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A chainsaw is a complex unit whose operation is based on a two-stroke internal combustion engine. To operate an internal combustion engine, a carburetor is required. In this mechanism, fuel is mixed with air, and this mixture is supplied to the engine cylinder for combustion. The operation of the internal combustion engine largely depends on the carburetor, which needs periodic adjustment. You can adjust the carburetor of a chainsaw yourself, but to do this you will need to know the instructions described below.

Chainsaw carburetor design

A carburetor is a device in which fuel is mixed with air and this mixture is supplied to the cylinder for combustion. When burned, the crankshaft is activated, to which the drive sprocket is connected to drive the saw set - the chain. The absence or malfunction of the mechanism in question will lead to the instrument being inoperable, so it is important that the device is in good working order and adjusted.

The design of a chainsaw carburetor consists of the following components:

• Solid cast aluminum alloy body. The use of aluminum for the manufacture of this mechanism helps to lighten the weight of the tool
• Air supply diffuser located on the inlet side of the mechanism
• Jets - valves that serve to regulate the supply of the mixture
• Atomizer - a device from which the fuel mixture enters the combustion chamber of the cylinder
• Float chamber - a device for creating and maintaining a certain level of fuel

A detailed design diagram of the device in question is shown in the photo below.

Setting up a chainsaw carburetor is an important step that every sawyer has to deal with. A chainsaw needs adjustment not only after purchase, but also in the following cases:

• Before running in the tool. How to set up the mechanism for proper running-in of a chainsaw is described in detail.
• After finishing the running-in process
• After engine overhaul
• During the operation of the tool, when malfunctions occur during operation and starting the motor

At the heart of the mechanism there are 3 screws for adjustment (on some Chinese models there are 2 screws), which are a control panel for the user. It is with the help of these screws that the chainsaw carburetor is adjusted independently and quickly. You can adjust an important component of the tool even in field conditions without resorting to the help of specialists.

How does a chainsaw carburetor work - principle of operation

The operation of the unit in question, despite its complex design, simple and understandable even for beginners. The operating principle is based on the following steps:

1. As soon as the internal combustion engine starts, the air damper opens
2. In the area of ​​narrowing of the diffuser 16, the flow of incoming air is accelerated, which is mixed with the gasoline-oil mixture
3. The gasoline-oil mixture is supplied through jets numbered 15 and 12, and the air, before passing through damper 7, passes through a filter located in front of the inlet
4. Damper 8 is located behind the diffuser and serves to regulate the amount of mixture supplied to the combustion chamber
5. Screws 17 and 10 adjust the volume of gasoline that passes through the jets. On the carburetor control panel, these screws are labeled L and H
6. The needle valve 11 regulates the volume of the fuel mixture in the float chamber 14. To adjust the position of the needle valve, a membrane 13 is installed in the mechanism
7. Another membrane 4 is responsible for supplying fuel to the combustion chamber of the cylinder. The position of this membrane depends on the number of revolutions of the internal combustion engine
8. A fine filter is used to clean the gasoline-oil mixture

The simple principle of operation of the carburetor ensures uninterrupted operation of the internal combustion engine. The quality of the setting determines how the tool will behave at idle and during operation. The mechanism in question has a direct impact on the performance of the entire tool. The service life of the tool depends on the quality of the adjustment.

Adjusting the carburetor fuel-air mixture supply mechanism - when it is needed

The first adjustment of the chainsaw carburetor is performed immediately after purchasing a new tool. This is done for the purpose of running in the tool’s motor. To run in the internal combustion engine of a chainsaw, you need to limit the maximum speed, which is done using adjusting screws. As soon as the run-in is completed, which lasts 2-3 tanks of burned fuel, it is necessary to make adjustments again, but only this time in order to establish maximum number rpm

In addition to break-in, chainsaw carburetors are adjusted when:

1. Knocking down the settings set after running in
2. If the internal combustion engine is difficult to start
3. If the engine does not develop speed or when you press the gas, the chainsaw stalls
4. Wear of the piston group, but only in this case, adjusting the chainsaw carburetor is a temporary measure, since the internal combustion engine needs a major overhaul
5. If the engine does not idle
6. Unit vibrations
7. Presence of carbon deposits on the spark plug
8. Increased fuel consumption. This phenomenon can be detected by an excessive amount of smoke. If you unscrew the spark plug, it will be black with soot.

Many malfunctions during the operation of a gasoline unit arise precisely because of incorrect settings of the chainsaw carburetor or when they are knocked down. To restore the previous performance of the tool, you will need to adjust the mechanism. Many beginners entrust this process to specialists, for which the masters charge a lot of money. It's time to figure out the adjustment and do it yourself, since this process does not require disassembling the mechanism.

This is interesting! The carburetor needs not only tuning procedures, but also washing when dirt gets inside. Washing involves disassembling the mechanism and cleaning each part in gasoline or kerosene. However, such a procedure is carried out no more often than once every 3-5 years, which depends on the production of the tool.

Adjusting the chainsaw carburetor instructions

Setting up a chainsaw carburetor begins with the preparation procedure. The basis of preparation includes the following actions:

• Check air and fuel filter for the presence of contamination, and if present, these elements need to be cleaned
• Make sure there is no damage to the membrane
• Needle valve malfunction
• Lack of air leaks, which can occur due to leaky seals, gaskets and seals

Once you are sure that the carburetor is working properly, you can adjust it yourself. It is possible to restore the mechanism to factory settings, but this is not always necessary. Instructions on how to adjust the carburetor on chainsaws Shtil, Husqvarna, Makita, Dolmar, Champion, Sadko and others are described below. First, let’s find out what each screw in the mechanism is intended for:

1. Screw H is the main jet, which is responsible for setting the maximum number of tool revolutions
2. Screw L - XX jet, which is needed to set low idle speed
3. Screw LA or S or T - increasing and decreasing the amount of mixture supplied to the cylinder

This is interesting! There are mechanisms on which there are two or even one adjusting screw, called LD for air supply (on Shtil 180 and 170 chainsaws). This is done in order to simplify the process of adjusting the chainsaw carburetor in a non-professional way.

Each type of tool from the brands Stihl, Husqvarna, Makita, Dolmar, Partner is accompanied by instructions, which contain a section that describes this process in detail. It won't hurt if, before setting up, you find the instructions and read them before turning the screws.

Preparation for setting up a chainsaw carburetor includes performing the following manipulations:

1. Installing a chainsaw with your own hands flat surface. It is also recommended to fix the tool so that it does not move when using a screwdriver on the screws
2. Point the tire away from you
3. Ensure a safe distance for others, since the chainsaw carburetor is adjusted with the engine running
4. There is no need to remove the carburetor from the unit to adjust it.

The process of setting up the chainsaw mechanism:

1. Warm up the engine by letting it run for 10 minutes.
2. Find the location of screw L and use a screwdriver to rotate it in one direction or the other. When rotating with the engine running, there will be an increase in speed (the engine will run louder) and a decrease (when rotating in the other direction)
3. We determine the optimal speed value, which should be 1.5-2 thousand revolutions. It will be difficult for a beginner to determine the speed by ear, so you can connect a tachometer. Details about connecting and using the tachometer are described
4. After selection optimal value revolutions, you need to turn screw L 1/8 or ¼ turn (indicated in the documentation for the unit) counterclockwise and press the accelerator button. If the engine responds instantly and evenly, that is, it picks up speed quickly, then you can continue the procedure. If failures are detected, then you should reduce the speed and repeat the test with the accelerator again
5. If after these manipulations the chain on the unit does not move, then you need to smoothly start rotating the screw T or S clockwise. Move the screw clockwise until the chain begins to move
6. As soon as the chain begins to move along the bar, you need to tighten the screw T or S back a quarter turn
7. The chain should stop at this point. If it continues to move, then screw S should be tightened. Ideally, the chain should not move at idle speed of the unit
8. An engine with a tuned carburetor should run evenly, and when you press the gas button, the speed should increase sharply. If the motor operates unevenly, you need to repeat the adjustment from screw L, turning it 1/8 of a turn counterclockwise. After this, the process of moving the screw S is repeated, at which point the adjustment of the chainsaw carburetor is completed

The regulation process is not yet complete, but the tool can already be tested in action. For beginners and inexperienced sawers, it is recommended to complete the setup process here. To more accurately adjust the chainsaw carburetor, tuning is needed maximum speed. Let's start setting the H screw for experienced sawers:

1. We determine the enrichment of the mixture by the exhaust. To do this, we develop the speed to the maximum and look at the nature of the exhaust. The presence of bluish smoke and strong vibration of the instrument indicate excessive enrichment of the mixture.
2. The tachometer (if connected) will show a large number of rpm - more than stated in the characteristics
3. To reduce the maximum speed, you need to move screw H a few turns counterclockwise
4. The maximum speed is checked again and the process is repeated again if necessary

This is interesting! A lean mixture can be determined by such signs as engine squealing, rapid heating, misfires and detonation. A lean mixture cannot be allowed, as it will lead to rapid failure of the cylinder-piston group.

You can make sure that the tool is configured correctly by the following signs:

1. The chain does not move at idle
2. The engine works like a four-stroke engine
3. When you press the throttle, the engine responds quickly and revs up.

To make the most accurate adjustment, you will need to use a wired or wireless tachometer.

On the Shtil 170 and 180 chainsaws, the process of adjusting the chainsaw carburetor looks somewhat simpler, since there is only one screw. Detailed description The process of regulating the carburetor on the Shtil MS180 chainsaw is presented in the video.

How to adjust the carburetor on a Chinese instrument

Let's figure out how to properly adjust the carburetor on Chinese chainsaws of different brands. The setup principle is similar to that described in the material above. First you need to inspect the tool and identify the presence of adjustment screws. Typically the T screw is on top and the L and H screws are below. Accessing these screws does not always require removing a protective cover or cover.

If a Chinese chainsaw has a different number of screws, then based on their number, you need to make the appropriate adjustments. The design and principle of operation of all chainsaws of different brands and manufacturers is approximately the same, so there will be no problems with adjustment.

It's always easy to do any new job, if there are instructions, so don’t be afraid to take on the setup. Even if you do something wrong, if you contact a specialist, he will definitely point out your mistakes. If you have difficulties adjusting the carburetor of your chainsaw, please describe them in the comments. Specialists, craftsmen and just amateurs, together with the founder of the portal, will help you understand this issue.

Country construction and repairs are not complete without the use of a chainsaw, as is garden care. A tool malfunction can stop all work, which is why it is so important to be able to disassemble it yourself, find problems and fix them. With sufficient experience and dexterity, it is even possible to adjust the carburetor of a chainsaw - a complex procedure, or rather, a jewel. We suggest you take it apart today on how to carry out the adjustment procedures.

The diagram shows the interaction of fuel and air flow

Operating principle: a jet of air in the diffuser atomizes fuel, creating a mixture entering the cylinder. The greater the amount of incoming fuel, the higher the engine speed. Carburetors various models work according to the same scheme.

When is adjustment generally necessary?

Specifically, adjusting the carburetor of a chainsaw is required in rare cases; more often problems arise related to the supply of fuel or wear of parts. But sometimes “symptoms” indicate that it is necessary to adjust the mechanism. Here are some signs:

• After the engine starts, it immediately stalls. Alternatively, it won't start at all. The reason lies in an excess of air and a shortage of fuel.
• Increased fuel consumption, and as a result - a large amount of exhaust gases. This occurs due to the reverse process - oversaturation of the mixture with fuel.

The reasons for the adjustment failure can also be mechanical:

• Due to strong vibration, the protective cap is damaged, as a result of which all three bolts lose their installed fixation.
• Due to wear on the piston part of the engine. In this case, adjusting the chainsaw carburetor will help only for a while; it is better to replace the worn part.
• Due to blockage that occurs due to low-quality fuel, scale or filter damage. The carburetor requires complete disassembly, cleaning and adjustment.

If the chainsaw suddenly stops working, you need to disassemble it to find out the reasons.

Step-by-step disassembly instructions

The carburetor design of models of different brands is almost the same, so let’s take the Partner chainsaw as an example. We carefully remove each element and place it in order to make it easier to assemble later.

Chainsaw carburetors different manufacturers if they differ, it’s not significant

The top cover is removed by unscrewing three bolts. Following it - foam rubber, component air filter.

The arrows indicate the bolts that must be unscrewed to remove the cover.

Then we remove the fuel hose, followed by the drive rod.

The upper arrow points to the fuel hose, the lower arrow to the drive rod

The arrow shows the cable tip that needs to be removed.

We pull off the gasoline hose from the fitting on the left.

We also carefully remove the gasoline hose, which the arrow points to.

We finally disconnect the carburetor, it is ready for adjustment. Its mechanism is quite complex, therefore, if further disassembly of the carburetor is required, you should remove the elements very carefully - they are small, so they can get lost.

The carburetor consists of many small parts, which should be laid out in order when disassembling

Features of setup and adjustment

To learn how to adjust the carburetor on a chainsaw, you should learn to distinguish between three screws (some models have only one).

Screws L and H are similar only in appearance, in fact they are different

Each screw has its own letter designation:

• “L” is used to adjust low speed;
• “H” is necessary to adjust the upper speed;
• “T” is needed to adjust the idle speed (models with one screw only have it).

The factory adjustment is optimal, and with the help of screws the engine operation is adjusted in special situations (work associated with different climatic conditions).

The diagram shows the outputs of the carburetor adjustment screws with the cover closed

The adjustment is made only with screws L and H. To increase the speed, turn them clockwise. To lower - counterclockwise. The sequence of use of screws is: L – H – T.

May be useful: how to repair a lawn mower with your own hands:

If you have doubts about the adjustment, it is better to contact a specialist, since incorrect adjustment can damage the engine.

When set correctly, the chainsaw runs smoothly and should not emit excessive smoke as the engine speed increases. When the carburetor adjustment was initially set incorrectly, you will immediately notice clouds of smoke that may be released during operation. An incorrectly adjusted carburetor can shorten the life of the chainsaw. Learn how to adjust your Chinese chainsaw to ensure it runs smoothly and efficiently.

Setting up a Chinese chainsaw

The procedure can be challenging. Some models are made after the example of expensive and high-quality models produced by famous brands. For this reason, you can see it on some Chinese analogues.

1. Idle Speed ​​Screw - This adjusts the engine speed at idle. If it is set too low, the saw will not work. If you install high, you may run into problems with the chain. Is it dangerous!
2. The low speed adjustment screw is a low speed setting. This is an adjustment that controls the air/fuel mixture at idle. In the first case not correct adjustment the saw will not start at idle speed. In the second case, engine failure will occur.
3. High speed adjustment screw. This is a regulation that controls the air-fuel mixture at high speeds. Incorrect setting leads to high speed of the chainsaw.

Regulation rules

Step 1. Check the fuel level in the fuel tank. This tank should be half full. If there is less fuel, it will make proper carburetor adjustment more difficult.

Step 2. Gain access to the carburetor. The location may vary depending on the model and manufacturer of your specific chainsaw. Typically, you will need an adjustable wrench and a hex wrench to remove the bolts from the chainsaw body. Remove the housing. Carburetor adjustment will be made using small screws near the engine.

Step 3. Start the chainsaw and wait three minutes. This allows the engine to warm up, which is necessary for proper carburetor adjustment.

Step 4. Turn the idle speed adjustment screw. You will hear the engine spinning or slowing down as you turn the propeller. Set the engine to idle so it runs at high speed. This will help prevent the engine from switching off unintentionally.

Step 5. Turn the screw adjustment to low speed. Turn it to one side until the engine runs as strong as possible. Turn the screw the other way. Note the two positions of the auger and turn the screw so that it is halfway between these two points. Pull the chain saw a little to check how it operates at low speed.

Step 6. Pull the trigger to bring the chainsaw to full throttle. If the engine runs normally, the full speed adjustment screw is installed correctly. If the engine is acting up, adjust the screw and pull the trigger again. Repeat until the chainsaw is running at full speed without interruption.

Step 7 Reattach the chainsaw body.

Carburetor settings Chinese chainsaw affects the operation of the tool. If you notice a difference in your chainsaw's performance, or if it's starting to run rough, a tune-up can help. While newer units are designed to prevent adjustment by anyone other than a licensed professional, older models feature easy-to-use screws for quick adjustments.

Adjusting the high-speed adjusting screw not only affects the output power, but also high speed rotation. If the screw is turned too far clockwise, the permissible operating frequency will be exceeded. This can lead to engine damage caused by lack of lubrication and overheating, among others. Adjustments to the high speed adjuster screw setting can only be made if an accurate tachometer is available to check the maximum engine speed of 13,000 rpm (with the bar and the chain properly tensioned).

When an engine is factory checked, the carburetor is set to produce a rich mixture to ensure that the cylinder bore and bearings receive additional lubrication during the period of operation. The high speed adjustment screw may be turned no more than 1/4 turn clockwise.

Do you own a Husqvarna 137 branded chainsaw? Then check out a similar article about.

Warning! The maximum permissible engine speed must not be exceeded! Please note that even minor changes to the adjusting screws have a noticeable effect on engine behavior.

Video: adjusting a Chinese chainsaw

The operation of a chainsaw engine is based on the combustion of a special mixture, which consists of fuel, oil and air. To prepare such a mixture and evenly transfer it to the combustion chamber, the engine has special device- carburetor.

The design of the saw includes a device that has factory settings. As the device is used, these settings become lost, and the carburetor must be adjusted again. To understand how to adjust a chainsaw carburetor, you need to know what parts the device consists of and how it works.

The design and principle of operation of the carburetor

Let's find out the structure of the chainsaw carburetor. This device consists of:

• housings;
• diffuser, which is located at the entrance to the device;
• jets;
• valves regulating the supply of the mixture;
• special sprayer;
• float chamber.

The device has 2 or 3 adjusting screws equipped with springs. At the end of the screws there are needle-cones.

The principle of operation of a chainsaw carburetor:

1. When the engine is turned on, the air damper opens.
2. The air moves forward and mixes with the fuel in the diffuser, where the passage narrows.
3. The air flows through the jets, then is cleaned by a filter and enters through a damper located at the diffuser inlet.
4. In this case, a special damper, which is located behind the diffuser, distributes the mixture, and it enters the combustion chamber.

The device is designed in such a way that the volume of fuel that passes through the jets is regulated by the chainsaw bolts. The volume of fuel in the chamber depends on the valve with a sharp cone. The operation of this valve is regulated by a membrane that controls the flow of mixture into the chamber. The operation of these components depends on the rotation of the internal combustion engine. The mixture is purified using a filter.

When adjustment is needed

Carburetor adjustment must be performed:

1. If the settings are lost due to loose screws or vibration, or when trying to adjust the device.
2. If the housing cover is broken.
3. To find out the reasons why the design does not work.
4. When the engine does not turn on or runs with effort, and then immediately dies out.
5. When a chainsaw shoots into the carburetor or “sneezes.”
6. The chainsaw vibrates a lot.
7. To check why there was excessive fuel consumption.
8. When thick exhaust appears.
9. If the device does not receive gasoline.
10. When the spark plugs are blackened or coated.
11. The saw cannot operate at high speeds and increase power.
12. Check the engine if it turns off when revving up.
13. The operation of the air purification units was disrupted.
14. Debris has entered the mixture distribution system.
15. The pistons have worn out.

Adjustments also need to be made when changing the brand of fuel and changes in humidity.

How to setup

Setting up a chainsaw carburetor is done as follows. Before adjusting the carburetor on a chainsaw, you should find out whether all filters are clean. The device is adjusted with three bolts:

• main jet H;
• idling L;
• idle adjustment S (some manufacturers call it LA or T).

1. The tool is installed on the workbench so that it is in a stable position.
2. The device circuit must be directed away from you.
3. There must be at least 2 m between the instrument and other objects in the room.

It is important to know how adjustments occur when the structure malfunctions. Turn on the carburetor and wait 10 minutes. The adjustment begins by finding the location of screw L at which the idle speed will be high. You need a wrench to adjust the bolts. Gradually turn the bolt, first in one direction, then in the other, until the correct position is reached. Then turn the screw 1/8-1/4 turn counterclockwise. Then the idle speed is corrected with screw S (or T, LA).

If after tightening the needle bolt L the chain does not move, then gradually turn the screw S clockwise until the chain begins to move. Then adjust S by 1/8-1/4 turn back. If the chain moves, turn screw S counterclockwise until it tightens. Next we twist S by 1/8-1/4 turn in the same direction.

The internal combustion engine must function smoothly. You should also check how it accelerates. If you press the accelerator, the speed should increase to maximum. This means that the engine spins well.

Finally, the operation of the device at idle is tested. When the adjustment is made correctly, the design should not work like this:

1. The chain is motionless.
2. The sound of an internal combustion engine is similar to that of a 4-stroke generator.
3. If you press the accelerator, a rapid spin will occur.

If these requirements are not met, then the idle speed must be adjusted. To do this, tighten screw S as described earlier. If this does not help, you should repeat the adjustment from the beginning.

That's what they do manual setting. Fine adjustment is carried out using a tachometer device. All actions are the same, only the screws are turned based on tachometer data. Thanks to this device, the carburetor can be adjusted faster.

Malfunctions and their elimination

Repairing a chainsaw carburetor with your own hands allows you to eliminate all problems that arise during the operation of the device.

If the internal combustion engine spins intermittently and accelerates for a long time, then you need to tighten L counterclockwise by 1/8 of a turn. Then adjust bolt S again. These adjustments should be made until the motor functions correctly and accelerates quickly.

Then check the setting of screw H. Accelerate the motor to maximum. Watch the exhaust and how the engine spins. If blue smoke comes out of it and the saw makes a loud noise, then this means that the carburetor is creating a mixture that is too rich. Highest engine speed less than normal. Soot forms in it. In case of such a problem, you need to turn H a little clockwise. Then they control the operation of the motor and, if necessary, repeat the setting.

If the saw squeals, this means that the engine is overheating, the exhaust is crackling, and there are misfires. This means that the mixture is unsaturated, and the highest engine speeds are higher than normal. This leads to engine overheating, piston and cylinder combustion, and spark plug burnout. If this problem occurs, adjustment should be made by turning H 1/4 turn counterclockwise.

If fuel does not flow into the combustion chamber, this problem is caused by a clogged fuel filter, nozzles or device channels. To troubleshoot the problem you will need complete disassembly filter and purging these channels using a compressor. Carburetor fluid is used to clean the channels.

It happens that there is an overflow of fuel in the carburetor. This happens if the membrane has failed, dried out and become rough, and began to put pressure on the rocker arm attached to the needle. Then the needle is adjusted. To change the membrane, you need to remove the carburetor.

The motor runs intermittently and does not pick up speed well. This happens when the filter is clogged. It is necessary to remove the cover of the device and clean it using detergents.

How to remove a carburetor

Before repairing or cleaning the carburetor, it must be dismantled and disconnected from other systems. Dismantling the carburetor is carried out as follows:

1. Remove the top cover. To do this, you need to unscrew the bolts (3 pieces) that are located around the perimeter of the cover.
2. Remove the carburetor filter.
3. Then disconnect the gasoline supply hose.
4. Disconnect the motor drive traction.
5. Unscrew the cable connection end.
6. Carefully remove and pull out the gasoline supply hose.

DIY disassembly

Disassembling the Homelite chainsaw carburetor is carried out as follows. Prepare a place - a flat surface. You will need the following tools:

• set of screwdrivers and wrenches;
• detergent composition;
• ultrasonic bath for cavitation;
• a large piece of cardboard.

After you have removed the carburetor, you should disassemble it. Disassembly of the carburetor is carried out in the order provided for by the design of the device.

The device details have small sizes, so they should be folded in order, making sure that no components are lost.

After disassembly, the device is troubleshooted and non-working parts and components are replaced. Wash the device with a special liquid, dry it, and wipe with a dry cloth. Blow out the tubes and jets with compressed air. Before this, they are treated with ultrasound to remove plaque.

How to clean

When doing the work yourself, you need to know approximately how to clean and flush the carburetor. Wash the device as follows:

1. Unscrew the screws on the device body.
2. Open the lid, take out small parts and lay them out on the fabric.
3. The walls of the device and all parts are treated with air from the compressor.
4. If carbon deposits remain on the components, they are wiped with a degreaser.
5. The components and body are dried.
6. Assemble all the components of the carburetor and install it on the chainsaw.

It is necessary to flush the carburetor if low-quality gasoline was used to refuel it or if a chainsaw was used severe frost. After cleaning, the engine will work better and the chainsaw will spin up faster.

The heart of an internal combustion engine is the carburetor. Just like in the human body - if there are interruptions in its work, the entire body ceases to function normally.

Carburetor diagnostics

You can diagnose a breakdown or an untuned carburetor yourself. If you observe the following chainsaw malfunctions, check the condition of the carburetor:

• the tool starts and stalls;
• increased vibrations, especially without load;
• the chainsaw stalls when you press the gas;
• copious exhaust with the smell of gasoline;
• The engine does not start at all, even with normal spark supply.

Consider the design of a gasoline carburetor

This unit is designed to form a mixture of gasoline and oxygen, which is then supplied to the cylinders for ignition.

Engine designers have determined the mixture parameters at which your tool will produce maximum power at minimum consumption fuel.

Accordingly, it is necessary to mix air and gasoline in certain proportions, and save a portion of the prepared mixture before feeding it into the intake manifold of the engine. This is what the carburetor does.

A needle connected to a float meters the amount of fuel entering the carburetor chamber. The air damper supplies a certain volume of air. The quality of the mixture depends on the coordinated operation of the entire mechanism.

To set operating parameters, as well as if adjustments are necessary (for example, when working in the mountains or when refueling with low-quality gasoline), adjustments are provided.

Unlike modern car engines, a chainsaw is a more primitive unit. Otherwise, its cost would be too high.

Practical tips for setting up a Champion chainsaw carburetor

Therefore, there is no correction for the formation of the fuel mixture, like many other electronic systems, used in modern internal combustion engines. These functions are assigned to the owner of the chainsaw.

We rose 100 meters above sea level, the mass fraction of oxygen in the air changed - we enrich the mixture. We changed the gasoline supplier (unfortunately, in our realities this is actual question), you need to update the settings again.