DIY chainsaw repair makita dcs34

In detail: DIY repair of a dcs34 chainsaw from a real master for the site my.housecope.com.

Today I tried to work a little with a Makita DCS34 chainsaw. The saw stalled during operation. I pushed on the primer, but the fuel is not supplied to it. I thought the filter was clogged - no. The filter is clean. When I press the primer, air enters the gas tank, but the fuel is not sucked out of the gas tank. When I removed the top cover, I found a thin pipe, similar to the one that was lowered into the gas tank, which was probably connected somewhere. It seems to me that there is fuel on it, where it should go from somewhere, but I cannot connect it back, I can not crawl. As I understand it, you need to disassemble the saw and connect the branch pipe, but how to disassemble it? Before that, I had nothing to do with saws.

Chainsaw primer working principle - Pump fuel through the carburetor. The chain is built like this: Fuel goes through the fuel line to the carburetor, and from the carburetor to the primer, from the primer back to the tank. Accordingly, the flown-off pipe was connected to the carburetor. As a rule, the place is quite easily accessible, it is enough to remove the protective covers or the casing.

How to install a tire and chain on a Makita 35 chainsaw?

Using the allen key supplied with the chain saw, proceed as follows. Place the chain saw on a stable surface and follow the steps below to install the bar and chain. Release the chain brake by pulling the hand guard in the direction of the arrow. Unscrew the locknuts. Pull off the sprocket guard. Return the chain tension to the left (counterclockwise) so that the chain tensioner bar is below the threaded pin. Install the tire. Make sure the bar of the chain tensioner fits into the hole in the bar. Lift the chain over the sprocket. Pull the chain around the end sprocket of the Makita chainsaw bar in the direction of the arrow. Replace the sprocket guard. Lift the saw chain over the chain stop. Tighten the locknuts securely by hand.

Video (click to play).

Chainsaw Makita DCS34. It looks like it was used a little carelessly - I had to replace the tire, there are signs of overheating of the clutch basket. Otherwise, it works fine and cuts well enough. The problem is this: it starts up normally on a cold one and works fine on idle. after warming up and several cuts when the gas is released, the idle speed becomes greater than when working before sawing (after starting the saw works with full warming up at normal speed for a long time without problems until you gas a couple of times, which, in my opinion, leads to a slight rubbing of the clutch discs baskets - the force is still not enough to rotate the chain, and as a result the clutch basket heats up. Like this. Help with advice, who will say what?

Check all throttle controls for binding. If the throttle stick is forcibly pushed back, the rpm should drop.

Chainsaw Makita 34 - a problem with the oil pump, tired of changing. What to do?

The problem may not be the pump, but the oil or pump drive. The drive is a metal spiral on the crankshaft shaft. If the distance between the turns is broken or a splinter has fallen, then the teeth will wear intensively on the next pump.

The problem with starting was found on the Makita 35 chainsaw. It is very difficult to turn the saw with the starter, there is not enough revolutions to start, that is, I pull, but it goes very hard. He turned out the candle, then it turned perfectly. He wrapped the candle, the saw started up. I worked, drowned out - do not scroll again. It seems that I'm not scrolling a 45-cube engine, but at least a 1.5-liter car engine.I'll take it to the service, here is the German assembly. Does her clutch wedge? Nobody has encountered such a malfunction?

Not a grip. The construct is such that it does not affect. Perhaps oil was poured into gasoline.

How to properly preserve the Makita DCS 34 chainsaw for long-term storage, for example, for the winter, is it better to drain the chain oil?

For stoppages longer than 3 months: Empty the fuel tank in a well-ventilated place and clean it. Leave the carburetor running until the fuel is completely consumed, otherwise the membranes in the carburetor may stick together. Remove the saw chain and guide bar, clean and spray with protective oil. Thoroughly clean the tool, especially the ribs
cylinder and air filter. When using ecological chain oil, fill the oil tank completely. Store the device in a dry and safe place. Everything that is in the instructions and no pouring oil into the CPG.

Chainsaw Makita DCS34. Last week I started sawing - I made 2 cuts - it stalled until I changed the candle and started it. Candle in soot, all black. Before that, I changed the candle once a year (home use). After that, it began - the candle is poured, the saw will not start. He took off the carburetor, washed it in gasoline, blew it - it started up for 5 minutes, then the same thing. Now the chain saw does not start at all, the candle is flooded, there is no flash in the cylinder at all. My personal opinion is something like this - either the wear of the rubber gaskets in the carburetor, which act as valves; or an ignition malfunction - a shift in the ignition timing is possible. The compression is normal, like a new one, the spark is excellent, gasoline is supplied to the carburetor, the carburetor is clean, the H and L channels are blown out, the adjusting screws are not broken off. What could be?

In a chain saw, the ignition timing is not regulated, only the gap between the magnet on the flywheel and the coil is set, if there is a spark, then the ignition has nothing to do with, except in rare cases when the coil itself is buggy. The carburetor is more likely to be faulty. The most sensible advice can only be given by a competent and honest master after diagnosis.

The spark on the Makita chainsaw is gone. Where can I get instructions for setting up the ignition? Or can someone tell me how to do this?

If there is no spark, while the wires from the magneto do not short to ground and the spark plug is known to be in good condition, then the magneto needs to be replaced.

We bought a Makita DCS34 chainsaw. There were some questions. Does it make sense to install a 45 bar and a 3/8 chain with this engine? Is engine running-in required? What is the continuous running time of this saw's motor?

Running the engine in a chainsaw is not required. To put or not to put more tire on the saw is your own business. This saw will pull a 45 cm tire. Continuous engine running time is limited by the volume of the fuel tank.

The new Makita 35 chainsaw has worked a couple of times and will no longer start. There is a spark. After attempts to start, gasoline is poured out of the muffler (it does not drip, but pours out). There are no buttons for pumping gasoline. Sawdust dust was found under the air filter. Is the carburetor clogged with sawdust, or is it a more serious carburetor breakdown? I saw a new one, after all! Advise what to do?

Very often, during a cold start, the “setting” moment is missed. The candle is flooded and then at least pull off - it will not start. If you continue to try to start, then gasoline will condense in the crankcase. Drying the candle is not enough. She is immediately pelted with gasoline from the crankcase. It is corrected as follows: the candle is turned inside out, put aside to dry. Turn off the ignition (be sure!), Turn the saw upside down with the cylinder and pull the starter handle until the spray of gas from the spark plug hole stops flying. Collect everything back and start according to the cold start instructions.

Home page »Makita Chainsaw Carburetor Adjustment Video

Why and how is the chainsaw carburetor adjusted?

The gasoline engine works by burning a previously prepared mixture of air, oil and gasoline. Chainsaw carburetor adjustment is needed to prepare the mixture in the right proportion. It depends on the operation of the carburetor whether the engine will work with the declared power or will stall.

Regardless of the manufacturer, the principle and procedure for the carburetor of internal combustion engines is similar. For mixing air and fuel, the carburetor is a device that includes:

a constricted air tube;
fuel supply system;
regulating air damper.

Air at atmospheric pressure, passing through the air cleaner, is supplied to the constriction zone, where its flow rate is regulated by a flat damper overlapping the cross-section. After constriction, a vacuum appears in the pipe. As a result, the vacuum sucks in fuel from the fuel supply tube, the exit from which is regulated by a fuel needle connected to the float chamber by a jet. The device of a chainsaw carburetor, in principle, does not differ from other fuel mixers of internal combustion engines.

The mixing principle is to regulate the air damper, float level, depending on the degree of vacuum. We open the air - more fuel comes in, the engine picks up speed. The correct ratio of flammable consistency depends on the precise adjustment of the chainsaw carburetor. If there is a lot of air in the fuel, the power drops, the mixture is called lean. If there is a shortage of air, there is a large fuel consumption, incomplete combustion, carbon deposits on the cylinder and the release of unburned fuel. This says the mixture is oversaturated.

Chainsaw Ural, according to the annotation, asks for running-in with the use of an enriched fuel consistency. Therefore, the carburetor from the factory comes with a setting for the running-in period. When switching to the operating mode, the node is set up again.

Signs of good work of the chainsaw carburetor:

the engine runs smoothly, sounding like a four-stroke;
high-spirited set of revolutions;
the chain does not spin when idling.

Your brand new chainsaw is adjusted to the recommended mix. It will only be necessary to fine-tune it with three screws; it is not necessary to disassemble the carburetor. The purpose of the adjusting screws:

Spare parts for chainsaw Makita Repair chainsaw Makita dcs 4610, repair.

Chainsaw Makita/ Dolmar does not start Compression is present,carburetor But a fascinating case was found.

"L" regulates the fuel supply at low rpm;
"H" is needed to regulate the maximum fuel supply;
"T" idle speed regulator.

Because the saw carburetor is adjusted by ear while the engine is running, safety precautions must be observed. The saw should be positioned in a stable manner with the torches pointed in a non-hazardous direction.

Before starting the manipulations, it is worth noting the initial position of the screws with paint or a felt-tip pen. The clear values of the chainsaw carburetor option for each model are in the instruction manual.

But more often, a carburetor tincture is required after eliminating a malfunction of the instrument. Video. Excerpts from adjusting the carburetor of the Makita dcs 4610 chainsaw. The reasons may be:

violation of the protective cap and imbalance of the screws;
wear of the engine piston, requiring a different consistency composition for operation;
unsatisfactory operation of the carburetor itself.

How do I adjust the carburetor on a certain model of chainsaw? Operations are performed one by one, guided by the annotation. Here is the method, the general sequence of actions.

There are two stages of the option:

basic, with the engine off;
narrow - on a warm engine, idling.

The basic setting is carried out only for the fuel screws at low and high speeds. Smoothly, slowly, you should completely close the flaps until it stops. Also slowly open both screws counterclockwise 1.5 turns.Adjusting the carburetor of the Makita chainsaw. Then start the engine and warm it up for 10 minutes.

How to set up a carburetor on a chainsaw with the engine on:

adjust the idle speed with the screw "T", turning counterclockwise until the engine runs at idle speed;
check the speed of the set of revolutions, with unhurried spinning turn the screw L an additional 1/8 turn;
set the highest rotation speed on the tachometer with screw H;
check the operation of the carburetor at idle at all.

But the adjustment may be preceded by the repair of the carburetor itself, when it cannot fulfill its function as a fuel mixer.

Adjustment do-it-yourself carburetor on a chainsaw

Adjustment chainsaw carburetor ensures efficient operation of the tool at full power with economical fuel consumption. Adjustment must be carried out with a clean fuel and air filter. For more carburetors adjustment carried out by 3 screws: for the largest and minimum revolutions and adjustments idle move.

The H and L screws adjust the ratio of the mixture of gasoline and air, which is determined by opening the throttle valve of the carburetor. When the screws are unscrewed, the mixture is enriched, and the revolutions accordingly fall, when the screws are tightened, the mixture is depleted - the revolutions increase.

Designation H refers to the maximum speed propeller that controls the main jet, L refers to the propeller minimum revolutions, jet control idle move... The S screw provides a precise adjustment revolutions idle move... Sometimes, to simplify tuning, the number of available carburetor adjusting screws is reduced.

Chainsaw carburetor tuning is divided into two stages - the basic (factory settings), carried out with the engine off, and the final, made with the engine running warm. The exact value of the angles of rotation should be taken from the operating instructions for the particular chainsaw. Failure to follow the manufacturer's instructions may result in engine damage.

Spare parts for chainsaw Makita Makita dcs 4610 chainsaw repair, repair.

Chainsaw Makita/ Dolmar does not start Compression is present,carburetor But an interesting case was discovered.

Basic adjustment carburetor.

The adjusting screws for maximum H and minimum L turns are slowly turned clockwise until they stop, then turned back 2 turns, other settings are also possible

Verification and idle speed adjustment.

Finding the highest turnover idle move, for this we slowly turn the screw L in different directions. After finding the position of the highest engine speed, turn the screw L 1/4 turn against clockwise... If the chain rotates at idle speed, screw T or (S) should be turned clockwiseuntil it stops.

Verification and adjustment maximum speed.

The maximum number of revolutions is changed by screw H. When screwing it in (clockwise rotation), the revolutions increase, while turning it in, it decreases. Chainsaw engines have the highest rotation speed of 11500 rpm. up to 15,000 rpm. A higher speed does not provide ignition, moreover, it becomes dangerous for the engine. The rpm limit can be determined by the ignition interruptions. If they step, screw H is slightly turned against clockwise.

If engine operation is not checked for acceleration and maximum rpm then adjustment the chainsaw cannot be considered complete.

When you smoothly press the throttle trigger, the engine should confidently and quickly gain speed from idle move to the maximum (from 2800 samples to 11500-15000 samples, depending on the unit). If revolutions are gained slowly, with a lag, screw L must be slowly unscrewed against clockwise, but not more than 1/8 of a turn.

After adjusting the acceleration and maximum speed, check the saw operation at idle speed again - the engine must run stably, the chain must not move. Chainsaw tuning should be repeated if this condition is not met but with the exception of the basic adjustment step.

The chainsaw is a worthy replacement for hand saws and axes. Today, this tool is available in almost every household - it is indispensable for setting up a personal plot, construction and repair work. Intensive use and improper care of the tool can lead to premature failure. However, the owner of the chainsaw does not have to go to the workshop right away - many of the faults that can happen to her during operation can be completely eliminated on their own.

Correct diagnosis is essential for a successful repair. Therefore, in order to determine why the chainsaw failed and, most importantly, how to make it work again, you first need to know the features of its design.

It should be noted that it does not differ in particular complexity, since it includes:

engine (two-stroke gasoline);
functional part (saw bar and chain);
systems that ensure the joint operation of these two units (ignition, filtration, lubrication, etc.), that is, the tool as a whole.

In order to simplify the diagnosis of malfunctions, it is customary to distinguish them into two main categories:

engine malfunctions;
malfunctions of other parts of the chainsaw.

Most often, failures occur in the engine systems, however, the rest of the tool, due to intensive use or improper care, can fail at any time. How to determine exactly where the breakdown occurred? Simple logic will help us with this.

If the problem is in the engine, it will:

do not start;
deafen;
work unstable;
overheat;
smoke;
develop insufficient power.

As for all other malfunctions, as a rule, they manifest themselves with a normally operating motor.

If your chainsaw won't start, the first thing to do is to check for a mixture of fuel in the tank. By the way, it must be prepared in the proportions indicated by the engine manufacturer, otherwise the instrument will simply not start.

After verifying that the fuel mixture is correct and available, the ignition system should be checked. To do this, you need to inspect the spark plug.

Her condition can say a lot:

indicates that the fuel mixture does not enter the carburetor, which means that the problem is not in the ignition;

fuel-splattered candle

is the result of an overabundance of the fuel mixture, which lies either in a violation of the engine starting algorithm, or in an incorrect carburetor adjustment;

this is a signal about the presence of low-quality oil in the engine lubrication system, incorrect carburetor settings, or an incorrectly prepared fuel mixture.

If the spark plug is splashed with fuel, wipe it thoroughly after removing it. The fuel supply system should also be cleaned. To do this, it overlaps, after which the starter is turned on. A carbonized candle must be carefully cleaned with an awl and emery.

When checking the spark plugs, you should pay attention to the distance between the electrodes (the normal gap is 0.5-0.65 mm), as well as the condition of the gasket and the presence of a spark. A damaged or worn gasket will have to be replaced, and the spark can be checked by putting on the ignition cable, connecting the cylinder and plug nut, and starting the starter.

If the discharge does not occur, the plug must be replaced. In the event that a spark does not appear with a new candle, then the problem is in the connection to the high-voltage wire or in it itself.

If the fuel mixture does not flow into the cylinder, but the spark plug is working properly, this may mean that:

Clogged fuel filter.

To clean this unit, remove the fuel hose and check the jet. If it is weak, the filter must be removed through the filler hole of the fuel tank and cleaned or replaced if completely worn out.

As a preventive measure, it is recommended to replace the fuel filter at least once every 3 months.

This is nothing more than a hole in the fuel tank cap, which is cleaned out with an awl.

The fuel mixture is not supplied or is supplied insufficiently.

There may be several reasons for this:

the air filter is clogged (in this case, it must be removed, rinsed with water, dried and replaced);
the carburetor settings are out of order (which means this unit needs to be re-adjusted);
the integrity of the carburetor membrane is broken (must be replaced);
the channels of the carburetor are clogged (it must be disassembled and all parts and assemblies must be cleaned).

If at low speeds the engine of the chainsaw works normally, but at high speeds it starts to stall and smoke, the problem may be hidden in the muffler.

To check the quality of its work, you should do:

dismantling (with the obligatory closing of the outlet);
disassembly (if the muffler is collapsible);
cleaning from carbon deposits using special detergents or dry method;
drying (using a hair dryer);
reassembly and assembly.

Dry cleaning without respiratory protection is not recommended. The carcinogens present in the soot will be released into the surrounding atmosphere in the form of dust, the inhalation of which is extremely hazardous to health.

To prevent clogging of the muffler during the operation of the chainsaw, you should carefully monitor the composition of the fuel mixture and the quality of its components.

If the chainsaw engine does not start or cannot develop normal power, it is likely that sufficient pressure does not build up in the engine cylinder for combustion of the fuel mixture. The reason for this may be the wear of the elements of the cylinder-piston group - the piston, rings, bearings, etc. In order to assess the condition of this unit, it should be visually inspected, having previously removed the muffler.

For a more complete diagnosis, a compression gauge is placed in the spark plug hole of the two-stroke engine of the chainsaw. It measures the compression in the engine. Based on the results of the check, one can judge the state of the CPG, however, the exact facts can only be obtained with a complete disassembly of the unit.

If the piston is chipped or scratched, it will obviously need to be replaced. The same applies to deformed or broken piston rings - for normal engine operation, they must be completely intact and free of carbon deposits.

A properly working carburetor guarantees maximum efficiency of the chainsaw, that is, it is possible to develop full power with the most economical consumption of the fuel mixture. The adjustment of this unit is usually carried out by the manufacturer, but its design provides for the possibility of adjustment already during operation.

The fact that such a setting will have to be performed by the owner of the chainsaw is evidenced by:

Strong vibrations or damage to the protective cover.
CPG wear.
Carburettor clogged.
Inability to start the engine or its spontaneous stops after starting.
Increase in fuel consumption and emissions while decreasing engine power.

Chainsaw carburetor adjustment is carried out in strict accordance with the manufacturer's instructions using three special screws, which are responsible for the maximum ("M") and minimum ("L") revolutions, as well as the idle speed of the engine ("T"). In order to exclude unwanted interference by an inexperienced user with the carburetor operation, some manufacturers install only one idle screw.

Carburetor adjustment is carried out in two stages:

Basic (carried out with the engine off).
Finishing (carried out with a running, pre-warmed engine).

For basic adjustment, screw in screws H and L as far as the stop and back out 1.5 turns. Final adjustments require the engine to warm up for 5-10 minutes at low revs.

The final calibration is performed by unscrewing the idle screw until the minimum engine speed is reached (in this case, its operation must be stable, and the chain must be stationary). If the engine stops at idle speed, the screw must be returned back, and if the saw chain is still in motion, continue turning counterclockwise.

Calibration check is performed by test:

Acceleration (with a smooth press on the accelerator, the engine should quickly pick up speed to the maximum indicator).
Maximum speed (if there is an ignition interruption, screw H should be slightly loosened).
Work at idle speed (the chain should not move, and the engine should pick up speed as quickly as possible).

If the owner of the chainsaw is not familiar with the carburetor device and does not have the tool necessary to calibrate it, contact a specialist. The carburetor is a very complex unit, so any wrong action can lead to irreversible consequences, for example, complete engine failure.

If the diagnostics showed that everything is in order with the engine and its systems, then the cause of the malfunction should be looked for in other units of the chainsaw. The most common problems are:

failure of the starter;
improper operation of the lubrication system;
incorrect operation of the chain brake;
saw chain wear, etc.

If the cause of the tool failure is not visible to the naked eye, as is the case with the engine, it is necessary to perform a thorough diagnosis of the faults and eliminate them in accordance with the manufacturer's recommendations and safety regulations.

Adjusting the carburetor with your own hands on a chainsaw Adjusting the carburetor of a chainsaw ensures efficient operation of the tool at full power with economical fuel consumption. Hyundai lawn mower carburetor adjustment. AdjustmentAdjustment chainsaw carburetor ensures efficient operation of the tool at full power with economical fuel consumption. Adjusting the speed of the stig mower. Adjustments must be made with a clean fuel and air filter. Carburetor adjustment Chinese brushcutters. Adjustment of the huter gas trimmer carburetor. For a larger number of carburetors, the adjustment is carried out with 3 screws: for high and low speed and idle speed adjustment.The H and L screws adjust the ratio of the consistency of gasoline and air, which is determined by opening the throttle valve of the carburetor. Carburetor device on a lawn mower. When the screws are unscrewed, the consistency is enriched, and the revolutions accordingly fall, when the screws are tightened, the mixture becomes leaner - the revolutions grow.Designation H refers to the high speed screw that controls the main jet, L refers to the low speed screw that controls the idle jet. Setting the carburetor benzotrimmer photon MK 4300. Adjusting the carburetor Japanese trimmer. The S screw is used to fine-tune the idle speed. Adjusting the carburetor benzotrimmer is a favorite. From time to time, to simplify the option, the number of available carburetor adjusting screws is reduced.Chainsaw carburetor tuning is divided into two steps - the basic (factory options), carried out with the engine off, and the final, made with the engine running warm. Adjusting the speed of the makita lawn mower. A clear value for the angles of rotation should be taken from the operating instructions for a particular chainsaw. Adjusting the carburetor of Euroscart petrol cutters. Failure to follow the manufacturer's instructions may result in damage to the motor.It would seem, why does a chainsaw need a summer resident who grows vegetables and fruits, or the owner of a country house who has a small garden and several flower beds? The question disappears when there is a desire to build a bathhouse, update a greenhouse, throw down an old business, or just make a bench for relaxation. Unfortunately, any mechanism periodically needs preventive maintenance and replacement of spare parts, and for this you need to be well versed in the device of the product, besides, repairing the chainsaw with your own hands will save time and money.All chainsaws are similar in structure, regardless of whether they are European (ECHO, Stihl, Husqvarna) or domestic (Kedr, Ural). The main elements are located inside the body - the fuel tank and the engine, and outside the starter, the handle, the saw part (tire) with the chain. A sharp jerk in the cable starts the engine, which starts the saw blade.To begin with, we suggest that you familiarize yourself with the video clips that show how the chainsaw works and how it works:From time to time, the saw malfunctions, which require disassembly to eliminate. What can happen to such a simple mechanism as a chainsaw? At least the following:

Stops getting started;

Starts up, but soon stops;

Ceases to function in the cut;

Loses its power;

Most of the malfunctions are associated either with interruptions in the operation of the engine (fuel supply system, exhaust system, ignition, cylinder-piston part), or with malfunctions of other systems and assemblies (clutch, chain brake, tire, lubrication system). Let's consider the most common breakdowns and techniques for their elimination.A serviceable chainsaw starts with one jerk and does not fail in the cutThe first thing to do if a chainsaw breaks down is to inspect the spark plug by disconnecting the wire and carefully unscrewing it with a special key.The components of the chainsaw ignition system: 1 - flywheel with magnets, 2 - ignition module, 3 - spark plug, 4 - high voltage wireUnscrew the spark plug to check its condition.Her appearance says a lot:

Dry. Most likely, the fuel mixture does not enter the cylinder. It's not about the ignition system, so the plug is screwed back in.

Strongly splashed with fuel. The reason for the excess fuel mixture lies either in the violation of the starting rules, or in the incorrect adjustment of the carburetor. The spark plug is carefully wiped, shut off the fuel supply and turn on the starter - to remove excess fuel and ventilate the combustion chamber. Then the candle is put in place and the mechanism is started again.

Covered with black carbon. This may indicate the use of low-quality oil, an incorrectly adjusted carburetor, or an incorrectly calculated gasoline to oil ratio. The candle should be washed, cleaned of carbon deposits with a sharp object (awl or needle), wipe the electrodes with a sandpaper and put in place.

When checking the candle, you need to pay attention to the gap between the electrodes: it is considered normal from 0.5 to 0.65 mm. A damaged or worn gasket must be replaced.A large amount of black carbon on the spark plug indicates a malfunction of the engine.To be sure, you should also check for a spark. To do this, put the ignition cable on the spark plug, connect the plug nut and the cylinder with pliers, start the starter and watch for the spark. If it is missing, the plug must be replaced. If the new spark plug also does not emit sparks, the problem is in the high-voltage wire or in the broken connection with the spark plug.Fuel may not enter the cylinder for the following reasons:

Dirty fuel filter. Remove the fuel hose and check how the fuel flows. If the jet is weak, the filter may need to be cleaned. It is taken out through the filler hole of the fuel tank and cleaned; in case of severe contamination, it is replaced with a new one. As a preventive measure, it is recommended to replace the fuel filter every three months.

Clogged breather (holes in the fuel tank cap).It is also checked by disconnecting the hose, in case of blockage, clean it with a needle.

Lack or insufficient amount of fuel. There may be several reasons for the malfunction. The first reason is a clogged air filter. Air ceases to flow into the carburetor in the required amount, in this regard, due to a too rich fuel mixture, engine operation is disrupted. The contaminated filter is carefully removed, cleaned and washed in water, then dried and reinstalled.

Another reason is improper adjustment of the carburetor. The adjustment is made with three screws.Timely replacement of the fuel filter ensures full fuel supplyThe fuel hose and choke actuator must fit snugly on the fittingsThe throttle lever cable must be in placeDuring work, you must use the instructions, otherwise you can only make it worse.And the last reason is a violation of the integrity of the membrane or clogging of the carburetor channels.To repair the carburetor yourself, you need to get acquainted with all its parts.All parts must be clean, dry and in good condition.If the engine works fine at low speeds, and at high speeds it starts to stall, the reason may lie in the muffler spark arrester, clogged with combustion products.

remove the muffler;

disassemble (there are also non-separable models);

remove carbon deposits using detergents;

dry with a hairdryer;

install in place.

Dry cleaning is unacceptable, as the soot contains carcinogens, the inhalation of which is hazardous to health. After removing the muffler, cover the outlet with a clean cloth.Interruptions in the operation of the chainsaw signal a possible clogging of the mufflerTo avoid clogging of the muffler, it is necessary to monitor the composition of the fuel mixture. The amount of oil should not exceed the rates recommended by the manufacturer. Poor oil quality also negatively affects engine performance.Often the engine will not start or run at full capacity due to low cylinder pressure. It can be caused by piston or cylinder wear, piston ring sinking, bearing wear. You can partially examine the state of the cylinder-piston group (CPG) by removing the muffler and looking into the opened hole.A compressor placed in the spark plug hole will help to measure the compression in the engine - according to the measurement results, you can also talk about the state of the CPG. Accurate data is obtained only after complete disassembly of the mechanism. If the piston is chipped or scratched, it must be replaced. The piston ring must be clean, free of carbon deposits, and be exactly in place.Piston and crank mechanism wear is considered a serious problem.According to the results of measuring the compression, one can judge the condition of the parts of the CPGLet's consider three main faults:

Oil leakage. Check that the pipes are tightly connected to the pump unions and that they are not cracked. Problem tubes are sealed with sealant or replaced.

Insufficient oil supply. Most likely, the lubrication passages are clogged.

Cracks in the oil pump housing. Part needs to be replaced.

Here's how to diagnose the lubrication system:The chain brake often does not work due to clogging of grease or sawdust in the brake band and the space under the cover. All parts should be cleaned from blockages. Perhaps the tape is simply worn out, then it needs to be replaced.The chain brake is restored by mechanical cleaning

Video (click to play).

Some parts of a chainsaw will wear out faster than others. These include the drive sprocket, bar, chain, anti-vibration elements. For quick replacement, it is best to always have spare parts on hand. Sharpening the chain should not be neglected.