gasoline technology, in order to save, often use budget fuel. At first, the unit will regularly perform its work, but the problem will certainly arise after several months of operation.

It should also be remembered that fuel has a shelf life, it should not be stored in the tank for more than three weeks. Such liquid with constant contact with oxygen quickly loses the octane number. This makes gasoline completely unsuitable for use.

Problems with filters

Polluted filters are one of the main factors of the “non.launch” of the chainsaw. Check the air filter for cleanliness, it is located under the clutch body. The fuel cleaner is located directly in the fuel tank.

The location of the air filter and the spark plug

In addition to everything, you should examine the bars in the gas tank. For diagnostics, you should remove all the clogged parts for a while, start the device without them.

How to “run” a chainsaw correctly

In order for the new equipment to work normally, it is necessary to run it correctly.

chinese, stihl, does, start, reasons
  • First you need to prepare a fuel mixture, the proportions of which depend on the power:

Why is the chainsaws badly starting

Consider each reason in more detail.

Fuel and air filter

Pollution of the main filter elements of the chainsaw, adversely affect its work.

For example, a dirty air filter will provide air supply to the carburetor in full, which will affect the quality of the fuel mixture and normal engine start. Fuel filter pollution will make it difficult, or even reduce the supply of gasoline to the carburetor and make the engine to work impossible.

Reduced compression

One of the frequent cases of the difficulty starting of the chainsaw is the wear of the CPG (cylinder.piston group).

As you know, for the normal launch of the chainsaw in its engine, compression should be present. It is necessary for the normal compression of the fuel mixture in the engine cylinder, it also affects the operation of the gasoline pump.

During the operation of the tool, the value of the compression indicator falls, and the chainsaw begins to start poorly.

The reasons for the lack of compression, or its decrease, can be natural, The engine wear out during operation. Problems can also be caused by serious breakdown, for example, Zadir CPG, or breakdown of a piston ring.

A sign of reduced compression is the weak resistance of the starter during the start. With reduced compression, a decrease in the power of the chainsaw is observed, which negatively affects its performance. The problem of replacing piston rings, or completely CPH, is eliminated.

Carburetor adjustment

Not correct adjustment of the carburetor will cause the chainsaw will not develop full power. It will be bad to start, or not start at all. The setting of the carburetor directly affects the quality of the fuel.air mixture, which is necessary for normal starting and further engine operation.

If the carburetor is improperly adjusted, the fuel with the air will be present more, or less gasoline than required, and the mixture will not be ignited even with normal sparking.

Excess gasoline in the mixture, it is customary to call overflow. Characteristic signs of overflow, it is a wet spark plug, after several unsuccessful attempts to start a chainsaw.

Spark plug

Spark plug is one of the main elements of the ignition system. On its electrodes, a spark is formed, and when this element fails, it will be difficult to start, or it is not at all possible.

The candle can completely refuse, or work with interruptions or give out a weak spark. Checking the candle is quite simple, for this you will need to unscrew it from the engine, attach to the cap of the high.voltage wire and, putting it on the cylinder, pull the starter. If the candle is in order, the spark will be powerful with a bluish tint. Weak spark with a reddish tint, a sign of a problem. A defective candle needs to be replaced.

Ignition coil

The reason that a new chainsaw is not started, or it starts poorly, may be a ignition coil. Modern chainsaws are equipped with electronic ignition coils. This part is not subject to repair, and, as a rule, in the presence of a defect, it completely changes.

Gap between the ignition coil and flywheel

An unbelievable gap between the flywheel and the contacts of the ignition coil affects the quality of sparking, which in turn is responsible for the normal start and stable engine operation.

Instructions: how to get a chainsaw so that it does not fail before the deadline?

The correct launch of the chainsaw is one of the most important stages of working with this tool. The productivity of sawing, the wear of moving elements and the total duration of operation depends on compliance with the rules. When working with any model, it is important to be able to carry out the first launch, diagnose the main problems, as well as competently select and fill the fuel mixture. From the article you will learn how to start a chainsaw and independently check its functionality.

Preparation of the fuel mixture

For normal operation of the chainsaw, it is recommended to take gasoline with an octane number of at least 90. The best option is the AI-92 brand, the use of less high-quality fuel can cause tapping of the engine, a decrease in its productivity.

For both and constantly working, two.stroke engine oil is required. It is better to purchase brands designed for specific chainsaw models. The proportions for the preparation of the fuel mixture for each saw are indicated in the operating instructions, it is recommended to mix on average from the calculation of 1:33. For old domestic chainsaws, the mixture is prepared in a proportion of 1:15.

Important! Ethyl fuel is used to refuel chainsaws with an engine without a catalyst. Its presence can be determined by the green lid of the gas tank, for models with a catalyst you need to fill in unhealthy gasoline.

Features of launch in winter

Before starting work in winter, the chainsaw is recommended first to be brought into a warm room for 10-15 minutes. If this is not possible, start the tool at idle, extending the air damper to the middle position. Strengthen the engine power only after preliminary heating. Some models have the possibility of switching air intake in summer and winter mode. this is the optimal solution if you often work in the forest at any time of the year.

Step-by-step instruction

With an activated brake, the assembly process occurs much slower, so everything is also safe and more comfortable to turn on the mechanism without the use of brake equipment.

1 diagram of the standard mechanism

  • Before you start a benzoil, it is necessary to make a damper that performs the adjustment lever, push it off down, compared with the optimal position. First you need to click on the button responsible for the gas supply. Only if this condition is met, it is possible normal movement of the damper to extreme stops from below. You need to simultaneously move the damper and hold the gas button. The gas is installed in a standard position, and the damper closes the carburetor, preparing the device for proper operation.

2 Scheme of a standard mechanism. how to start a saw correctly

  • The ignition is turned on. To do this, you need to move to the right place the toggle switch or move the switch.
  • You usually have to press the pile of swing more than two times. Gasoline is poured into it, after which you will have to click on the device more than three times. Sometimes a chainsaw is not equipped with a primer, then you can skip this stage.

Destroyer checking and repair

The clogged silencers should be left soaked in warm water with a detergent, then wipe it thoroughly and dried.

The muffler malfunction leads to a drop in the power of the tool when working and stopping in idle mode. Despite the apparent simplicity of this detail, it is also important to follow it too. Quite often the muffler is clogged. When working, it is possible to get on a bars of wood dust, sawdust, smile particles. High temperature contributes to their adhesion and accumulation, exhaust gases also form deposits on the surfaces of the sparkle and other details. The layer increasing over time reduces the throughput of the muffler and interferes with the normal removal of exhaust gases. The engine, figuratively speaking, is suffocating.

The repair of this unit is not complicated, it is quite possible for many owners of the tool. The device should be removed from the engine, closed holes with a rag or other material. If the resulting layer is too hard, all the details can be left to soak in warm water with a detergent. After softening the plaque, the part should be washed with a rag or soft brush, thoroughly wiped. Inaccessible places can be blown with compressed air or dried with a hairdryer. The use of mechanical removal means is undesirable.

For the normal functioning of the silencer during a long service life, the lubricants recommended by the manufacturer should be used, monitoring their expiration date. The mixture must be prepared immediately before work and consumed completely.

General information

The characteristics of this saw are the reason for the pride of 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 operation, which should not exceed 20 hours a month. Having at your disposal such an unit, it will not be difficult for you to maintain order in your garden, perform the harvesting of firewood for the winter, as well as clearing the sites. At the same time, he will be able to help you in solving other tasks where there is no need to perform complex manipulations.

Main characteristics

The saw considered can be considered a compact option, because its weight is only 3.9 kg. At the same time, it has an oil and fuel tank of a large capacity. A two.stroke engine helps the device with its working functions, the capacities of which are enough to solve simple problems. In addition to this during operation, this tool does not create strong noise, the level of which does not exceed 98 dB. For ease of understanding, it is enough to say that a person’s speech creates noise at 76 dB.

chainsaw hard to crank fix or get stuck and will not start

  • Stihl 180 chainsaw has a power of 2.6 watts. In principle, this is enough, remembering that it is a tool for household use.
  • The oil tank capacity is 0.145 liters, fuel. 0.25 liters.
  • The tire provided by the design has dimensions 350 mm, while the step is 0.325 inch.

Cumbbound device

As in the case of other saws, the role of the main device providing the launch is performed by the carburetor. Considering in more detail the carburetor, which is equipped with the chainsaw of the Stihl 180, it should be noted that it has a single setting screw. In other words, it is a kind of blanket adjustment screw. At the same time, the jacket, on which there is a full load, is all the time motionless.

In other words, adjustment against him is not applicable. In turn, there is no way to influence the full load. It is also necessary to pay attention to the factory settings, due to which the supply of the air fuel mixture is carried out directly to the engine. over, this principle is maintained regardless of the operating conditions of the tool.

Problem with spark plugs

The problem of the spark plugs is one of the most common causes of a chainsaw breakdown!

This is one of the most common reasons why the engine stalls on a cold. As a rule, its electrodes are covered with a layer of corrosion and soil, as a result of which there is a decrease in the distance between their ends. and the lack of space for skipping a spark ultimately.

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Each manufacturer has its distance between the electrodes, so before inspection of the candle, you must carefully study the instructions for the operation and technical characteristics of the tool.

The cause of corrosion and soot on electrodes is an uneven supply of fuel, which is already a problem with a carburetor, which is solved separately. There is no need to have a car on the candle. the spark may not be for the reason that the fuel completely fills it on the hot, which also indicates problems with the carburetor.

The candle itself must be removed, dried and checked how the spark passes through it:

  • First remove the wire and unscrew the spark plug.
  • Return the tip of the wire to its original position.
  • Put the spark plug to the cylinder with a skirt.
  • Check the presence of a spark by starting the starter.

If there was a spark in this way, then you must immediately proceed to the problem with the carburetor. If not, then the candle needs to either be cleaned from rust and soot, or replace. It is also possible that adjusting the distance between the contacts of the electrodes will help.

Other reasons for the lack of a spark can be called:

The generator block malfunction. If the reason is in it, then you can solve the problem only with its complete replacement.

Poor or disturbed contact between the tip of the candle and the high.voltage craftsman. There may be simple adjustment with a tester.

The final check of problems with the spark plugs can be completed by a nearby procedures, after which the chainsaw should start:

  • Tear out the candle and conduct its full inspection.
  • Clean it from rust and raids, dry
  • Put the ends of the electrodes at the right distance.
  • Drain all unnecessary fuel from the tool engine so that the ignition compartment does not fill.
  • Place the candle back and try to make the ignition again.

If these procedures helped and the saw began to work, and the chain is to move, then you can work for about 5-30 minutes, until the candle is poured again

It is important to understand that this solution is temporary and simply indicative. The main problem lies in the carburetor

The question with him is ambiguous: in any case, it is necessary to adjust the supply of fuel, but how to do it. yourself or with the help of a mechanic. you decide. you decide.

During the tuning of the carburetor, a tachometer must be used, which will allow you to find out with greater accuracy the number of engine speeds.

Based on them, you can already adjust the mode of its operation by adjusting the tightness of the screws on the carburetor block in several scenarios:

Continuity settings for low speeds.

Building the correct supply of fuel at maximum speed.

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It is possible that the carburetor sucks a lot of air outside, which is why the saw at idle begins to behave strangely, and the quantity to change on its own. This is decided by using ordinary gaskets for a carburetor, with which it is necessary to achieve its tightness.

The complete audit of the carburetor is necessary if it was not possible to determine a specific problem, but there is confidence that the jail is connected with this particular part.

  • It is necessary to remove all communications (wires and hoses) from the device;
  • Clean and purge. It is better to do this without removing the carburetor;
  • Remove the product and clean the second time so that there are no traces of fuel and oil inside;
  • Gradually disassemble the device, guided by the drawing in the documentation or independently drawing up the scheme;
  • All channels must be blown with compressed air, and the details should be washed in an industrial solvent;
  • Give parts at least 2 hours to dry;
  • Collect the carburetor back, strictly following the instructions in the documents and the scheme;
  • Connect back.

Why stalls the chainsaw

If the chainsaws start and stall, the reasons can be different. An external inspection should be carried out before attempts to fix the tool.

If the saw stalled during operation, you should check the presence of a mixture of oil with gasoline in the tank. If the fuel mixture is over, the device will not work. In those situations where gasoline still remained, the quality of the tool should be evaluated until the moment of is turned off. The occurrence of extraneous sounds and the subsequent sharp stop should alert.

The formation of soot on electrodes can also cause difficulties in the operation of the tool. Carefully inspect the device, clean if necessary.

When pressing gas

In cases where the chainsaw stalls when you press the gas, you should check the silencer and the fuel filter. A possible cause of problem is a violation of the tightness of the fuel hoses. In some cases, the addition of revolutions helps.

Sometimes checking all the details does not give a result, the tool is suffocating, zooiling when gas is added. If the device stalls when a person presses gas, it is possible to supply fuel in insufficient amount for normal operation. This phenomenon occurs due to clogging of the carburetor or filter.

Damage can occur due to clogging with air filter dust. When you give gas, the device stops working. Do not eliminate the problem yourself, since each model has individual characteristics.

Calling may cause failure or lack of lubrication on the chain of the chainsaw. If the circuit is dry, the channels should be cleaned through which the oil is supplied to the device tire. If the oil proceeds, the presence of cracks, defects on the pipes is noted, you need to treat them with sealant.

Under load

In situations where the device stalls at load, the problem can be with a gas tank or filters. Check the quality of the fuel and change the filter.

Often the saw does not gain momentum due to the fact that the mixture flooded in the gas tank has a low octane number. There is not enough power, sufficient heating does not work, the chainsaw stalls under load.

Often, malfunctions of the component parts lead to the fact that the device stalls under load. You should check for the presence of a sucker hoses, seals, gaskets. If the details are faulty, you can try to fix them or replace them.

In cases where the chainsaw is started and immediately stalls, the fuel is not enough, the device does not heat up. Turn the device

It is important to use a suitable mixture. Different types of fuel are better suited for different models. It is necessary to familiarize yourself with the instructions, recommendations, reviews of people whose device works normally

It is necessary to familiarize yourself with the instructions, recommendations, reviews of people whose device works normally.

At idle

In those situations where the chainsaw stalls at idle speeds, it is necessary to examine the state of the muffler. If the part is polluted, the spent gases are poorly displayed, the engine cannot continue to work, stops.

The saw stalls idle and in cases where the carburetor is incorrectly configured. It is better for beginners to fix the repair to specialists, since there is a chance of incorrect setup, because of which the tool will not be able to work. Tachometer is required to adjust the carburetor.

At high speeds

If the device stalls at high speeds, pay attention to the state of gasoline and air filters, the serviceability of the fuel hoses

Polluted air filter can be washed under warm running water

It is important to thoroughly dry the part before installing it so that the water does not violate the serviceability of the tool

If the liquid stops flowing through the fuel hose, it clogged. You can clean the part or replace with a new.

In cases where the saw stalls at large speeds, but the liquid flows through the hose, and the air filter is clean and working, look for the cause of the breakdown in the fuel filter. Install a new one in its place or clean.

In some cases, the problem is hidden in a gasoline pump. With the wear of the component part, the fuel begins to flow through the walls. If this phenomenon is noted, a new pump should be installed.

When tilted

If the saw does not develop speed when tilted, turns off, stops working, you need to check the fuel level in the tank. If it is not too high, the device is not supplied in an inclined position is not supplied with a sufficient amount of fuel, since the fuel tube is above the mixture level.

Not a chainsaw is started: the causes and methods of eliminating the problem

The extremely accurate and not the simplest design of motorcycles includes about a hundred components, the interaction of which ensures the effective working capacity of the tool. Wear, damage or violation of the position of the elements, cause damage to the mechanism, reducing its capabilities or completely disabled. Among the most common malfunctions, one can highlight the complete failure of the engine to start. This material presents the main reasons why the chainsaw may not start. The process of eliminating each malfunction has a detailed description with photos and video materials.

Among the malfunctions responsible for the launch of the mechanism, you can distinguish simple ones. when restoration does not require specific knowledge, and complex ones. when the engine or carburetor requires repair. The elimination of simple problems, in 90% of cases, is reduced to cleaning or replacing easily accessible components. complex breakdowns can require almost complete analysis of the key components of the system, with the subsequent replacement of damaged elements.

If the tool was operated neatly and according to the requirements of the manufacturer, there is a high probability of easy malfunction. A banal shortage of fuel in the tank, violation of the sequence of actions when starting, lack of a spark, clogging of filters and a saepun and the like, because of which a chainsaw is usually not started. The reasons and nuances of the solution are briefly set out in the next list (hereinafter referred to as in more detail):

The absence of fuel may seem the most obvious reason for the refusal of the launch, however, cases of contacting this subject periodically happen to the service. It seems that there is enough gasoline in the tank, but the filter on the fuel hose does not allow the carburetor to drag it from the bottom. In this case, you should elementarily season the tool at least half.

The correct sequence of actions before starting, greatly facilitates the start procedure. Violation of the algorithm can not only complicate the start, but also make it impossible. The process should be as follows: 3-4 clicks on the primer for supplying fuel to the carburetor, closing the air damper (lever on itself) and some confident rotations of the starter until the chainsaw is in a fraction of a second, after which it will stall. Next, it remains to open the air damper, start and you can use.

The absence of a spark may be associated with a faulty candle or ignition system. The candle can be polluted or deformed, which is solved by cleaning, light repair or replacement. The problem with the ignition system can be associated with an incorrect gap between the flywheel and the coil, the gap between which should not exceed 0.35 mm. If adjustment does not help, the system should be replaced.

The clogged filters (air and fuel) limit the supply of substances vital for the engine, making it impossible to launch it or reducing its effectiveness. There will be no such problem on the new saw, and these elements should be checked after prolonged operation. The fuel filter is fixed on the hose in the tank, and the air on the carburetor.

The fuel tank bath is designed to stabilize pressure, by supplying the required volume of air, instead of a decreasing volume of gasoline. When clogging the saapon, the gas tank will become sealed and the pumping of gasoline will create a vacuum in it. When the pressure threshold is reached, the carburetor will not be able to absorb fuel and supply it to the cylinder. If the tank corks are unscrewed, the air is sharply absorbed into it, then the soundtress is clogged and requires cleaning.

Nar on a graduation valve or muffler may prevent the removal of exhaust gases that occur during the operation of the engine. In this case, the chainsaw can stall immediately after the start, or not start at all. The problem occurs after prolonged operation of the tool and is solved by cleaning the channels.

serious breakdowns are associated with the carburetor and engine. Repair of these elements requires a certain experience, and a person with minimal knowledge of the ICE is better not to undertake. You can independently adjust the carburetor independently, check the compression and replace the membrane (more on this below), but it is better to entrust the complete replacement of the CPG to the specialist.

Details for each malfunction

Having examined the main problem areas and determined the area of ​​restoration work, you can proceed to a more detailed analysis of each reason separately. The following instructions are submitted, they go as the complexity of adjusting increases. The most banal, simple options will require a minimum of time and a standard set of tools for servicing a chainsaw. To eliminate more serious breakdowns, you may require a set of end keys and a compressometer (to check the engine).


The most banal and at the same time quite common problem with launch may occur due to ordinary inattention. With a low level of fuel in the tank of the chainsaw, the fuel hose with the filter cannot completely immerse themselves in it and carry out pumping. Especially often this situation happens when the chainsaw is not started on a hot, after a short break. Although after cooling, without the desired volume of fuel, the engine is no longer launched.

To exclude such an option from the list of possible problems with the start of the engine, it is enough to monitor the fuel level in the tank, and regularly fill it with a high.quality mixture.

The optimal characteristics of fuel may vary depending on the model of a particular motorcycle. The oil ratio to gasoline can be from 1 to 25 to 1 to 50. The permissible octane number of gasoline can have a value of 80, 92 or 95 (usually 92). Many manufacturers recommend using specific grades of oils, whose composition is ideal for interaction with alloys from which the engine and carburetor are made.

Accurate adherence to the recommendations of the manufacturer is relevant during the operation of professional tools that regularly face increased workloads. When working with most domestic chainsaws, any oil for two-stroke engines and AI-92 gasoline, which should be mixed according to the instructions from the tool passport.


Perhaps the most popular problem with the launch of the chainsaw is the absence of a spark that is flammable fuel. Such a malfunction can be associated with pollution or damage to the candle, high.voltage wire, contacts or generator (flywheel and magneto). The most affordable and simple element for diagnosis is a candle, so the check should be started with it.

First of all, it is necessary to gain access to a potential source of breakdown. On most chainsaws, the spark plug is located on top of the carburetor, but there are models where this element is located below.

With the help of a special hexagonal head (it comes with a saw), the candle is unscrewed from the nest, after which its visual inspection is carried out. Contacts should be clean and dry. If the candle is present, then the ratio of fuel to the air in the burning unit exceeds the norm and the carburetor requires adjustment. The presence of a fuel mixture on contacts indicates an excessive fuel supply, which can also be adjusted with a special screw on a carburetor. The first thing to do in this situation is to check the performance of the candle.

Before checking, you should clean the carcass (if any) and completely dry the element. You should also check the gap between the contacts of the candle, which should not exceed 1 mm (ideally 0.7 mm). Next, it remains to connect the candle to the high.voltage wire (candlestick) coming from the generator and pull for the starter. The presence of a spark will indicate the serviceability of the ignition system and the need to further adjust the carburetor.

If the chainsaw is not started, the candle is dry, but there is no sparks, the breakdown should be sought in the ignition system itself. Typically, the absence of an impulse during the rotation of the shaft is associated with the displacement of the magneto in relation to the flywheel. On average, the optimal distance between the above elements should be 0.25 mm (4-5 notebooks). To obtain access to magneto, it is necessary to unscrew the side cover of the case. To adjust, it is enough to loosen the fixing bolts of the magneto, lay the sheets of paper between it and the flywheel, press and tighten.

If the calibration of the gap does not give the result, you should check (visually / call), a high.voltage wire going to the candlestick. In the presence of confident contact, the area of ​​the malfunction narrows to one part. magneto. It should be replaced or contacting the service for repair.

Exhaust system

As the engine is operated, the fuel burned in the cylinder forms outgoing gases, some of which settles inside the resonator, sparkle and muffler. The soil layer gradually increases, filling the interior and reducing the throughput of the channel to remove the developed body. Insufficient removal or full stagnation of exhaust gases in the cylinder prevents the flow of fresh air, as a result of which the engine reduces power or stops working.

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Return under warranty

The return of the defective product is possible only during the period limited by current legislation (within 15 days in accordance with Article 18 of the Law on Protection of Consumer Rights). At the same time, it is required that the tool is in the same state as the buyer was released-if any defects of the case or configuration were agreed, they should not be changed. Otherwise, the seller or manufacturer has the right to refuse the buyer to replace the chainsaws with a similar one or in a refund.

We will not give specific for service for obvious reasons. in each workshop, may vary due to logistics, accessibility of spare parts or mechanisms, as well as the level of remuneration. This does not apply to the official service centers of the manufacturer, often setting fixed tariffs for their services.

Chainsaw won’t start

Service of the chainsaw STIHL MS 180

In order for your tool to work without any problems and breakdowns, you should remember several mandatory rules:

  • Start warming up the engine only after checking the tension of the circuit, only after that you can turn on the power and start the engine factory. After the plant, it is necessary to warm up the engine, and only then start work. so the saw will maintain productivity and allow you to enjoy the use;
  • The fuel mixture should be mixed immediately before using the tool. Do not interfere with the mixture “for reserve”. the fuel will break up into the fractions and will not let the instrument;
  • You can store the tool only in a dry place, in a lubricated state, as well as with an empty fuel tank. otherwise, the fuel system can be corroded, respectively, force it to spend a certain amount of repairs;
  • Do not let the chainsaw work more than the due date. the manufacturer installed it no more than twenty hours a month. Such an optimum was derived during the factory testing of the tool, and, accordingly, is aimed at extending the service life of the chainsaw.

Observing the rules of use specified in the documentation of the chainsaws, you can extend her life, and make it easier for yourself to work with the tool and not lose excessive funds for its repair.

Restoration of performance

The design of the ignition system is not too multifaceted and has only 4 main components: coil, flywheel, start button and candle. In most cases, when there is no spark in the chainsaw, the malfunction is attributed to the contamination of the contact of the candle, the failure of the module or a downed gap. By greater account, all recovery procedures are quite understandable and do not require special knowledge to implement. Of course, there are nuances that are better to know about in advance and all of them, in the form of instructions, are already presented on this site in a separate topic (checking and repairing the gas.speaker ignition system).

In the case of with an erased bearing and the beating of the flywheel during rotation, the repair takes on a more global character, affecting almost the entire system. To replace the worn element, it is necessary to get to the crankcase and divide it into 2 halves. This procedure implies the disconnection of the carburetor, twist shock absorbers, removing the cylinder, clutch and flywheel. The procedure requires time and perseverance, but can be performed even by a novice user (if desired). Exhaustive instructions for the complete analysis of the chainsaw in the details are available on the site.

Weak spark on a chainsaw

From the moment of introduction into the instrument of the new ignition system, it does not recede that the charge of low power is not able to ignite the fuel mixture. Usually, such a statement is based on comparison with old coils generating a pronounced blue spark. The charge of modern modules has a much more pale shade and a smaller range of action, which can cause doubts about its effectiveness, relatively a powerful analogue from the past.

Effective mixing of air and fuel forms an extremely combustible substance that is quite enough when a weak spark is issued on a chainsaw. The reason for reducing the charge is to optimize the work of the coil and reduce its dimensions. If there is a spark, the mixture will be ignited in 99% of cases, in the presence of normal gasoline, oil and serviceable carburetor.

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