DIY Chainsaw Partner 350 Adjustment

Table of Contents:

Cleaning the muffler

In some cases, the engine starts to stall and smoke at high revs. At the same time, at low speeds, it works normally. Most likely the reason is that the muffler is clogged with combustion products.

To eliminate this malfunction, the muffler is removed, disassembled and cleaned of carbon deposits with the help of detergents. After that, it must be dried with a hairdryer and installed in place.

Cover the saw outlet with a clean cloth while the muffler is removed.

Checking the ignition system

First of all, if any chainsaw malfunctions, you should inspect the spark plug. To do this, the wire is first disconnected, and then the candle itself is turned out using a special key. By its appearance, you can understand the cause of the problem:

  • A carbon-coated chainsaw candle indicates the use of low-quality oil, an incorrect ratio of oil and gasoline when preparing fuel, or a poorly adjusted carburetor. In this case, the candle must be cleaned of carbon deposits with a needle or an awl, and the electrodes must be washed and wiped with a sandpaper.
  • If the spark plug is heavily splashed with fuel, then most likely the carburetor is incorrectly adjusted or the rules for starting the tool have been violated. To remove excess fuel, it is necessary to shut off the fuel supply, turn on the starter and check the combustion chamber. After that, the candle is wiped, twisted into place, and the mechanism starts again.
  • A completely dry candle indicates that the fuel mixture does not enter the cylinder of the chainsaw. In this case, the cause of the breakdown is not in the ignition system, so the plug is put back.

To check the spark plug is working, you need to put on the ignition cable, connect the cylinder and the plug nut with pliers, and start the starter. If there is no spark, then the spark plug must be replaced.

Chainsaw fuel system repair

There may be several reasons why the fuel-air mixture does not enter the cylinder:

  • clogged fuel filter;
  • clogged hole in the fuel tank cap (breather);
  • insufficient fuel;
  • improperly adjusted carburetor;
  • clogging of channels or violation of the integrity of the carburetor membrane.

To diagnose a clogged filter or breather, you just need to disconnect the hose and see how the fuel flows. The trickle from the tank should pour out with good pressure. If it is intermittent and weak, then the filter must be pulled out through the neck of the tank and washed or replaced, and the breather must be cleaned with a needle.

The chainsaw carburetor is a rather complex device, equipped with many small parts. Therefore, it is better to entrust its disassembly and repair to specialists.

If the carburetor filter is simply clogged, then it can be carefully removed, shaken out, washed with detergents and put back.

The carburetor can only be adjusted with your own hands. This is done with three screws strictly according to the instructions.

The main malfunctions of the Partner 350 chainsaw

Most often, the cause of a tool breakdown is associated with interruptions in the operation of the engine or other components and systems. Disassembly is required to eliminate any faults. To do everything right, you need to know the design features of the chainsaw and the main reasons for its breakdown.

Chainsaw Partner 350: DIY repair, video

Today, almost every household has a chainsaw, which is a worthy replacement for axes and hand saws. The Partner 350 hand-held chainsaw will be the ideal solution for people living in a private house or engaged in construction. This tool of the Swedish manufacturer is very convenient and compact, therefore it is suitable for any work on a personal plot.

However, improper maintenance and intensive use of the unit can lead to its breakdown. In this case, it is not necessary to immediately contact a service workshop. Many faults can be corrected by hand. To do this, it is enough to study the saw device and video instructions for its repair.

Design features of the Partner 350 chainsaw

The reliable and easy-to-use saw of this model has a gasoline engine with a power of 1300 watts. It features easy starting thanks to the built-in professional fuel pump and electronic ignition system.

The chainsaw is equipped with a safety system that automatically activates the double inertial chain brake. The chain is also lubricated automatically. Changing the chain tension of this unit is very easy with just two keys.

The chainsaw is equipped with a fuel primer, so it is easy to start at any time of the year. The drum of the starter of the tool is equipped with a special impeller, with which it is cleaned of dirt.

A filter with CCS system is able to trap all residual particles. In addition, this system allows you to use the air filter for a long time, while saving fuel consumption.

Manufacturers of the Partner 350 chainsaw equipped the cylinder walls of the piston group with chrome plating, which significantly increases the service life of the tool.

Repair of the cylinder-piston group

In this group, problems are rare. If an element breaks down, it is most often replaced with a new one.

The main malfunctions of the cylinder-piston group:

  • Engine power can be lost due to low (about 5 atm) cylinder pressure. To measure it, you need a special pressure gauge, which is called a pressure gauge. Normal working pressure of the cylinder is 8-9 atmospheres.
  • If hot gases are emitted into the crankcase, the piston rings are likely to sink.
  • Loss of pressure and the release of gases through the cracks may indicate the destruction of the cylinder head gaskets. They need to be replaced.

It is possible to fully assess the condition of all elements of this group only visually, through the hole from the removed muffler. If possible, then remove the cylinder head or the entire cylinder.

If the cause of the chainsaw breakdown is insignificant, then it doesn’t matter whether the tool was made by Russian or Chinese manufacturers. Disassembly and repair of the unit can be done quite easily with your own hands, having previously studied its design and video instructions for troubleshooting.

Chainsaw Partner 350. ignition adjustment

You need to think about setting the ignition of Partner garden tools when its engine has stopped starting, or in the case when the rated power of the engine has dropped significantly. Before adjusting the ignition, you will need to thoroughly clean the spark plug, as well as wipe the coil itself from dust.

The further procedure is as follows:

  • First you need to remove the left cover of the protective plastic case;
  • The flywheel and ignition coil are located under the cover. They should be located at a certain distance from each other. A template or a regular paper business card will help to establish the gap between them;
  • To complete the adjustment, you will need to remove the 2 screws located next to the flywheel. During their rotation, the element will move away from the coil;
  • Further, on the side of the coil, you will need to fix the template immovably and start turning the screws in the opposite direction;
  • As soon as the handwheel makes contact with the template, you need to complete the adjustment.

After adjusting the ignition, you need to reinstall the housing cover and check the operation of the Partner 350 chainsaw. If the unit was adjusted correctly, the chainsaw engine will start the first time.

Chainsaws Partner (Partner) 350

Popular among gardeners, the Partner 350 chainsaw successfully combines endurance, the ability to cope with the most difficult household tasks and economy. This model tolerates operation in difficult weather conditions, which makes it possible to use it both in summer and in winter, without the risk of unexpected breakdown of the main working units

chainsaw, partner, adjustment

Chainsaw oil Partner 350. how to choose?

To extend the life of the engine and other working mechanisms of garden tools, it is necessary to use high-quality engine oil for preparing the fuel mixture. When burned in a cylinder, it should form as little ash as possible, which settles on the walls of the muffler and on the spark plug.

The engine oil used for refueling must quickly dissolve in gasoline and be thoroughly cleaned of harmful impurities, which, over time, settle in the narrow channels of the Partner saw carburetor.

See also  How to dilute gasoline for your Husqvarna chainsaw

In addition, Partner 350 chainsaw oil must have high lubricating and anti-corrosion properties, as well as resist wear well.

chainsaw, partner, adjustment

It is best to use Stihl and Husqvarna brand 2-stroke oils for fuel mixing. They lubricate the working units of Partner garden tools well and, when burned, do not emit a large amount of ash.

Chainsaw Partner 350 starts up and stalls

There may be several reasons for this malfunction. Most often, the engine of the tool starts up and immediately stalls due to a clogged factory breather, as a result of which fuel does not enter the engine cylinder in sufficient quantity for operation. To fix the damage, you will need to remove and clean the breather. If it is damaged, then it will need to be replaced.

Another reason is the missing contact of the plug with the electrical wiring cap. This can be due to mechanical shock or the formation of carbon deposits from engine oil on the plug. To repair the Partner 350 chainsaw, the spark plug will need to be removed and cleaned. In some cases, a complete candle replacement can help.

The third reason for the malfunction is a strong blockage of the standard chain saw muffler. Over time, carbon deposits form on its walls, which prevents exhaust from the engine. As a result, gases build up inside the motor and interfere with proper operation. To fix the damage, it is necessary to remove the muffler and clean it with compressed air. You will also need to disassemble the motor and blow out its cylinder.

Partner 350 chainsaw will not start. how to troubleshoot?

When this breakdown is found, the first thing to inspect is the condition of the air filter. If a large amount of dust has accumulated on it, then the filter will need to be washed using clean gasoline.

Another common cause of a malfunction is problems with the ignition system. To repair the chain saw, you need to remove its left protective cover and set the correct clearance between the flywheel and the ignition coil.

In some cases, replacing the fuel mixture will help solve the problem. To do this, the used fuel will need to be drained and a new mixture of pure gasoline and engine oil poured into the tank.

Adjusting the carburetor of the Partner 350 chainsaw with your own hands

Before you start tuning the standard Partner carburetor, you need to thoroughly clean it from dust, dirt and carbon deposits that have accumulated on the walls. In addition to the carburetor, you will need to rinse and dry the fuel and air filters. Otherwise, the operator will not be able to accurately set the required engine speed.

In the upper left part of the protective plastic body of the Partner saw there are holes, inside which the manufacturer provides bolts for adjusting the carburetor. Having found them, you can proceed with the basic configuration of the node. To do this, the left and right screws, which are responsible for the number and quality of turns, respectively, must be set to the fully tightened position. Immediately after this, they must be loosened by 1/5 of a turn. The third adjusting bolt, marked T, must be left in the position in which it is installed.

The final adjustment of the carburetor of the Partner 350 chainsaw is performed in the following order:

  • First, you need to start the saw and let its motor run to fully warm up;
  • After 5 minutes, you can start adjusting. First, the left bolt must be turned in the direction of the clock hand until the engine reaches maximum speed. Then the left bolt must be turned 1.4 turns in the opposite direction. After completing these steps, the engine of the Partner chainsaw should work confidently at idle;
  • If, after manipulating the left adjusting screw, the chain on the bar begins to rotate, then it must be stopped by alternately turning the bolt T;
  • Then you need to move on to setting the quality of the fuel mixture. To do this, the right adjusting screw will need to be turned in the same direction as the clock hand. As soon as the motor reaches the maximum permissible speed, the screw must be unscrewed 1/4 turn in the opposite direction.

When setting the maximum engine speed for the Partner 350, it is better to use a tachometer connected to the motor. As soon as the device shows the same rpm as indicated by the proprietary operating instructions for the model, it means that turning the screw must be stopped.

What to do if the chain on the Partner 350 chainsaw is not lubricated?

If the chain for the Partner 350 chainsaw is no longer lubricated with oil, this can lead to overheating of the bar and a rupture of the saw headset. Ignoring this problem can also lead to increased engine load, which can lead to engine failure.

The first thing to inspect if there is no lubricant on the chain is the oil pump. Over time, the teeth on its drive wear off, which can also happen due to clogging of the pump. The element is usually impossible to restore, so it is best to replace it.

Often, lubricant does not get on the chain of the Partner 350 chainsaw due to clogged oil pipes. In this case, the hoses will need to be replaced by treating their joints with the fittings with a sealant.

Chainsaw device Partner 350

The Partner model in the 350th configuration stands out for its excellent selection of components and high build quality. The basis of the gardening tool is a 2-stroke 1-cylinder internal combustion engine running on a mixture of AI-92 gasoline and engine oil. The piston group of the motor is forged and covered with a chrome alloy to extend the working life of the internal combustion engine. The factory engine includes a proprietary CCS filter, which is distinguished by the ability to capture the smallest foreign particles, preventing them from entering the fuel.

The Partner 350 chainsaw differs from analogues in a simplified start, which was achieved thanks to a modified self-cleaning drum starter, a professional fuel pump and durable electronic ignition. For preliminary pumping of the used fuel into the cylinder, the model is equipped with a primer.

For the safety of the operator during the operation of a working chainsaw, Partner has equipped garden tools with a high-quality inertial brake that instantly responds when the saw headset hits a nail or any other foreign object.

Partner saw blades. metal bar and chain. They are tensioned using two keys, without the need to remove the protective cover of the plastic case.

One of the main advantages of the Partner 350 chainsaw is the convenient location of the controls required for operation. The throttle lever, combination switch, and factory starter cable are located at the rear of the tool, making it much easier to operate in tight spaces.

When carburetor adjustment is necessary?

Initially, from the moment the tool was sold, all carburettors were adjusted and tuned at the factory. However, in the process of operation, the settings gradually get lost, and the operating mode changes in accordance with the operating conditions. Signs of a carburetor malfunction may include:

  • too high gasoline consumption, thick smoke comes from the exhaust pipe;
  • engine power is clearly not enough to perform normal tasks;
  • engine speed “float”;
  • after starting, the motor stalls either immediately or after a few seconds;
  • the engine cannot be started at all;
  • the chainsaw “shoots”, there are sharp claps in the engine of the tool.

Note! The reason for poor engine performance may be the worn out piston group, then adjusting the carburetor of the chainsaw does not give a full solution to the problem. Also, no setting will give the expected effect if the node is not cleaned of small debris particles in parallel. The most problematic elements are jets and filters, both gasoline and air.

It should be noted that during the running-in of a new engine, the carburetor is adjusted to a reduced fuel supply in order to limit the engine power. After the end of the run-in, the fuel supply increases to the nominal value. These adjustments are made using the adjusting screws on the carburetor body (usually two or three).

Design and working principle

A carburetor is a device in which fuel (gasoline) and air are mixed in predetermined proportions, followed by feeding the prepared mixture into the engine cylinder. Almost all models of chainsaws are equipped with carburetors of the same type, so the device and principle of operation are the same.

The main structural elements of the carburetor are:

Chainsaw Repair. Replacing the Clutch Drum (Poulan Part # 530057905)

  • body, which is cast from aluminum to reduce weight. Chainsaws constantly have to be moved from place to place, during operation they are held by hands, therefore, reducing the weight of the tool is the primary task of manufacturers;
  • diffuser with an air damper, which are located at the inlet;
  • nozzles, which are valves for metering fuel supply;
  • a sprayer that injects gasoline into the chamber (in the diagrams it is designated as the main jet);
  • fuel (float) chamber.

Figure 1. Diagram of a chainsaw carburetor

The principle of operation of the carburetor can be described as a cycle consisting of the following steps:

  • When starting the engine, the choke opens.
  • The piston stroke creates a vacuum in the air channel, as a result of which air enters the diffuser, the amount of which is regulated by the position of the air damper.
  • Gasoline flows from the gas tank to the float (fuel) chamber. The rate of its admission is regulated by jets.
  • In the diffuser, gasoline and air are mixed, resulting in the formation of a fuel-air mixture, which then enters the engine cylinder. The more the mixture enters the combustion chamber of the cylinder, the higher the power and speed on the engine shaft will be.
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Important! It should not be assumed that the operation of the carburetor is cyclical, as it might seem from the description. All processes take place constantly and continuously.

Adjustment tools

To tune the carburetor, you will need a Phillips or slotted screwdriver of different lengths or thicknesses; the size depends on the design of this unit and the features of the engine assembly. It should be noted that some manufacturers make carburetors designed to use special tools.

In particular, special types of screwdrivers may be required to tune Husqvarna carburettors and other imported tools. It is advisable to clarify this question even when buying a chainsaw, so that you can purchase the necessary additional equipment in advance.

In addition, you will need refined gasoline or acetone to flush and clean the device. They are used to clean the outer surfaces of the carburetor. All internal channels are flushed with kerosene, diesel fuel or white spirit. Before flushing, the carburetor is disassembled, all rubber or plastic parts that may suffer from contact with aggressive chemical compounds are removed.

Open-end or spanner wrenches are used to disassemble the carburetor. Internal channels are flushed in specially designated trays, sometimes plastic syringes are used for this.

How to properly adjust the carburetor with your own hands?

After rinsing and completely cleaning the carburetor, assemble it and start adjusting. First of all, you should understand the purpose of the adjusting screws. The instruction will help with this, but some general points should be considered right away. The most common designations for screws are:

  • H. adjusts the state of the main jet, i.e. adjusts the maximum speed of rotation of the motor shaft;
  • L. adjusts the idle jets (responsible for the minimum shaft rotation speed);
  • T. regulates the idling of the motor. It can also be designated by the letters LA or S, on some models of carburetors it is not at all.

Turning screws H and L clockwise depletes the air-fuel mixture, and counterclockwise enriches it (the amount of gasoline increases). When the screw T rotates, the idling speed of the shaft changes. it increases clockwise, and decreases in the opposite direction.

Figure 2. Carburetor adjustment mechanisms

Before proceeding with direct actions, you should find and carefully study the information on the position of the adjusting screws (the magnitude of the angles of rotation when adjusting). This information is available in the instructions for the chainsaw. Then you need to prepare the workplace. lay the saw on a flat horizontal plane, directing the chain in the opposite direction from you. Detach all covers, remove foam rubber and air filter. On this, the preparatory operations are considered completed, you can proceed to the main part of the work.

Carburetor adjustment procedure:

  • Smoothly tighten screws H and L clockwise until they stop. Be careful not to break the screws. this will cause a complete loss of the carburetor.
  • Unscrew both screws one and a half turn.
  • Run the engine for 10 minutes and warm it up. This is a necessary moment, since it will not be possible to correctly adjust the carburetor on a cold engine.
  • Turning the screws H and L, alternately adjust the rotation of the shaft at maximum and minimum speed.
  • By adjusting the position of the screw T (or it may have another designation), the idle speed of the chainsaw is adjusted. It is necessary to achieve smooth and stable engine operation. It is important to monitor whether the chain is idling or not. If it moves, turn the screw a little more counterclockwise.

Important! It is better not to adjust the screw H for an inexperienced person. If it is not set correctly, a lean air-fuel mixture will be supplied to the combustion chamber of the cylinder at maximum speed. This will lead to accelerated wear of the piston group.

You can check the operation of the engine visually and by ear. A mixture that is too rich will cause thick smoke from the exhaust. When the lean mixture is being fed, a whistling sound is heard while the saw is running. Excessive economy mode is harmful. if the L screw is set to “lean” fuel, there will be problems with starting the engine. If the H screw is set to lean, the saw will noticeably lose power. You can determine the correct setting by the following criteria:

  • at idle speed, the engine does not stall, and the chain is stationary;
  • there is no excessive smoke from the exhaust pipe while the engine is running;
  • the engine demonstrates good throttle response (quickly picks up speed when you press the accelerator).

A detailed description of the setting is available in the instructions that come with the instrument in the delivery set. It should be carefully studied, as there may be some features or specific requirements established by the manufacturer and related only to this saw model. If all requirements are met exactly, the performance of the chainsaw will be restored to its original state.

How to properly adjust the carburetor on a chainsaw with your own hands?

A chainsaw is a useful, and sometimes just a necessary tool for the owner of a private house. It has a high degree of autonomy, can be used in the field, where there is no possibility of connecting to the power supply network. For some craftsmen, the chainsaw is one of the main devices that perform large amounts of work almost daily. Such loads knock down the factory settings that were set for all important engine components.

The mode of operation most often changes with the carburetor, which has to be adjusted again. Not having an idea of ​​the design and principle of operation of this element, it is impossible to properly adjust it. The question concerns many users who closely operate chainsaws, so it will be useful to consider it more carefully.

  • Design and working principle
  • When carburetor adjustment is necessary?
  • Adjustment tools
  • How to properly adjust the carburetor with your own hands?
  • How to set up a China-made saw?

How to set up a China-made saw?

The design of the carburetor on Chinese chainsaws is no different in principle. The order and principle of adjustment also do not differ and are performed in the same order. The only difficulty that may arise during the execution of work is determining the purpose of the adjusting screws. Typically the T screw is at the top and the H and L are at the bottom of the carburetor body. One additional screw may be present.

Figure 3. Location of adjusting mechanisms

Usually, their purpose is determined empirically, slightly changing the position and monitoring the result. After the purpose of the elements is clearly defined, further customization is not difficult and is performed in the usual manner.

Chainsaw carburetor tuning is an important and necessary procedure that must be periodically performed to restore the normal operation of the tool. This process does not create fundamental complexity, but it requires the user to be careful, attentive and comply with safety rules. The chain of a chainsaw is usually not removed, since you will need to observe its position. Therefore, it is important to constantly remember about the possibility of launching it and exercise the necessary caution.

The adjustment should be done smoothly, with small changes in the position of the screws, so as not to cause too sharp changes in the mode of rotation of the shaft. The result depends on the care and thoroughness of the user, and a properly tuned carburetor will extend the life of the tool.


According to its data, Partner 350 belongs to the type of household (amateur) and fully satisfies the needs of any consumer. For a general acquaintance with the chainsaw, just look at its main characteristics.

Partner 350 specifications

For those familiar with chainsaws, one glance is enough to determine the nature of the 350 Partner. A sufficiently powerful engine and a decent length of the tire indicate that it will be an indispensable assistant on the farm, but it is hardly suitable for professional felling.

Open circuit

This is mainly due to overheating during operation. Overheating is caused by a lack of lubricant supply or clogging of the oil passages with dirt. First of all, all oil channels are cleaned, the inside of the chainsaw is cleaned of debris (sawdust) in the area of ​​the drive sprocket and the tire groove. Only then can a new chain be installed. If a problem is found in the operation of the oil pump, the saw must be repaired in a specialized workshop.

The best chainsaw for a summer resident. Partner 350

The Partner 350 chainsaw is a relative of the famous Husqvarna brand, as Partner is a subsidiary of Husqvarna. Lightweight and convenient, reliable and simple, Partner 350 has found wide application in dachas and in private households. Pruning branches, branches, felling trees. this is not a complete list of works that can be done with a saw easily and naturally. A quick overview will help you get to know this in more detail.

Chainsaw Partner 350

  • Specifications
  • Device
  • Preparing the saw for use
  • Pros and cons of the Partner 350 chainsaw
  • Basic malfunctions and their elimination
  • Engine does not start
  • The engine does not develop power (stalls under load)
  • Broken starter cord
  • Open circuit
  • User’s manual
  • Reviews

The engine does not develop power (stalls under load)

One more reason is added to the previously listed reasons. it is required to adjust the carburetor or clean the muffler. The adjustment is carried out with the adjusting screws. Detailed information on this issue can be found on the pages of the site. The video shows the process of detecting and repairing a chainsaw failure.

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User’s manual

The manual contains recommendations, following which the owner of the Partner 350 chainsaw will not encounter problems when handling it. The safety measures and rules for using the product during operation are described in detail. The issues of repair, maintenance and care of the Partner 350 chainsaw are highlighted.

The types of chainsaw repairs allowed to do it yourself are determined by the instruction manual. All other faults are rectified in a specialized workshop.

Partner 350 manual

The operating instructions should always be at hand, especially if this is your first chainsaw and you just bought it. Be sure to read it first, and use it when questions arise while handling the instrument. You can download and print the instruction manual for the Partner 350 chainsaw using the link below.

Major malfunctions and their elimination

The main malfunctions that you can correct yourself and how to fix them are detailed in the “Operating Instructions”.


The general arrangement is traditional. Differs in simplicity, which means high reliability of the unit.

Chainsaw device Partner 350

The diagram of the general device of the Partner 350 chainsaw clearly confirms this.

Starting the engine is simple and reliable. This was made possible by the presence of electronic ignition. A primer (fuel booster pump) plays an important role during start-up.

The air filter is equipped with a double air purification system. As a result of equipping the starter drum with an impeller, large particles of debris do not reach the filter at all. Thanks to this, its service life is increased, and the degree of air purification is increased. In general, this has a beneficial effect on engine performance.

Safe handling of a working saw is achieved by the presence of a chain brake operating in two modes. manual and automatic.

The oil pump is only switched on when cutting. This means that the chain lubrication system works automatically. It should be borne in mind that different types of oils are used to lubricate the chain and prepare the working mixture. To find out what oil is used for the Partner 350 chainsaw video will help

Saw chains. Oregon 91P052E 3/8 ″ 1.3 mm 52 links chain is installed on Partner 350 saw. Replacement by analogs is acceptable: Stihl 39970000052c and others. For example, Husqvarna 5776151-22. Make sure that the number of links does not exceed 52 with a chain pitch of 3/8 ″ and a groove width of 1.3 mm. Less (46. 50) is possible, more is not desirable.

The anti-vibration system on the Partner 350 works somewhat harshly. Considering that this saw is not intended for professional use, the system as a whole can be considered satisfactory. By the way, on subsequent models in this regard, significant improvements have been made.

Recommended assemblies, parts, mechanisms and fuels and lubricants cannot be replaced by analogs.

chainsaw carburetor adjustment. when a procedure is required?

There are also a number of mechanical reasons that lead to the need to adjust the carburetor. These include:

  • Severe vibration. this will damage the protective cap, resulting in a loss of fixation of all three adjusting screws;
  • Wear of the piston part of the engine. in such a situation, adjusting the carburetor will only prolong the operation of the tool for a while. To completely eliminate the malfunction, you will have to completely replace the piston group;
  • Blockages. they appear as a result of the use of low-quality gasoline, filter damage or scale. In such cases, it will be necessary to dismantle, disassemble and clean the carburetor.

In any of these cases, it is best not to overtighten with the assembly adjustment or flushing procedure. Otherwise, this will lead to breakdown of other, no less important elements of the chainsaw.

How to check if the carburetor is set correctly?

To do this, you need to speed up the work of the chainsaw. Run the engine at maximum speed to objectively assess its performance. When you press the accelerator, the rotation speed should reach approximately 15 thousand revolutions per minute. This indicator indicates that the carburetor tuning was successful.

If you cannot achieve such an indicator at high revs, and the acceleration is slow, you need to re-adjust the carburetor, working only with the screw marked L. Rotate it counterclockwise. In this case, you need to rotate the screw slowly so that the rotation does not exceed 1/8 of the full rotation.

If the opposite problem arises and the maximum rotation indicators need to be reduced to 15 thousand, you need to rotate the screw marked with the letter H. Rotate it gradually, slowly in the opposite direction of the clockwise movement.

Reducing the RPM to the optimal value will reduce the risk of engine operation for wear.

Makita chainsaw carburetor repair. Makita Chainsaw Carburetor Adjustment

Adjusting the carburetor of a Makita chainsaw affects the performance of the device, the quality of work. To properly configure the working unit of the equipment, it is important: to understand the principle of its operation, have the necessary tools, take good care of the fasteners, as well as closely spaced elements responsible for the functioning of the chainsaw.

Chainsaw carburetor repair. Chainsaw carburetor. device, adjustment and flushing with your own hands

The carburetor is an integral part of the chainsaw, the function of which is to mix the fuel mixture with air and then supply the finished fuel to the tool engine. Despite the high reliability of modern carburetors, they are often subject to various breakdowns, which entails a complete stop of the chainsaw engine. Let’s look at the design of this important unit and how to troubleshoot it yourself.

Goodluck chainsaw carburetor repair. How the carburetor works

Regardless of the manufacturer, the principle and procedure for the carburetor of internal combustion engines is similar. Carburetor adjustment for chainsaw carburetor adjustment and

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

Air at atmospheric pressure, passing through the air cleaner, is supplied to the narrowing zone, where its flow rate is regulated by a flat damper overlapping the 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 the 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. It says the mixture is oversaturated.

The Ural chainsaw, 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 configured 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.

How to clean a chainsaw carburetor?

Flushing the carburetor of the chainsaw is required in cases where low-quality fuel is used to refuel the tool, or the tool is used at extremely low temperatures. In the process of work, you need to try not to damage or lose the small details of the unit. Carburetor cleaning is performed in this order:

  • Unscrew the screws holding the carburetor body;
  • Open the lid, remove the small parts of the assembly and lay them on a towel;
  • Thoroughly treat the walls of the body and all existing parts with compressed air from a can;
  • If carbon deposits remain on the parts, wipe them with a cloth moistened with degreaser;
  • Dry the body and parts;
  • Assemble and install the carburetor on the chainsaw.

After cleaning the carburetor with your own hands, you will notice that the chainsaw motor will run much more stable and gain momentum much faster.

Algorithm of actions for setting

The carburetor of the chainsaw is adjusted in two stages:

  • basic stage (engine on);
  • stage two. perform when the engine is warm.

Important ! Some setup steps need to be adjusted depending on the Makita chainsaw model. In order to do everything right, read the instructions.

Standard algorithm of actions.

  • Turn the screws for adjusting high and low speed to the stop (turn clockwise).
  • At the moment of meeting resistance, make one and a half turn back.

Screw marked T, move clockwise. Release it only when the engine starts to run stably. In this case, keep in mind that the chain should not move at this stage.

What if the engine shuts off during idle tuning? In this case, it is important to quickly turn the screw until it stops (turn clockwise). If manipulation causes the chain to move, turn the adjusting screw slowly to its original position.