Fills a candle on a Husqvarna chainsaw

Stalls immediately after launch:

  • The fuel mixture is not prepared correctly, there is too much oil in it, so the octane number of gasoline is less than it should be, so the chainsaw only works on suction or immediately stalls.
  • Spark plug carbon deposits or improper spark plug-to-wire gap.

Shoots at the muffler:

  • Enriched air-fuel mixture. Why does the chainsaw “shoot”? There is too much gasoline and too little air in the mixture, so the mixture does not completely burn out in the chamber and partially burns out in the muffler. Exhaust carbon is a clear sign of this. Air filter cleaning or carburetor adjustment required.

The chain falls

Why does the chain fly off the tire? There may be several reasons and they are all different:

  • Drive or driven sprocket is worn. Due to the fact that the sprocket is worn out, the adhesion to the chain decreases, which is why the chain flies off the chainsaw. Sprocket replacement required.
  • The chain has stretched out. Why does the chain stretch on a chainsaw. due to insufficient lubrication. The metal heats up and stretches, albeit by a fraction of a millimeter, but if you take into account the number of links, then even 3-4 mm is enough for the chain to fly off the tire. The chain needs to be changed.

fills, candle, husqvarna, chainsaw

  • The chain tensioner, which regulates its tension, is loosened. how to adjust the chainsaw, or rather the chain tension? You need to adjust the tensioner. this can be done in just a few minutes.

Engine stalls

The engine starts, but at idle or under load, the chainsaw stalls. In this case, most often you should perform the same actions as described above.

How to adjust your chainsaw depends on exactly when the problems begin:

Chainsaw won’t start

If there are difficulties with starting a chainsaw, many immediately sin on the carburetor. In fact, there are several options and the cause of the malfunction can be any:

  • Clogged air and / or fuel filters. The problem is solved by cleaning the filters.
  • Lack of fuel in the tank. Yes, there is such a reason. some owners forget about such an insignificant detail as refueling a chainsaw and think that a couple of liters of gasoline will last for six months. In addition, the fuel in the tank should not be stored for more than 14 days, because gasoline evaporates and octane number is lost.
  • Check the pipe from the fuel tank to the carburetor. it could be clogged or cut off, so gasoline does not enter the tank.
  • No spark on spark plug. Why there is no spark. there can be many reasons: there is no contact, you need to change the candle or it is flooded. Why pours a candle on a chainsaw is another question. But if this happens, you need to dry and reinstall, and then check for a spark. If the spark plug is heavily soaked, it is recommended to replace it.
  • Check muffler for carbon deposits. If there is carbon deposits, thoroughly clean the muffler, but it is still recommended to take the chainsaw to a service center to check the cylinder and piston there, because carbon deposits are a sure sign of improper operation of precisely the elements of the cylinder-piston group.
  • The carburetor is clogged. How to properly adjust the chainsaw so that the carburetor works well was discussed in a separate article.

If none of the above methods helped, then the reason is more serious. the breakdown of one of the nodes of the connecting rod-piston group. In this case, it is recommended to take the chainsaw to a service center.

Chainsaw saws to the side

When sawing, you will notice that the cut is uneven. Why does the chainsaw cut crooked? There are several reasons:

  • Incorrect chain sharpening. The teeth are sharpened at the wrong angle or in one direction only. Correct sharpening required.
  • Incorrect chain. At very high revs, the difference of even 0.2-0.3 mm between the width of the groove or the width of the landing will be visible, which is why the chainsaw cuts to the side. An appropriate circuit must be installed.
  • Uneven tire wear. Over time, the tire wears out on one side and then the chain is pulled to the side. Flip the tire regularly so that the wear is even on both sides. If the wear is too great, replace the tire.

The chain does not cut

The decrease in the performance of the chainsaw is associated with the bluntness of the chain teeth. This is the most common problem because sharpening should be done regularly. How to do this using a machine, file or angle grinder, read the corresponding article.

Chainsaw Husqvarna (Husqvarna) 137. carburetor adjustment.

The best advice that I can give you is to contact the specialists! Believe me, for very little money, specialists will adjust the carburetor, check the general condition of the saw. But if you still need to adjust the carburetor on your Husqvarna 137 saw yourself, then I will try to describe this process in detail. Also at the end of the post I added a video on how to adjust the carburetor of a chainsaw at idle.

detailed instructions on how to adjust the chainsaw carburetor here: How to adjust the chainsaw carburetor step by step!

Adjusting and adjusting the carburetor Husqvarna 137

husqvarna137 carburetor adjustment

In the picture above, you can see three adjustment screws. Each of them has its own purpose:
The T screw is required to adjust the idle speed.
Screw L is used to adjust low rpm.
Screw H adjusts high rpm.

Adjustment procedure:
First, with the L screw (rotating it), we look for the highest idle speed. After we have found them, it is necessary to turn this screw a quarter of a turn against the clock hand. If in this position the chain continues to rotate, then by rotating the screw T we achieve its stop.
Then we warm up the engine at full speed in the region of 10-15 seconds and turn the screw H a quarter counterclockwise. We wait 10 seconds and listen. the engine should work like a 4-stroke in sound. If a squeal is heard, then the mixture is poor (unscrew the screw), if it smokes, the mixture is enriched (tighten the screw).

After adjusting the low and high speeds, we set the idle speed with screw T. This is done as follows:
1.The engine must be running
2.Turn the screw T clockwise until the chain starts to rotate.
3.Rotate the screw in the other direction until the chain stops.

With a properly adjusted carburetor, your chainsaw quickly picks up speed and sounds like a 4-stroke engine.

Remember that a tachometer and experience are required to properly adjust the carburetor of your chainsaw. Therefore, it is better to contact a specialized service.!

Video about adjusting the chainsaw at idle speed:

Another video about Husqvarna carburetor repair in English.


Some time ago, the chainsaw was considered quite powerful, and at the same time expensive and heavy professional equipment used for logging work. However, over time, manufacturers have significantly expanded the range of such equipment, releasing many lightweight and compact products for work in a suburban area.

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Today, units such as the following photo are no longer exclusively professional equipment for lumberjacks. This is a tool useful in construction, during repair work, in cutting dry branches, in the preparation of firewood, and the like. But in order for it to work without interruption, you need to know what to do if you pour a candle on a chainsaw. Or how to repair such equipment in case of breakdowns of its other constituent parts. Let’s talk about this further.

Interruptions in work

The chainsaw is no longer considered an innovative technician, intended exclusively for professionals. Nowadays, many summer residents and owners of personal plots have a similar universal unit in their arsenal. After all, modern manufacturers offer customers a wide selection of types and models of units of this kind.

To be honest, their design is generally not overly complex. Therefore, if problems arise with their work, any more or less experienced summer resident will figure out why he pours a candle on a chainsaw on his own.

From Train Wreck To Running: Repairing A Husqvarna 445 Chainsaw

If equipment of such a plan is provided with proper use and maintenance, spark plugs for a Stihl chainsaw rarely become unusable. But if once the chainsaw did not start, you need to sort out the problem in order:

  • The spark plug for a chainsaw is an important part of this kind of units. If problems arise with it (for example, it is flooded), then they can lead to breakdown of all equipment;
  • If, when viewed, the chainsaw plug is completely dry to the touch, then this indicates a lack of fuel supply. Why is this happening? The salt of the problem is concentrated in the carburetor. Be sure to clean the fuel filter and start the engine again. Nothing happens? Then the carburetor needs to be disassembled and examined, but it is better to entrust this matter to specialists from the service center;
  • If the unit does not start, then this may indicate a problem with the spark plugs of a different nature. it is flooded. You have a Stihl chainsaw: fills a candle and the engine of the unit does not start? To fix the problem, remove the flooded spark plug and dry it thoroughly. over, it does not need to be calcined. It is enough to drain the fuel mixture from the spark plug hole and leave the part to dry for half an hour. Then put it back in place and start the engine. In addition, it is important to inspect the contact between the spark plug tip and the high voltage wire;
  • It is important to ensure that the spark plug gap of the chainsaw is correctly adjusted.


In practice, this is a tool whose main meaning is difficult to define clearly. The fact is that such equipment is universal and has a very wide range of applications. For example, it is very relevant during gardening, construction, and other types of work.

Many summer residents and gardeners purchase lightweight models for caring for fruit trees in their suburban area. That is, these days the chainsaw has undeniably become a high-performance alternative to a hand saw or ax. And almost every craftsman is familiar with the peculiarities of its operation and adjustment of the spark plug gap.

But do all the owners of summer cottages know how to repair such equipment in the event of any malfunctions in its operation? Let’s discuss further what to do if your chainsaw won’t start and floods a candle. And also let’s talk about why this happens.

Filling a candle on a chainsaw: what to do?

The engine of a high-quality chainsaw starts and runs without problems if it is provided with regular maintenance, filters are replaced in a timely manner and the carburetor is adjusted. But even if these requirements are met, sometimes unexpected breakdowns occur: the candle is flooded or its gap changes. Let’s talk in this article about the situation when pouring a candle on a chainsaw: what to do?

Why is pouring a candle?

Why Problems Happen

Why is pouring a candle on a Stihl chainsaw? The answer is simple: this happens when the unit is started by an inexperienced user who does not follow the correct sequence for starting the equipment on a cold.

This can damage the spark plug tip. To verify that there is a similar problem, unscrew the plug and insert it into the tip. Then place the part on the block and pull the starter cord several times. In the presence of a spark, you can not worry about the electrics and the state of the candle.

Be sure to check that the spark plug gap of the chainsaw has been adjusted correctly.

The following is a helpful video on how to use your chainsaw correctly.

6 comments on the entry “Fills a candle on a chainsaw: what to do?”

So much verbal diarrhea.
A chainsaw is definitely a necessary, important, irreplaceable thing.!
And what gap in the candle should be and did not say.

I need a description on lawn mower spark plugs

totally agree about demagoguery.

The gap in the candle is 0.5 mm). Both in the saw and in the trimmer)

Dviglo 2-stroke. there should not be a large gap)

Risks of using low-quality fuel

Various low-octane gasolines and fuel surrogates contain alcohol components, which take longer to complete combustion. The efficiency of using such fuel is questionable, since there are a number of factors that confirm ineffective operation and forced engine wear.

The oiling of the spark plug is facilitated by the use of heat-resistant engine oils for 4-stroke engines, high wear of the compression rings or the entire piston group as a whole.

Consequences of engine operation with unadjusted fuel equipment

The traction characteristics of the engine and the duration of its resource depend on the composition of the mixture.

  • Working on a lean mixture initiates a drop in power, overheating of the cylinder and intense wear of loaded parts and units of the chainsaw.
  • Working with a rich mixture is no less dangerous. The malfunction is manifested by an increase in the time to reach operating speed, increased fuel consumption, smoke from the muffler.
  • There is also an intense formation of carbon deposits in the combustion chamber, loss of mobility of the piston rings.

Troubleshooting Tips

In the first case, the problem is solved by bringing the air intake device into serviceable condition. It is recommended that a paper filter has exhausted its resource be blown out with a reverse air flow, at best it should be replaced. For other types of filter cleaning, refer to the enclosed operating instructions.

  • The carburetor is adjusted with the engine warmed up to operating temperature. The power unit is brought to the optimal mode by rotating the adjusting screws for the amount and quality of the mixture. The success of the work is determined by knowledge of the design of the fuel supply system, the interaction of all components.
  • In particular, the increased complexity of adjusting carburetors with built-in compensators and other automatic controls. Such equipment is configured with the help of special equipment, which is equipped with service and repair centers.

If the engine does not lend itself to tuning, the cause of the excess fuel in the emulsion may be a leakage of the valve or the hang of the carburetor float itself.

The end result of the work performed:

  • fast set of revolutions;
  • stable operation at idle;
  • restoration of traction parameters;
  • lack of increased smoke and detonation noise.

Chainsaw wet candle: why and what to do

Household and professional chainsaws are equipped with two-stroke internal combustion engines that are simple in design and reliable in operation. A large proportion of drive failures are due to malfunctions in the fuel system. Why is pouring a candle on a chainsaw and how to fix this malfunction with your own hands?

Components for the entire range of chainsaw power units operate on a precisely metered mixture of fuel and special engine oil intended for operation of two-stroke engines.

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In the carburetor, fuel and air are mixed in a ratio of 1:16, after which the air-gasoline emulsion is fed into the combustion chamber.

Algorithm for determining the causes of poor mixture formation

In any case, a wet candle on a chainsaw indicates a pronounced imbalance in the composition of the air-fuel emulsion. Already at a fuel-to-air ratio of 1:14, the conditions for sparking deteriorate, the lack of air prevents the normal combustion of the fuel-air emulsion compressed in the combustion chamber.

The main reasons for the over-enrichment of the mixture are in most cases standard:

  • clogged air intake filter;
  • incorrect carburetor adjustment;
  • interruptions in the operation of the ignition system;
  • also, poor quality of gasoline and a violation of the starting sequence of the power unit are not excluded.

Criteria for the selection and operation of spark plugs

The simplest indicator of the quality of the mixture is the porcelain insulator of the center electrode of the spark plug. Any shade of brown indicates normal mix quality, white or smoked insulator indicates poor or over-enriched emulsion composition.

The glow number of the plug in use must meet the stated requirements.

  • The cause of oiling can be the so-called “cold” candle, which can be visually identified by the short insulator. Interruptions in sparking are possible if the gap is incorrectly adjusted or due to natural burnout of the contacts.
  • The recommended distance between the contacts of the candle is indicated in the instructions; in the absence of information, you can focus on the standard value of 0.7-1 mm. With a smaller gap, the efficiency of ignition of the fuel-air emulsion decreases, with an increased gap, interruptions in sparking are possible.
  • It is not recommended to burn a damp or oily candle in an open flame due to the risk of cracking and premature failure.

Re-enrichment of the mixture in the combustion chamber of a technically sound chainsaw is eliminated by purging the engine. To do this, just unscrew the plug and turn the crankshaft several times with a manual starter.

Ignition coil problem

To make sure the ignition coil is working properly, you must be able to use a multimeter. This device allows you to measure the degree of resistance of the coil. A good coil will have resistance. In a burnt-out. open circuit or short circuit.

If the coil is in good condition, then the gap between the coil and the flywheel may be broken. To set it up, you need to follow a series of simple steps:

  • Dismantling the saw body and loosening the bolts that secure the ignition system. The magnet (magneto) of the flywheel must be brought to the coil itself.
  • An adjusting plate is inserted between the flywheel magneto and the coil itself. The gap should be within 0.2mm.
  • After tightening the bolts, the adjustment plate is removed.
  • It is imperative to turn the flywheel completely and several times (2-3 will be enough). However, it should not cling to the coil.
  • The final stage is the assembly of the chainsaw body.

Poor quality fuel

The chemical composition of low-octane gasoline includes various alcohol components. For their complete combustion, it takes more time than when using high-quality fuel, respectively, this becomes the main reason for the failure of the chainsaw plug.

Unfortunately, many citizens naively believe that fuel with the inclusion of alcohol has a positive effect on gasoline consumption and purchase fuel surrogates. In a number of cases, efficiency really does take place, however, such a fuel negatively affects the chainsaw engine, shortening its service life.

Wrong clearance

For the most part, the gap on the chainsaw spark plug should be within 0.5. 1.2 millimeters (more accurate data should be reflected in the user manual). In order to check whether this is so, you must perform the following steps:

  • Using a screwdriver or special keys, unscrew the bolts that fix the chainsaw cover.
  • Having gained access to the flywheel and magnetic circuit, the clearance level is checked.
  • If it does not correspond to the characteristics declared by the manufacturers, then using a special gasket or improvised means (a regular A4 sheet folded several times is perfect), the required distance is set.

How to Fill Your Chainsaw’s Fuel Tank | Husqvarna

Why is pouring a candle on a chainsaw: reasons

The main cause of a flooded spark plug on a chainsaw is excessive fuel consumption and can be caused by various reasons, in particular:

  • Poor quality gasoline.
  • Incorrect chainsaw starting algorithm, which inexperienced owners often “sin”.
  • Clogged air filter that can no longer cope with its function.
  • Failure of the ignition system.
  • Unadjusted carburetor operation.

Wrong start

As a rule, during the first start of the chainsaw, inexperienced men skip the “pop” with the air damper closed and continue to pull the starter. Because of this, a large amount of fuel accumulates in the combustion chamber, but the air is critically short. The candle is filled with excess gasoline and there can be no question of any spark.

What to do if a candle is flooded on a chainsaw

If you suspect a flooded candle, you must inspect it. With the help of a candle wrench, it is unscrewed and carefully examined. If the candle is wet, but there is a spark, then it was definitely flooded.

Many experienced owners are more likely to determine the current state of a candle by its color. This procedure is recommended to be carried out regularly.

  • Light brown carbon deposits are exactly what all owners want to see. In this case, the functionality of the chainsaw is not impaired.
  • Black carbon deposits indicate an imbalanced mixture, namely a lack of oxygen in the fuel chamber. If the situation does not improve, there is a high probability of re-filling the chainsaw plug.
  • If corrosion is detected on the plug or the distance between the electrodes is too large, then most likely a lean mixture is used.

Failure to adjust the carburetor

Often the candle on the chainsaw is flooded due to improper operation of the carburetor. For greater clarity, we recommend watching this video.

If this is your first time setting up your carburetor yourself, pay attention to the following factors:

  • The presence of built-in expansion joints and other automatic control elements makes it impossible to adjust without special equipment. In this regard, you will have to contact a specialized service center.
  • In the absence of the proper effect from adjusting the carburetor, the reason for the filling of the spark plug will be whether the float hangs or the valve is not tight.

Clogged filter

Due to the heavy contamination of the paper filter of the chainsaw, sufficient oxygen does not enter the fuel chamber. The fuel mixture has no time to ignite and gasoline fills the spark plug. If the filter has already exhausted its resource (this will be noticeable by its appearance), then it must be replaced. If you do not have a new filter at hand, but you still need to work, then you can try to blow the filter with a reverse air flow.

Chainsaws from different brands and models differ from each other. To clean or change the filter, it will be superfluous to first look at the instruction manual. Well, or look there if you cannot remove the filter without prompts.

Avoid using ethanol fuel

When the Stihl chainsaw is poured, one can suspect the fault of low-quality fuel. Regardless of the condition of the plug after 100 hours of operation, Stihl recommends replacing it with a new one. Use a resistor type plug and check the manual for your Stihl chainsaw model by going to the page for recommended replacements. If the plug needs to be replaced because it is badly worn, it may be due to the use of gasoline with ethanol added.

Ethanol burns differently than gasoline and can cause the engine to overheat. One of the symptoms of this is worn out electrodes, and then flooding of the candle. Stihl recommends ethanol-free 89 octane gasoline. In no case should gasoline contain more than 10% ethanol.

Troubleshooting tips

If the chainsaw candle was still flooded, and you do not want to wait for the fuel to drain, there is a rather effective and prompt cleaning method.

  • If the repair takes place in the field, then the saw is installed on a flat surface (in the workshop everything is easier. the table is to help), after that the explosive wire is pulled from the candle and the candle is taken out with the help of the key, its electrodes of the candle are wiped dry. In this case, the circuit opening system must be turned on.
  • The cover of the air filter is unscrewed, which is cleared of dirt.
  • After that, the control lever is set to the minimum throttle position, and the starting cord is twitched up to 10 times, but not less than 5. Thus, the combustion chamber is cleared of excess fuel.
  • After putting back the air filter, installing the spark plug and connecting the wire, pull the starter cord a few more times. In this case, the throttle valve must remain open.
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If these actions are performed correctly, the saw will “come to life” again.

Most owners of chainsaws have repeatedly filled in candles and at the same time themselves have returned functionality to the tool more than once. Do not be afraid of this problem: straight arms and the availability of a user manual will help you continue to use the tool without contacting a specialized center.

Everything whole, clean, works?

Trying to adjust. We take a long screwdriver, find the idle speed adjustment bolt (it is located on the throttle valve), twist it a couple of turns so that the damper opens slightly. We start. Does it work smoothly? Then let’s move on. Doesn’t it start or stalls? Opens the damper until it starts up stably.

Then we adjust the quality of the mixture with screw L. It is necessary to achieve maximum idle speed. Here the principle is reversed. the more the bolt is unscrewed, the richer the mixture. After that, the quality of the mixture is adjusted at maximum speed with the screw H.

If the carburetor adjustment has not yielded fruit, then it needs to be disassembled. Watch the membrane, clean the jets and internal passages. For this, it is necessary not only to have a repair kit, but also, preferably, a spare carburetor.

The second is the carburetor

It is not necessary to disassemble the unit right away, especially if the engine stalls after starting or does not keep idling. Try changing the fuel first, it may have an excess of oil. You can inject a purifier into the air filter, let the motor “shit a little” at maximum speed.

Next, we go in order. the air filter, the fuel filter (it can be outside and in the tank), the fuel pumping button, the integrity of the hoses. Gas tank cap. the ventilation valve may be clogged, the motor simply does not pump gasoline. Blow everything out. and it will work!

Be sure to. look at the connection of the carburetor to the intake manifold! Elsi sucks air there and there is no tightness. eliminate!

The dosing needle hangs up. also a problem in some models. It is enough to push it down, or remove and grind it with velvet.

You can pull off the hose from the carburetor, see if fuel goes to it when pumping. It is clear that often for checking you need to remove the plastic sheathing, break your fingers on the latches, but anyway, sooner or later you will have to climb there.

What to do

If the chainsaw engine does not start, and there are traces of fuel and oil on the spark plug electrodes, it is necessary to establish the reason for their appearance. This will determine what needs to be done to eliminate it. If the fuel is thrown when starting the unit, then it is necessary to remove the fuel mixture accumulated in the engine crankcase. To do this, turn out the candle, turn the chainsaw over with the cylinder down and turn the crankshaft with a manual starter. Such manipulations must be done at least 25-30 times.

After that, the removed part is installed in place and the engine is started in accordance with the operating instructions. If interruptions occur during the operation of the unit, then this indicates a defect in the spark plug. Over time, the electrodes of the spark-generating device burn out, as a result of which the gap between them increases. This results in a weak spark that cannot ignite the fuel.

Unburned fuel settles on the electrodes and the sparking stops.

The gap is adjusted using a feeler gauge. For two-stroke engines, the distance between the electrodes should be 0.7-0.9 mm. Splashing of the contacts can occur due to an overly enriched mixture. This leads to a violation of the carburetor adjustment or clogging of the air filter.

The device is adjusted on a warm engine. By rotating the screws, the maximum possible stable speed is achieved. If the owner of the unit did not adjust the carburetor, then it is worth contacting a specialist.

Why is pouring a candle on a chainsaw?

When pouring a candle on a chainsaw, you must immediately carry out a thorough check of the tool.

  • Checking the plug. Part of regular maintenance for a Stihl chain saw is to remove the plug and inspect it (recommended every 10-15 hours of operation.) If the engine is running normally, the outer electrode is likely to be covered with light brown deposits. The operator must check the electrode gap with a special tool. If the engine is running normally, the problem manifests itself in the condition of the plug. Thick black deposits indicate that the fuel / air mixture is unbalanced. In other words, there is not enough air in the mixture. On the other hand, wide slits or corroded electrodes are indicative of a lean mixture. Oil on the plug indicates a leak.
  • Clean or replace? If the fork is covered with light brown deposits and the clearance is correct, the operator does not need to do anything with the fork. It is enough to put it back in place, and the chainsaw should continue to work normally. If it is covered with black deposits or oil, remove this layer with sandpaper. If necessary, adjust the gap with pliers. One of the conditions indicating the need for replacement is electrode wear. If the engine stalls, you need to check it with a spark plug tester and replace it if the spark is not strong or appears every time.

Troubleshooting Tips

In the first case, the problem is solved by bringing the air intake device into serviceable condition. It is recommended that a paper filter has exhausted its resource be blown out with a reverse air flow, at best it should be replaced. For other types of filter cleaning, refer to the enclosed operating instructions.

  • The carburetor is adjusted with the engine warmed up to operating temperature. The power unit is brought to the optimal mode by rotating the adjusting screws for the amount and quality of the mixture. The success of the work is determined by knowledge of the design of the fuel supply system, the interaction of all components.
  • In particular, the increased complexity of adjusting carburetors with built-in compensators and other automatic controls. Such equipment is configured with the help of special equipment, which is equipped with service and repair centers.

If the engine does not lend itself to tuning, the cause of the excess fuel in the emulsion may be a leakage of the valve or the hang of the carburetor float itself.

The end result of the work performed:

  • fast set of revolutions;
  • stable operation at idle;
  • restoration of traction parameters;
  • lack of increased smoke and detonation noise.

Why pouring a candle on a chainsaw and what to do