Husqvarna 236 Doesn’t Start Causes

Damage can occur even in the most expensive garden equipment. But if the chainsaw does not start, this does not mean that it is time to buy a new one or pay for the expensive services of repair masters. Most of the problems associated with this problem are not global and can be easily fixed with your own hands. The main thing is to correctly determine the reason why the chainsaw refused to properly perform its functions.

Husqvarna 236 Doesnt Start Causes

Switching device

The key role in any chainsaw is played by a carburetor power unit of the push-pull type. Its power directly depends on the chosen model and purpose. The second important mechanical unit in the device is the saw part, which consists of a tire, a cutting chain and a sprocket. The parameters of these components may vary.

Processing with lubricant mixtures is carried out using special oil, which is poured into a specialized tank, it is located on the hand block. Separately, it should be emphasized that the volumes of the oil tank and fuel are calculated in such a way that their contents, as a rule, end at the same time.

Fault options and solutions

Regardless of the brand of the chainsaw. Champion, Husqvarna 236 or Patriot, the causes of poor performance are identical. There are a lot of options why the Stihl chainsaw does not start, but the following are the most common.

Chainsaw fails to start cold

If the saw does not start up cold, it means that there is no compression in it. This is due to abrasion of the rings due to prolonged use. It turns out that when a user tries 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 still start up, but other mechanical components may break. In this situation, you need to replace the erased rings with new ones.

Chainsaw doesn’t start up hot

Here the reasons lie in the engine fill and wet candles. Here’s what to do in this situation:

  • Move the air damper to the middle position;
  • Blow out the component parts well;
  • Start the device for 10 seconds;
  • Put into idle mode;
  • On a chainsaw gauge or other model, fully open the shutter.

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

If this troubleshooting option did not help, then the motor has already managed to cool down very much. Fix half-gas according to the recommendations from the instructions and repeat the operation.

You should also try turning the cold screw in the clockwise direction. The higher the rotation speed in the equipment, the easier it is to start it. You should know that the circuit at idle should remain stationary.

Video: Why the saw starts up badly or stalls and how to fix it

The chainsaw starts up badly and immediately stalls

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

Removing the candle and thoroughly drying it will help to solve the problem. In addition to these actions, it is additionally possible to carry out heating. But this manipulation should be carried out exclusively with the help of a gas burner. In another case, a small deposit may form in the area of ​​the electrodes. After the candles are completely dried, excess fuel must be drained and the equipment itself left to dry.

Chinese saw does not start

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

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

Video: How to properly adjust the carburetor so that it does not stall

Why the new saw doesn’t work

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

Husqvarna chainsaw repair scheme

First of all, you should check whether all the parts and components are in place. For example, Husqvarna will not start if it was poured into a fuel mixture prepared without taking into account the necessary proportions.

But if all the recommendations are followed, each detail is carefully fixed in its place and the equipment was not purchased from the stand, probably the buyer got a defective device.

There is not enough fuel in the tank or it is of poor quality

This is one of the most common reasons. Users of gasoline equipment, in order to save, often use low-cost fuel. At first, the unit will do its job properly, but the problem will surely arise after several months of operation.

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

Filter Issues

Contaminated filters are one of the main factors for not starting a chainsaw. Check the air filter for cleanliness, it is located under the housing-cover. The fuel cleaner is located directly in the fuel tank.

Location of the air filter and spark plug

In addition, you should inspect the breather in the gas tank. For diagnostics, for a while, you should remove all possibly clogged parts, start the device without them.

How to “run in” a chainsaw

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

  1. First you need to prepare a fuel mixture, the proportions of which depend on power:
  • For engines with speeds up to 5000 rpm, the optimal proportions of oil and gasoline are 1:25;
  • For engines with speeds up to 120,000 rpm, the ratio of oil to gasoline is different. 1:50.
  1. Fill the fuel tank and turn on the saw at medium power.
  2. Give 4-5 minutes to work, then 15-20 seconds at idle, and so on, until the fuel runs out.
  3. In this mode, start 5-10 cycles, after which you can begin to fully work at full power.

When you need to refill the tool, you need to wait for it to cool completely. It is strictly forbidden to fill the fuel mixture in a hot engine. This can lead to traumatic situations. And always refuel away from flammable objects.

Some chainsaw models have 2 separate tanks. For gasoline and for oil, already in the process, the components are mixed together in the right proportions. Before refueling, make sure which type of refueling you have in order to prevent excess oil.

What the wrong choice of fuel leads to

Serviceability depends on the quality of fuel and oil, as well as on the correct proportion of components. If you make a mistake, this leads to a number of problems. In the best case, the unit simply will not start, in the worst it will fail, and this does not fall under warranty repair.

If less oil is poured into the gasoline, scuffing will appear on the cylinder. Longitudinal small scratches that worsen over time. It is impossible to overwrite or repair, the part will have to be changed entirely. The price of a workpiece is more than half the cost of the saw itself.

With low-quality oil or fuel, the power of the tool drops sharply, a burning substance, smoke appears, the saw makes a noise more than usual. It is enough 2-3 such launches to have to clean from soot. This is easy to do. Through the hole for the candle, you don’t even have to disassemble the motor.

Video: Little tricks of a Chinese chainsaw

Simple in design and reliable in operation, chainsaws are very popular among owners of private houses and summer residents. With proper handling of this tool, it works for a long time and rarely breaks. Over, eliminating the cause of the malfunction of the chainsaw will not be difficult with your own hands, especially if you know where to look for the cause.

Husqvarna Chainsaws. Major Malfunctions

The tool of the Swedish manufacturer is able to turn hard work into a simple task. Husqvarna 137, Husqvarna 240 and Husqvarna 365 chainsaw models distinguishes three features:

  • High engine power;
  • Improved engine filtration system;
  • The ability to absorb excessive vibrations.

If the tool is operated strictly according to the instructions and its problems are timely eliminated, then it will delight reliable and stable operation. Correctly carried out repairs with original spare parts will allow you to use the saw for a long time.

The main cause of chain saw breakdowns are most often engine failures, which can manifest as follows:

  • Do not start;
  • Unstable idling;
  • Start and immediately stall;
  • Not have enough power.

In this case, the malfunction should be sought in the ignition system, piston group or fuel system. Often, the cause of poor tool performance can be related to the clutch, brake system, lubrication mechanisms, and tire.

Ignition system

Do-it-yourself repair of the Husqvarna 240 chainsaw, and of any other model, should begin with troubleshooting the ignition system.

First of all, experts recommend get out and inspect the candle. The condition of this element will indicate defects in the operation of the fuel system.

  1. If the candle is completely dry, it means that the fuel mixture does not enter the cylinder. In this case, the candle is screwed into place and the fuel system is repaired.
  2. If the spark plug is heavily filled with fuel mixture, the rules for starting the unit may be violated, or the carburetor is poorly adjusted. It is necessary to shut off the fuel supply and start the starter. This is done in order to remove excess fuel. The candle must first be cleaned with a sharp object, then washed with detergents, blow dry and put in place. After that, the tool is launched and its operation is checked.
  3. If there is no remaining fuel on the candle, it must be cleaned, washed and checked for sparks. Its absence may indicate a violation of the gap between the flywheel and its magnetic circuit or a breakdown of the ignition module.

A malfunction in the ignition system may be due to the use of bad oil or to the wrong ratio of gasoline to oil.

Fuel supply system

If fuel does not enter the chainsaw tank, then this may be two reasons:

  1. Filter clogged.
  2. The lid is clogged.

In this case, the fuel is not supplied in full, and the tool does not start or starts and immediately stalls. Repair consists in cleaning the air filter and cover.

The filter must be removed very carefully so that the dirt that clogs it does not get into the carburetor. It is cleaned and washed with ordinary detergents.

Carburetor repair

The heart of any chainsaw is a carburetor, with which most tool failures are associated.

Do-it-yourself repair of this assembly consists in disassembling and cleaning. If the damage is serious, contact a service center for help.

Most often, instrument malfunctions are associated with the use of low quality gasoline or oil. To protect the carburetor from damage, it is necessary to observe some preventive measures:

  1. Start the chainsaw strictly according to the instructions.
  2. It is not recommended to store gasoline in a plastic container. This will help to avoid strong soot.
  3. The fuel mixture cannot be stored for a long time, as over time it loses its quality.

Do-it-yourself Stihl chainsaw repair

This brand is very popular among both individuals and professionals. This easy-to-use and reliable tool can last a long time without repair. There are situations when the Stihl chainsaw does not start or stalls immediately after the factory. What to do in these cases can be found by watching the instruction.

If the chainsaw does not start

The reasons must be sought sequentially, moving from simple to complex. Do not immediately disassemble the carburetor, which is equipped with many different parts and small elements.

First of all necessary check fuel availability and pay attention to its preparation. The mixture should consist of high-quality gasoline and oil, the brand of which is indicated in the instructions attached to the saw.

The saw may not start due to the fact that at the time of launch the candle is filled with gasoline. The problem is eliminated by drying or replacing the candles, and draining the excess fuel.

Quite often, if there is poor contact between the tip of the plug and the high-voltage wire attached to it, there may be no spark. In this case, the connection should be restored. If even after this a spark does not appear, then most likely the electronic ignition unit is faulty. It must be replaced with a new one.

You can not count on the easy start-up and operation of the chainsaw if its filter is clogged. It must be removed, cleaned and washed well, paying particular attention to the mesh.

Sometimes the saw engine does not start due to malfunction of the piston group. In this case, for repair you will need:

  1. Remove bolts and remove cylinder from block.
  2. Check the integrity of the piston and cylinder.
  3. If the cylinder is damaged, then it must be replaced with a new one, or repair by boring a mirror to the size of the piston.
  4. Find out the wear of the piston rings and replace if necessary.

For a tool that worked on relatively normal fuel, such procedures are quite enough. Now you can saw reassemble.

Some parts of the Husqvarna and Stihl chainsaws must be changed after the passport service life. These terms are spelled out in the instructions attached to the instrument. It also indicates how to properly start the tool. Acting according to the instructions, distinguishing between cold and hot start and using the chainsaw strictly for its intended purpose, it will be very rare to repair it.

Every person who is familiar with gasoline powered tools knows that sometimes the equipment works intermittently, and may stall at one point and no longer start up. There are a lot of reasons why a chainsaw does not start, we will try to consider the most common of them.

Why the chainsaw starts badly

  • Fuel and air filters;
  • Reduced compression;
  • Carburetor adjustment;
  • Spark plug;
  • Ignition coil;
  • The gap between the ignition coil and the flywheel;

Consider each reason in more detail.

Fuel and air filter

Contamination of the main filtering elements of a chainsaw adversely affects its operation.

For example, a dirty air filter will not provide full air supply to the carburetor, which will affect the quality of the air-fuel mixture and normal engine starting. Contamination of the fuel filter will make it difficult, or even block the supply of gasoline to the carburetor and make the engine impossible.

Reduced compression

One of the frequent cases of difficult start-up of a chainsaw is the wear of a CPG (cylinder-piston group).

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

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

The reasons for the lack of compression, or its reduction, may be natural, because the engine wears out during operation. Problems can also be caused by a serious breakdown, for example, a scuff of the CPG, or a breakdown of the piston ring.

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

Carb adjustment

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

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

Excess gasoline in the mixture is usually called overflow. The characteristic signs of overflow, this is a wet spark plug, after several unsuccessful attempts to start the chainsaw.

Spark plug

The spark plug is one of the main elements of the ignition system. A spark forms on its electrodes, and if this element fails, it will be difficult to start up, or not at all possible.

A candle can completely fail, or intermittently or give off a faint spark. Checking the spark plug is quite simple, for this you need to unscrew it from the engine, attach it to the cap of the high-voltage wire and, laying on the cylinder, pull the starter. If the candle is in order, the spark will be powerful with a bluish tint. A faint spark with a reddish tint, a sign of a problem. Defective candle must be replaced.

Ignition coil

The reason that a new chainsaw does not start, or starts poorly, may be the ignition coil. Modern chainsaws are equipped with electronic ignition coils. This part cannot be repaired, and, as a rule, if there is a defect, it changes completely.

Clearance between ignition coil and flywheel

An incorrectly set 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-up and stable operation of the engine.

Chainsaw doesn’t start up hot

In those cases when the chainsaw does not start up hot, you need to conduct a visual inspection of all the main components of the chainsaw. Inspection should begin with a spark plug. Check the spark, inspect the surface of the electrode of the candle, these actions will help establish the direction in which to look for the problem.

Malfunctions in the ignition system

If, when inspecting the spark plug, it is found that it is wet and sparking does not occur at the contacts, this means that the problem should be looked for in the ignition system, inspected the coil, check the clearance between the flywheel and the contacts of the coil. You can also check how tightly the cap of the high-voltage wire sits on the candle, and the candle itself. Try to replace it with a new one.

Fuel system problems

If during the inspection it was found that there is a spark, and the candle is dry, then there are problems in the fuel system. Its check should begin with the fuel filter. Next, you need to inspect the fuel hose and its attachment to the carburetor, pay attention to fuel leaks from the carburetor and the presence of gasoline in the air filter housing. It is advisable to start removing the carburetor only if a visual inspection did not allow to determine the cause of the breakdown.

A characteristic sign of a problem in the fuel system is an excessive amount of fuel in the engine cylinder. As a rule, the signs of this are an excessively wet spark plug and the presence of a spark at the contacts of the spark plug. In this situation, it is necessary to turn the chainsaw so that the candle hole is directed to the bottom. If at the same time gasoline flows from the cylinder, then the reason that the chainsaw does not start is because fuel is poured into the engine.

“Fills” with fuel, sometimes due to incorrect carburetor adjustment, or its malfunction.

The carburetor adjustment process can be found on the example of the Champion 254 saw, by watching the instruction.

Chainsaw fails to start cold

Violation of the sequence of actions when starting on a cold

If a new chainsaw does not start in the cold, then the reason may be in the wrong sequence for starting the engine. As a rule, each manufacturer in the instructions for the chainsaw, indicates the procedure for starting a chainsaw in the cold. Basically, it is similar for all two-stroke internal combustion engines that are installed on chainsaws, and represents the following procedure.

  • Closing the air damper (necessary for fuel enrichment during start-up).
  • Fuel suction using a special primer for this (on some models of chainsaws, the primer is not provided for by design, and therefore this item is not available for them).
  • Turn on the ignition (if you forget about it, then you can mistakenly consider the tool to be faulty).
  • Carry out a few movements of the starter, before the first “flash” of the engine (it is important not to miss this moment, otherwise it is possible to “fill in” the engine).
  • Set choke to open position.
  • Start the chainsaw engine.

Fuel problems

As in the case of a difficult start for hot start, problems in the fuel system can affect both the start or the inability to make it and the cold one. Adjustment of the carburetor, contamination of the fuel filter and line, all these are the reasons that cause difficulties at start-up.

Diagnose the fuel system, this is the first thing you need when it is difficult to start on a cold.

It is worth paying attention to fuel quality, as when using a mixture of gasoline with oil, in which there is a small amount of water, it can be difficult to start up or become impossible.

The mixture must be used fairly fresh, because when storing gasoline diluted with oil for more than a month, its properties are lost and complicates starting, both on a cold and a hot engine. Gasoline for this reason can burn poorly.

Engine malfunctions

Cpg scuffing, sticking rings, CPG wear, air intake through gaskets and gaskets, lower compression, all these problems can make starting a chainsaw impossible or substantially difficult. For example, with not significant wear on the CPG, compression in the engine is reduced. In this case, starting up on the “cold” one will be much more difficult, or the saw may stop starting up, and on the “hot” one, the instrument will start up well.

It is quite difficult to accurately diagnose problems in the engine associated with problems in starting it, and it is better to contact a specialist in this field.

The chainsaw has stalled and will not start

If the tool stalls and does not start for a start, it is worth checking the presence of fuel in the tank. Oddly enough this sounds, but many people forget about it and when a similar situation arises, they immediately try to repair the tool, which can lead to serious breakdowns.

In a situation where the saw has died out and there is still gas in the tank, you need to evaluate how the saw worked up to this point. Maybe when working at the last moment there was an extraneous sound, rattle, ringing, there was a loss of power or the instrument stopped abruptly. All this allows you to pre-assess the situation.

Engine jammed

Quite often there is a situation when the saw worked and died out abruptly, which was caused by engine jamming, which in turn occurred as a result of a break in the piston skirt, destruction of the crankshaft bearing, departure of the corkscrew of the piston pin, or rupture of the piston ring.

Jamming of the engine is easy to determine by pulling the starter cord. In the case when the starter does not crank, most likely it has jammed, and further repairs are possible only in the service center.

Fuel wire break

During operation of the chainsaw, vibration occurs that can cause damage or breaks in the fuel line of the chainsaw. In this case, the chainsaw stalls and it will be impossible to start. To diagnose a malfunction, it is necessary to conduct an inspection and determine the presence of fuel leaks.


Overheating of the engine during operation may cause the saw to stall and not start. Overheating is quite dangerous, as it can cause the piston to melt in the cylinder and jam the engine. In the first cases of overheating, it is worthwhile to diagnose the instrument for the presence of foreign air into the engine, and adjust the carburetor.

Air leaks, as well as incorrect carburetor adjustments affect the maximum number of engine revolutions and its lubrication, which in turn causes overheating and wedging of the tool.

The main reasons why the chainsaw does not start in the. The will be useful to those who quickly want to start a saw, the author gives practical advice.

If a situation arises when the chainsaw does not start, it is important to correctly diagnose, determine the direction in which to look for a malfunction. You should not use a tool that does not work at idle, as this indicates the presence of air leakage into the engine and can lead to serious problems. If experience in repairing chainsaws is not enough, it is better to contact a specialist who will save your time and nerves.