Stihl chainsaws - maintenance, repair and description of popular models

Shtil petrol chain saws are a true standard of quality for gardening equipment. Tools of this brand have earned enormous popularity due to their ease of use, excellent technical characteristics and versatility. We propose to consider the features of working with these chainsaws, as well as the most popular models from this manufacturer.

How to start a Shtil chainsaw - the correct procedure for starting the tool

Running in the Shtil chainsaw must be carried out strictly in accordance with the operating instructions for the tool. In this way, you will extend the life of the main spare parts of the unit and protect its main components from breakdowns.

Each Stihl chainsaw is started for the first time after purchase in this order:

1. First of all, you need to remove the protective cover and activate the chain brake of the saw by pressing it away from you;
2. Next, you will need to press the decompression valve to make it easier to start the engine;
3. After this, press the fuel pump several times;
4. Move the combination lever to the cold start position;
5. Place the saw on a flat surface, place your left hand on the saw handle, and with your right hand sharply pull out the starter cable;
6. As soon as the engine starts and stalls, move the combination lever to the middle position;
7. Pull out the starter cable again;
8. As soon as the engine starts again, sharply press the throttle lever to the full throttle position;
9. Release the brake by pulling the lever towards you;
10. Start cutting down the branches.

Each time you start working, start the saw only in this order. This will protect the tool from malfunctions and increase its service life.

When is carburetor adjustment required?

The new chainsaw is adjusted to the recommended mixture. All you need is fine tuning using three screws; there is no need to disassemble the carburetor. Purpose of adjusting screws:

• “L” regulates fuel supply at low speeds;
• “H” is needed to regulate the maximum fuel supply;
• "T" idle air control.

Since the saw carburetor is adjusted by ear while the engine is running, safety precautions must be observed. The saw must be positioned stable with the cutters pointed in a direction that is safe for those present.

Before starting manipulations, it is necessary to mark the initial position of the screws with paint or a felt-tip pen. The exact settings for the chainsaw carburetor for each model are in the operating instructions.

However, more often it is necessary to adjust the carburetor after eliminating a malfunction of the tool. The reasons may be:

• violation of the protective cap and unbalancing of the screws;
• wear of the engine piston, requiring a different mixture composition for operation;
• unsatisfactory performance of the carburetor itself.

How to adjust the carburetor on a specific model? Perform the operations sequentially, following the instructions. Here is the algorithm, the general sequence of actions.

There are two stages of setup:

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

The basic setting is carried out only for the fuel screws at low and high speeds. Smoothly and slowly, close the dampers completely until they stop. Also smoothly open both screws counterclockwise 1.5 turns. After this, start the engine and warm it up for 10 minutes.

How to adjust the carburetor on a chainsaw with the engine running:

• adjust the idle speed with screw “T” by rotating counterclockwise until the engine runs stable at idle speed;
• check the speed of the speed increase; when spinning slowly, turn screw L an additional 1/8 turn;
• Set the highest rotation speed using screw H on the tachometer;
• Check the carburetor operation at idle once and for all.

What kind of gasoline to pour into a Shtil chainsaw - follow the instructions

This question often worries people who have no experience working with chainsaws. According to the instruction manual, the optimal fuel for refueling saws of this brand is gasoline with an octane number of at least 90. It is very important to buy really high-quality fuel, otherwise you will often encounter gearbox and clutch breakdowns.

Another question is how to dilute gasoline for a Shtil chainsaw to 1 liter. According to the instructions, the ratio of oil to gasoline should be 1:50, that is, 20 ml. oil for 1 liter. fuel.

Without adhering to the proportions specified by the manufacturer, the owner of the saw will eventually notice that the tool does not start well when cold. This is due to the settling of oil residues on the cylinder walls, which block the formation of a spark.

Disassembling the Stihl 180 carburetor

First, it’s worth deciding why even tuning and repairing the stihl ms 180 carburetor may be necessary. Therefore, this needs to be done in the following cases:

• If the chainsaw does not idle;
• If the saw does not start, repairs may be required;
• There is a loss of strength;
• Increased fuel consumption;
• The chainsaw does not reach the highest speed.
• Stall during acceleration.

This list can be continued for a long time, but we have identified the main prerequisites. Before you start adjusting, you need to know what the main parts of the carburetor on a Stihl 180 chainsaw are, and who makes them.

Thus, the stihl ms one hundred and eighty carburetor was manufactured by a subsidiary of Stihl

called Zama. Dismantling the Stihl 180 chainsaw, part three Duration: adjusting the chainsaw carburetor. Adjusting and tuning the carburetor with a Stihl 250 chainsaw. Unique carburetors have the company logo on their body, guaranteeing product quality.

The carburetor of the Stihl one hundred and eighty chainsaw can be indiscriminately adjusted only by the number of idle speeds. It is impossible to increase or decrease the fuel supply in various modes using special screws. chainsaw two hundred and fifty when pressing on gas stalls, c. The manufacturer limits access to settings and does not install these screws. How to set the carburetor to the desired idle speed is very carefully described in the manufacturer's instructions.

To increase flow, the needle valve handle in the distribution chamber must be bent upward and decreased. Down. This regulates the needle stroke and, accordingly, the valve capacity.

Adjustment

there is no need to do it yourself, since it needs to be done very carefully, and in case of an error, it is almost impossible to return the handle to its original position.

After we have examined the carburetor design, it will not be difficult to find the reason why fuel enters the combustion chamber in a larger volume. This is due to wear of the gasket between the compensator cover and the carburetor body. Setting up the carburetor of a Stihl 180 chainsaw, a tip for which you can see. Are you asking what impact this might have?

READ How to Install a Soft Start on a Miter Saw

The answer is simple: by contracting, the gasket releases the diaphragm on top of it a fraction of a mm downwards. She, in turn, will press harder on the needle valve swing, open more than it should, and there will be excess fuel (it will begin to overflow).

Another reason why the diaphragm itself stretches is that it occurs over time due to normal wear and tear. It is impossible to prevent this process, but you can solve the problem by periodically changing all gaskets, carburetor diaphragms and fuel pump. If your chainsaw starts to sneeze and won't start well, it's time to adjust the carburetor on your Stihl two hundred and fifty chainsaw yourself. There is a repair kit for this.

As follows from the instructions, before long-term storage it is necessary to drain the fuel from the tank, then start the pollen and burn the gasoline from the carburetor. The structure of the Stihl chainsaw one hundred and eighty and the adjustment of the carburetor of the Stihl chainsaw one hundred and eighty ms two hundred thirty ms two hundred and fifty Failure to comply with this usual rule entails the following consequences.

The forknoi valve, being in some contact with the fuel, sticks to the body as the gasoline gradually evaporates and only sticky oil remains. It is impossible to change the attachments, since they are not included in the repair kit, you can only test it, knock it out and wash it, which is not always possible without damaging the attachment.

In order to blow, change gaskets or needle valve, the carburetor must be disassembled. To do this, unscrew the four screws on the expansion joint cover and one on the fuel pump.

Once you open the housing, you must be as careful as possible, because if debris gets into the inside of the carburetor, it will make it impossible to operate. The thickness of the channels in it is comparable to the width of a thread or even a human hair.

For Stihl one hundred and eighty carburetor repair you can see below. In it, the master is thoroughly aware of the problems and clearly shows the entire repair process.

Trimmers and chainsaws

Adjustment

chainsaw carburetor using the example of STIHL MS 250

The main role in adjusting the carburetor of the “Table” chainsaw is played by the upper screw (closest to the muffler).

According to the factory parameters (indicated on the cover of the chainsaw), it should be unscrewed one turn, and then corrected; if it is unscrewed, then the working mixture will become richer (more gasoline enters the air-fuel mixture), if this screw is screwed in, the working mixture will become more liquid (less gasoline enters the air-fuel mixture).

Before adjusting the carburetor of a Stihl chainsaw, it is necessary to service the chainsaw (clean the chainsaw carburetor, wash the chainsaw engine, replace the spark plug, clean the air filter, check the chain tension, adjust the idle speed, warm up the engine).

1. Screw in screws H and L (with the chainsaw muted) until they stop, and then turn both out one turn. 2. In this mode, we adjust the Stihl ms two hundred and fifty carburetor chainsaw for repair. Start the chainsaw and warm it up. Adjusting the carburetor of a chainsaw is it necessary to adjust the carburetor of a NOT Stihl 180? Causes. Adjusting the carburetor of chainsaws 180, 230, two hundred and fifty and others.

Give full throttle and propeller H to achieve maximum engine speed of fourteen thousand rpm. Tachometer (based on engine speed meter). Keep the maximum speed for regulation for no more than ten seconds! 3. What is the distance of the starter from the pillars to the module?, Which is the correct adjustment of the chainsaw carburetor?, Style two hundred and fifty ms.

Using the LA idle stop bolt, move the chain and then turn the bolt ¼ counterclockwise.

4. If after this adjustment of the chainsaw carburetor, the idle speed is not stable, but the chainsaw accelerates well, then you need to turn screw L slightly counterclockwise until the chainsaw quickly picks up speed and runs well at idle. To do this, I adjusted the carburetor of the Stihl two hundred and fifty chainsaw myself. Then correct the LA bolt (the idle speed on the tachometer should be two thousand eight hundred rpm).

Note: will not adjust the chainsaw carburetor if air is leaking into the engine from the air drain (through the gasket under the carburetor, through the carburetor accelerator pump, through the chainsaw crankshaft seals or otherwise).

For an independent version of the carburetor, you need to familiarize yourself with its structure and understand the operating procedure that is performed to configure the parts responsible for the proper functioning of the components of the device and parts close to it.

READ Chainsaw Tatra Ms 190 Video

It is necessary to carefully handle the elements of the system variant, and also determine whether the specified characteristics correspond to very acceptable values.

The carburetor serves to mix the combustible mixture with air, observing pre-established proportions. If precise doses are not followed, the serviceability of the engine is at risk. When a huge amount of air enters during mixing of a component, but there is not enough fuel, then such a mixture is considered poor.

Oversaturation should not be allowed, since a large amount of fuel compared to air can also cause engine malfunctions or wear. Do it yourself repair the Stihl chainsaw one hundred eighty 142, 240, three hundred sixty five do it yourself. Carburetor adjustment is necessary not only before initial introduction, but also when there are any differences in its operation. Before using the chainsaw, be sure to start it.

Carburetor components

The carburetor design contains a standard set of parts, but may vary depending on the manufacturer. Components:

• The basis. Turn on the carburetor settings yourself. This is a special tube that visually resembles an aerodynamic structure. Air passes through it. A damper is placed in the transverse direction in the middle of the pipe. Its position can be changed. The more it is pushed into the passage, the less air gets into the engine.
• Diffuser. This is the conical part of the tube. With its help, air flow increases precisely in the segment from which fuel flows.
• Fuel supply channels. The fuel mixture is contained in the float chamber, then passes into the nozzle, from which it flows into the sprayer.
• Float chamber. This is a separate structural element that resembles the shape of a tank. Designed to constantly maintain the optimal level of fuel fluid before entering the channel from which air enters.

Are you looking for models that are cheaper, but reliable and time-tested? Pay attention to Russian-made chainsaws.

Also, research foreign chainsaw manufacturers such as Stihl.

Every carburetor owner should have the necessary tools to set up this system. There are three adjustment screws on the device body. They have their own markings:

• Screw for correcting low rpm.
• H screw for high speed regulation.
• T regulates the idle speed, in most cases used for experiments.

Chainsaw air filter

Before setting up the carburetor, you need to prepare the device:

• The engine warms up, that is, it starts about ten minutes before repairs, and turns off when you start working (see how to start a chainsaw).
• The air filter is checked and washed.
• The chain stops, returning screw T as far as it will go (see Chain Oil).

Shtil chainsaw does not start - causes and solutions

Each Stihl chainsaw has a lot of advantages. However, even such equipment can fail and simply won’t start. Below are examples of breakdowns that prevent the starting of tools of this brand:

• Oil floods the spark plug - incorrect proportion of oil and gasoline for a chainsaw Calmness or the use of a low-quality chain lubricant causes oil to get on the spark plug, which creates a spark. The place where the lubricant flows out is the area where the hose of the oil tank and the pump meet. In this case, the leakage area should be sealed with sealant and allowed to dry;
• No fuel mixture is supplied to the engine. This breakdown is associated with a malfunction of the breather. If a plug has formed in it, you will need to remove it and clean the walls of the breather from accumulations;
• A Stihl chainsaw may not start if the chain is not lubricated. In this case, you will need to inspect the lubricant reservoir for holes. If a crack has formed in the tank, it should be replaced immediately to avoid problems with the carburetor. Lack of oil supply also causes the chain on a chainsaw to break. The fact is that in the absence of oil, the chain begins to wear out and eventually breaks.

Very often, saw owners are faced with a problem in which the tool starts and stalls - the reason for this lies in a clogged carburetor.
Repairs are carried out with the obligatory dismantling of the element and its complete cleaning of debris; If the tool does not start, this may be due to the fact that there is no spark on the Stihl chainsaw. In this case, experts advise immediately replacing the spark plug;

If your Stihl chainsaw stalls when you press the gas, this is due to a faulty cylinder. Fixing the problem yourself includes inspecting the cylinder and replacing it if it becomes chipped or scratched.

Let's look at each fault in more detail.

RPM fluctuates at idle

How to understand that the speed is floating. The chainsaw does not work stably. It either stalls or roars without load.

One of the most common reasons that may arise is a malfunction of the jets. Their clogging. The reason why jets become unusable is most often the poor quality of gasoline and the debris that gets in when filling the tank. Therefore, first of all, when pouring fuel into the tank, it is necessary to use a funnel with a special mesh. This mesh will prevent debris from getting into the tank.

Also, do not rule out a malfunction in the fuel system itself. It is necessary to check the integrity of the hoses and reliable tightening in order to avoid air leaks and gasoline leaks.

It's also worth checking the check valve. If it is not working properly, a vacuum is created in the gas tank. Gasoline leaves and air must take its place. If this does not happen, a vacuum is created. The engine simply does not have enough fuel, it begins to stall.

The air supply to the distribution chamber should be adjusted using the adjusting screw. If there is not enough air, the mixture turns out lean. It enters the combustion chamber, but without air it does not ignite. Consequently, the spark plugs are filled with gasoline and the chainsaw stalls.

Chainsaw won't start

The chainsaw may not start for two reasons. Either it doesn't have enough air or fuel. The mixture is either lean or too rich. To eliminate the malfunction, the quality of the fuel mixture should be adjusted. How to properly adjust the carburetor of the Shtil 180 chainsaw was described in the previous paragraph.

prokarbyrator.ru

Loss of power, high gas consumption

It is necessary to check the fuel supply system for air leaks. Excess air entering the system leads to a richer fuel mixture. You should check the tension of the chainsaw chain. A heavily tensioned chain causes increased pressure on the engine. It is more difficult for him to cope with his work.

High gas mileage may be caused by fuel leaks. Such smudges can be easily detected by greasy oil stains on the body of the chainsaw and in places where connections are not tight. The sealing gaskets may need to be replaced. It is better to entrust such work to a certified specialist.

Structurally, the carburetor of the Shtil 180 chainsaw has a fairly simple design. In addition, the manufacturer has greatly limited the range of possible adjustments. Leaving one single option to adjust the idle speed. This procedure does not require special knowledge. It will not be difficult for an unprepared person to correctly and competently adjust the carburetor of a chainsaw on his own.

Adjusting the carburetor of a Stihl chainsaw - a detailed algorithm of actions

If your chainsaw stalls when you press the gas, you should adjust the tool's carburetor. Before this, it must be cleaned of contaminants, the spark plug changed, the air filter cleaned and the idle speed adjusted.

The adjustment procedure is as follows:

• Stop the saw and tighten screws L and H until they stop;
• Next, unscrew both screws 1 full turn;
• Start the saw and warm it up;
• Press and hold the gas lever, while turning screw H until the engine speed becomes stable;
• Then turn the LA screw until the chain begins to move, and then immediately turn the screw a quarter turn counterclockwise.

After completing these simple manipulations, you can continue working with the chainsaw. If immediately after adjustment you notice that the instrument does not muffle, then you will need to turn the LA screw counterclockwise a little more.

Adjustment

When purchasing a new chainsaw, the Stihl MS 250 carburetor does not require adjustment - everything is set up from the factory and ready to go! It is required only after a certain period of operation, as a result of which its parts have worn out or broken.

Another reason why you need to disassemble the carburetor is debris getting into the channels. In this case, it is enough to disassemble everything, wash it in gasoline, blow all channels with compressed air and put it back together.

When to adjust?

The first sign that the carburetor needs to be cleaned and adjusted is black (rich mixture) or very light (lean mixture) carbon deposits on the glow plug. With normal adjustments, an optimal ratio of gasoline to oil and a correctly adjusted fuel supply to the internal combustion chamber, the soot on the spark plug will be gray-brick.

Required Tools

To adjust, you will need a tool that everyone has: a set of screwdrivers, a set of open-end wrenches.

The materials you will need are rags and kerosene (gasoline) for washing parts.

Tachometer – for precise adjustment of carburetor speed. This is an important thing, but you can do without it.

Preparation

Before adjusting the carburetor, perform preventive maintenance of the unit:

1. The air filter is cleaned;
2. The entire carburetor is cleaned;
3. The engine is cleaned and washed from dust and dirt;
4. The circuit is being adjusted;
5. The spark plug is cleaned or replaced.

Setup instructions

Step-by-step algorithm for adjusting the Zama C1Q-S85 carburetor on a Stihl MS 250 chainsaw:

1. After stopping the engine, it is necessary to completely tighten the screws “H” and “L”, and then unscrew each one full turn.
2. Next, you should start the engine - the chainsaw should idle for 5-10 minutes.
3. By adjusting screw “H” you need to achieve maximum engine speed (14,000 rpm) with the throttle fully depressed. To accurately determine engine speed, use a chainsaw tachometer. If it is not there, the adjustment should be made by ear - you need to set the maximum speed and then reduce it by about 20-25%.
4. Using the “LA” screw, you need to adjust the idle speed so that the chain on the bar rotates slightly, and then you need to unscrew the “LA” screw 1/4 turn.
5. If the chainsaw stalls or the speed constantly changes, you need to unscrew the “L” screw, and the engine speed should increase.
6. Next, use the “LA” screw to set the optimal engine idle speed, while the Stihl MS 250 should operate at 2600 rpm. This is idle speed.

If the carburetor or cylinder is sucking air, these procedures may not help. Air can enter the engine through a leaky carburetor gasket, crankshaft seals, or accelerator pump.

How to fix this problem, see the video below; the author also talks about adjusting the Zama C1Q-S85 carburetor. In the example, the chainsaw does not start well and stalls during operation.

Setup video

We also suggest you watch another interesting video, the author of which clearly shows how to adjust the carburetor on a Stihl MS 250 chainsaw.

How to choose a Stihl chainsaw - expert advice

The range of Shtil chainsaws is quite large, and in addition, Chinese copies of tools from this famous brand are often found on the market. To avoid getting caught with a non-original saw, you should follow several rules:

• Carefully review the instrument documentation. The country of origin of most Stihl models is Germany, and it is this country that must be indicated in the unit passport;
• Inspect the body of the chainsaw - a high-quality original tool should not be scratched, and the paintwork should be distributed evenly and without stains;
• Make sure the drive sprocket is installed straight and without distortion. Manufacturers from China often “sin” by mounting this part with slight deviations from the vertical axis;
• Examine the fasteners on the chainsaw - they should be screwed in evenly and have intact “hats”;
• When first started, an original Stihl chainsaw should not make an incomprehensible knock from the motor, but, on the contrary, should operate smoothly and stably.

Only after making sure that the model you have chosen fully meets all the described requirements can you buy it.

About the carburetor design

The carburetor is used to mix the combustible mixture with air in compliance with predetermined proportions. If the exact doses are not observed, the engine's proper functioning is at risk. When, during mixing of components, a large amount of air enters, but not enough fuel, then such a mixture is considered “lean”.

Oversaturation should not be allowed, since a large amount of fuel compared to air can also cause malfunctions or engine wear. Carburetor adjustment is needed not only before initial use, but also when any deviations in its operation are detected. Before starting to work with a chainsaw, do not forget to run it in.

Carburetor components

The carburetor design contains a standard set of elements, but may vary slightly depending on the manufacturer. Components:

1. The basis . This is a special tube that is visually similar to an aerodynamic design. Air passes through it. In the transverse direction, a damper is located in the middle of the pipe. Its position can be changed. The more it is extended into the passage, the less air enters the engine.
2. Diffuser . This is the constricted part of the tube. With its help, the air supply speed increases precisely in the segment from which the fuel comes out.
3. Channels for fuel supply. The fuel mixture is contained in the float chamber, then passes into the nozzle, from which it flows into the atomizer.
4. Float chamber . It is a separate structural element, reminiscent of the shape of a tank. Designed to constantly maintain the optimal level of fuel fluid before entering the channel from which air enters.

Don't know which chainsaw to choose? Read our article.

Are you looking for cheaper models, but reliable and time-tested? Pay attention to Russian-made chainsaws.

Or explore foreign chainsaw manufacturers such as Shtil.

Homemade products from Shtil chainsaws - learning from folk craftsmen

The high power and simple design of the Shtil chainsaw allows its owners to use the tool for making various useful homemade products. Among the most popular chainsaw products it is necessary to highlight:

• Grinder – this design is based on a shaft with a bearing unit. One end of the shaft is equipped with a driven pulley, which is driven by a V-belt. The other end of the shaft is equipped with a mandrel to which cutting wheels are attached. This unit can be used for cutting stones, bricks and metal;
• Wood splitter - to make it you will need to weld a strong metal frame that will hold the saw suspended. The saw element will be fed to the firewood using a guide located in a vertical position. This tool will allow you to cut a large amount of firewood without holding the chainsaw in your hands;
• Ice screw - you will need to ensure a low auger speed. To do this, use a worm or V-belt gearbox. This motorized drill will help make holes in the ground when building a pile foundation, and can also be used to make holes for winter fishing;
• The sawmill is another unit that requires the manufacture of a frame and fastening of guides. But unlike a wood splitter, firewood will be fed to the saw element in a horizontal position.

Each of the described devices has found wide application in the household. If necessary, these units can always be disassembled and the engine and other spare parts can be installed back on the chainsaw.

Chainsaw CARVER - starting problems and repairs

Chainsaw CARVER

PROMO PSG 45-15 The first serious test and the first breakdowns How to check and find it yourself.

Basic carburetor adjustment.

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

Checking and adjusting idle speed.

Finding the highest idle

, to do this, slowly turn screw L in different directions. After finding the position of the highest engine speed, turn screw L 1/4 turn counterclockwise. If the chain rotates at idle, screw T or (S) should be turned counterclockwise until it stops.

Checking and adjusting the maximum speed.

The maximum number of revolutions is changed using screw H. When it is turned in (clockwise rotation), the speed increases, and when turned out, it decreases. Chainsaw engines have the highest rotation speed from 11,500 rpm. up to 15000 rpm. A higher speed is not ensured by the ignition, in addition, it becomes dangerous for the engine. Limit speeds can be determined by interruptions in ignition. If they step, screw H is turned slightly counterclockwise

.

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

When you smoothly press the gas trigger, the engine should confidently and quickly pick up speed from idle to maximum (from 2800 rev. to 11500-15000 rev., depending on the unit). If the speed is gained slowly, with a delay, screw L must be slowly turned counterclockwise

, but no more than 1/8 of a turn.

After adjusting the acceleration and maximum speed, you should check the operation of the saw again at idle speed - the engine should run steadily, the chain should not move. The chainsaw adjustment must be repeated if this condition is not met, except for the basic adjustment stage.

A chainsaw is a tool that is useful in any country house, even for amateurs, not to mention professional workers. But, like any other device, a chainsaw needs constant care and prevention. One of the most common procedures is to adjust the carburetor of a chainsaw due to incorrect settings in the past.

Saw Stihl MS 180 - the best option for a gardener

The design of the saw includes such useful elements as an automatic lubricant supply system, an inertial brake and a vibration damping system.

Among the characteristics of the unit are:

• Power – 1.5 kW or 2.1 l. With.;
• Cylinder volume – 32 cm3;
• Oil tank capacity – 140 ml;
• Fuel tank volume – 250 ml;
• Working weight – 5.1 kg.

This saw is distinguished by its high reliability and durability. The tool kit includes a 50-link chain, a bar, a case and documentation.

How to properly adjust a factory saw

Carburetor adjustment is divided into two main stages. The first one is called basic. It is performed with the engine running. The second is performed when the engine is warm.

To carry out the carburetor setup procedure successfully, you need to read the operating instructions for a specific model in advance to identify additional features of setting up the device.

First stage

The adjusting screws for the highest and lowest speeds should be moved clockwise until the highest resistance is met. When the screws reach the stop, you need to move them in the opposite direction and leave them 1.5 turns.

Main stage

The engine is turned on at medium speed and warms up for about 10 minutes. The screw responsible for adjusting the idle speed should move clockwise. It is released only when the engine reaches stable operation mode. It is necessary to ensure that the chain does not move during this process.

Carburetor adjustment

In idling mode, the engine may stall (the reason is here). In this case, you must immediately turn the adjusting screw clockwise until it stops. Sometimes the chain starts to move. In this case, turn the adjusting screw in the opposite direction.

Checking acceleration operation

Need to do a little research. Acceleration of the device is initiated. It is necessary to evaluate the proper operation of the engine during maximum speed. When the engine is functioning correctly, it means that when you press the accelerator, the speed quickly increases to 15,000 rpm.

If this does not happen or the increase in speed is too slow, you must use the screw marked L. It turns counterclockwise. Moderate movements must be observed, since the turn cannot be more than 1/8 of a full circle.

How to adjust the maximum number of revolutions

To limit this indicator, you need to use a screw marked H. To increase the number of revolutions, turn it clockwise, and to reduce them in the opposite direction. The maximum frequency should not exceed 15000 rpm.

If you make this figure larger, the device’s engine will wear out, which will lead to problems in the ignition system. When rotating this screw, you need to take into account the ignition processes of the device. If the slightest malfunctions appear, then the maximum speed value must be reduced.

Final check at idle

Before this procedure, it is necessary to carry out a full adjustment of the carburetor components when operating at maximum speed. Next, you should check the functioning of the device in idle cold mode. When the correct adjustment parameters are achieved, you will notice that the carburetor design closely matches the following criteria:

1. When the idle cold mode is activated, the chain does not move.

   
   Chainsaw accelerator

2. When the accelerator is pressed even slightly, the engine accelerates at an accelerated pace. With gradual deepening of pressure, you can notice that the engine speed increases proportionately, reaching the maximum permissible values.
3. When the engine is running, you can compare its sound to a four-stroke device.

If violations are noticed in the given parameters or the device has not been fully adjusted, you need to perform the main setup step again. Sometimes actions are performed incorrectly. In this case, the device may fail due to the loss of the correct node settings. In this case, you will have to contact a specialist.

Disassembling the carburetor if necessary to check or repair components

The design of different carburetor models is almost the same, so when working with them you can use the standard scheme. All elements must be removed carefully, and then laid out in the order given below , so that you can successfully place the items in place after the completion of the repair work.

Removing the Top Cover

1. The top cover is removed. To do this, you need to unscrew the 3 bolts holding it in a circle.
2. The foam rubber is also removed, since it is the upper component of the filter that conducts air.
3. The fuel hose is removed.
4. The drive thrust is output directly to it.
5. The cable end is disconnected.
6. The gasoline hose can be completely removed if you systematically pull it off the fitting.

To finally prepare the carburetor for major repairs or replacement of the smallest parts, you need to carefully disconnect it from the main system . Sometimes further disassembly is required. You should unscrew the components carefully and put the fasteners in groups, as these small parts are easily lost.

How to properly adjust a Chinese-made saw - adjustment instructions

To correctly configure the carburetor of a Chinese chainsaw, you must first remember the factory settings of the device, then turn on the engine. Subsequently, you will have to leave it running for several hours in order to accurately set your own parameters. Sometimes work is carried out only after ten minutes of engine operation, but many Chinese-made models require special handling.

Chinese chainsaw model

Adjustment procedure:

1. Activities begin in idle mode . Using the adjusting screws, you need to achieve a systematic increase in engine speed, so you should first let it run at low speeds. A deviation from the norm is the movement of the chain along the bus. In this case, you need to adjust the outer screws to the optimal position so that the chain remains motionless.
2. The transition to medium speed speed is carried out. Sometimes the engine starts to smoke. This defect can be eliminated by tightening the screw to supply a leaner fuel mixture.
   

   In this case, the smoke will disappear, but the engine speed will increase. You need to adjust the settings until you reach a level where, when you press the throttle, the engine smoothly picks up speed, and no sudden jerks or interruptions are heard.

3. The device's engine is being checked . The chainsaw is switched to minimum speed, and then the lever is quickly pressed. When pressed maximally, it is held for 3 seconds. If there are problems with the engine, you need to gradually loosen the screw until the optimal position is reached.
4. The chainsaw should work for several hours in real conditions . You need to cut wood, and then inspect all the elements involved in this event. If there are deviations, they must be corrected using adjusting devices. When all defects have been eliminated and the optimal settings have been established to supply correctly concentrated fuel, the device setup process can be considered complete.

Before purchasing, we recommend that you familiarize yourself with the rating of chainsaws for reliability and quality. Take a look at the video:

Models Stihl MS 210 and MS 310 – features and equipment

These tools have almost identical characteristics and are used to harvest large quantities of firewood for further storage or construction.

Technical indicators of the models include:

• Cylinder volume – 35.5 cm3;
• Power – 1.7 W or 2.4 l. With.;
• The capacity of the fuel tank is 470 and 500 ml, respectively;
• The volume of the oil tank is 250 and 300 ml, respectively;
• Weight – 6.3 and 7 kg, respectively.

The design of the chainsaws includes an automatic fuel supply system and an improved inertia brake. The complete set of models consists of a chain, a bar, a cover, an instruction manual and a warranty card.

Saw Stihl MS 360 and MS 231 16 - technical specifications of the model

Each professional chainsaw of these two models has gained popularity among experienced gardeners with large garden plots.

Model specifications include:

• Cylinder volume – 59.5 and 45 cm3, respectively;
• Saw power – 4.6 and 3 liters. c. respectively;
• Each model has a unique chainsaw sharpening level;
• The volume of the fuel mixture tank is 565 and 400 ml, respectively;
• Assembled weight – 7 and 5 kg, respectively.

These models have proven themselves well in extreme conditions. They can be used at any time of the year without worrying about the breakdown of important parts of the tools.

Why is carburetor adjustment necessary?

Proper carburetor adjustment increases fuel efficiency. Adjusting the device to factory parameters increases the power of the saw while significantly reducing the cost of wood processing.

Chainsaw carburetor diagram and device description

Attention! When operating the saw, use fuel in a ratio of 15:1 (add 1 liter of oil to 15 liters of gasoline). Do not use the tool when the oil quantity is reduced.

Stihl MS 150 TC E and MS 170 14 – areas of application and equipment

These models are designed with an effective inertia brake that quickly stops the tire during a kickback.

Among the technical characteristics of the units, the following stand out:

• Cylinder volume – 23.5 and 30 cm3, respectively;
• Model power is 1.35 and 1.8 liters. With. respectively;
• Tank capacity for fuel mixture – 210 ml in MS 150 and 250 ml in MS 170:
• Oil tank volume – 150 ml;
• Working weight – 4 kg and 4 kg respectively.

The saw package includes a bar, chain, instructions and a warranty card.

Models Stihl MS 181 and MS 192 T – features and applications

These units have a simple design and a set of all functions necessary for operation - automatic chain lubrication, inertial brake, easy starting system.

Among the characteristics of chainsaws it is necessary to highlight:

• Cylinder volume – 32 cm3;
• The power of the models is 2 and 2.5 liters. With. respectively;
• The volume of the fuel tank is 280 and 350 ml, respectively;
• The capacity of the oil tank is 180 and 230 ml, respectively;
• Working weight – 5.5 and 6.2 kg, respectively.

If desired, these models can be used in other areas. Using attachments on a Stihl chainsaw, each of these models can be used for cutting stone and brick, as well as for cleaning wood.

Stihl MS 261 and MS 270 – areas of application for chainsaws

Both of these models are an excellent choice for those who want to get quality equipment for little money.

Model specifications include:

• Cylinder volume – 50.2 and 51 cm3, respectively;
• Power – 3.7 and 4 liters. With. respectively;
• Fuel tank volume – 500 ml:
• The tank capacity for chain lubrication is 275 ml;
• Working weight – 5.5 and 7 kg, respectively.

Both models cope successfully with regular sawing of large logs, harvesting wood and lightening forests.

Models Stihl MS 271 and MS 280 - characteristics and equipment

These models are universal units. They have sufficient power for operation in difficult conditions when cutting down trees in the forest and garden.

Key saw features include:

• Cylinder volume – 51 and 53 cm3, respectively;
• Power – 3.9 and 4.1 liters. With. respectively;
• Fuel tank capacity – 500 ml;
• Oil tank volume – 250 ml;
• Working weight – 7 and 7.5 kg, respectively.

Both models come with durable tires, covers, chains and instruction manuals.

Specifications

The Stihl MS-660 professional chainsaw is equipped with a fifty-one cm variable bar and a spare chain. Replacing parts is quick, which makes it possible to work with thick trunks and then cut out branches.

The Chinese chainsaw has the following characteristics:

• Power 7.1 hp (5.22 kW)
• Engine capacity 91.6 cm³;
• Chain saw pitch nine mm;
• Chain thickness 1.6 cm;
• Number of links in chains 72, 90, 162;
• Fuel consumption 0.4-0.8 l/h;
• Fuel tank capacity 0.83 l
• Oil tank capacity 0.36 l
• Tire length 40, 50, ninety cm;
• Weight fully charged 7.3 kg.

Specifications may vary slightly as manufacturers make changes and modifications to their products.

Stihl MS 290 and MS 341 – design and applications

These powerful models can be used in a wide variety of applications. They are used for domestic needs, in construction with a bark beetle attachment and other devices. The design of the models includes a vibration damping system, an inertia brake and an easy start system.

Among the characteristics of saws it is necessary to highlight:

• Cylinder volume – 57 and 59 cm3, respectively;
• The power of the models is 4.1 and 4.5 liters. With. respectively;
• The volume of the fuel tank is 560 and 600 ml, respectively;
• The capacity of the oil tank is 250 and 300 ml, respectively;
• Weight – 7 and 7.8 kg, respectively.

These models are quite popular, so you can always buy a high-quality branded bag for their safe storage. If you want to save money, model owners can purchase a chain sharpening machine.

How to adjust the carburetor on chainsaws

To understand how to properly adjust the carburetor on a chainsaw, you need to see it, and therefore we invite the reader to pay attention to the example below.

PHOTO: rmnt.ru Arrows indicate carburetor adjustment screws

To make the adjustment, you only need a slotted screwdriver, but it will not be possible to perfectly accurately adjust the carburetor without a tachometer (of course, if the person is not a mechanic or an experienced professional driver). Now let's try to understand how to adjust the carburetor in a given situation.

PHOTO: shukur.ru This slotted screwdriver is quite enough to adjust the carburetor of a chainsaw

How to adjust the carburetor of a chainsaw if it doesn’t start at all

A fairly common problem in cases where a “master” from the “I know everything” series tries to get into the settings with hands that do not grow from his shoulders. In such a case, there are standard screw positions from which you can “dance” further. First you need to tighten both screws completely (don't be too zealous). Next unscrew:

• screw L – one turn;
• screw H – one and a half turns.

PHOTO: withoutahitch.com.au Each screw is marked and there are holes in the housing for adjustment

As for the idle speed screw, the throttle must first be completely closed (screw T turned out). After this, you need to turn it one and a half turns clockwise and try to start the engine. If it doesn’t work, gradually add a quarter turn at a time until starting. When the engine starts running, the position of the idle screw is adjusted so that the internal combustion engine does not stall, but the chain remains in place.

PHOTO: xoznik.ru After this, the engine must be started and run for 8-10 minutes. During operation, preliminary adjustment of the idle speed is possible. When the engine is warm, you can begin fine tuning.

Related article:

Machine for sharpening chainsaw chains : selection criteria, design features, technical and operational characteristics of the equipment, operating principles of manual and automatic devices, review of popular models of sharpening machines.

How to correctly and accurately adjust the carburetor: step-by-step instructions

To make the information easier to perceive, we suggest looking at it on the basis of photographic examples with descriptions of actions in tabular form. The basis is a chainsaw with initial settings.

You can learn more about the master class on adjusting the carburetor of a chainsaw in this video.

Stihl MS 362 and MS 440 – characteristics and equipment

These models belong to the class of professional chainsaws for working in the forest. In addition, the MC 440 model is also widely used in construction for harvesting large quantities of wood.

Unit characteristics include:

• Cylinder volume – 59 and 61 cm3, respectively;
• The power of the models is 4.6 and 5 liters. With. respectively;
• The volume of the fuel tank is 600 ml;
• Oil tank capacity – 325 ml;
• Working weight – 7 and 7.5 kg, respectively.

Each model includes a tire, cover, chain and documentation.

Chainsaws Stihl MS 441 and MS 461 – areas of tool use

These models are regularly used for felling timber and sawing thick logs for construction. They can withstand significant loads and can be used both in hot weather and at extremely low temperatures.

Saw features include:

• Cylinder volume – 72 and 75 cm3, respectively;
• The power of the models is 5.5 and 6 liters. With. respectively;
• Fuel tank capacity – 725 and 800 ml;
• The capacity of the oil tank is 360 and 400 ml, respectively;
• Working weight – 7.5 and 8 kg, respectively.

Both models are equipped with a modified inertial brake, an effective vibration damping system and a device for easier engine starting.

Models Stihl MS 650 and MS 880 – characteristics and equipment

These models are popular due to their absolute versatility. They are among the most powerful professional tools in the class. These units are used primarily for felling wood and construction, since their high cost does not allow these models to be used in everyday life.

Among the technical characteristics of the saw it is necessary to highlight:

• Cylinder volume – 85 and 90 cm3, respectively;
• Power – 6.4 and 7 liters. With. respectively;
• Fuel tank volume – 820 ml;
• Oil tank capacity – 500 ml;
• Working weight – 8 and 8.5 kg, respectively.

The saw package includes a durable chain, bar, cover, instructions and warranty card.

Saw Stiga SP 405 Q – description and applications

This model belongs to the class of semi-professional units. With good performance, it can be used not only in the garden, but also for the purpose of irregular felling of trees.

Model characteristics include:

• Cylinder volume – 40 cm3;
• Saw power – 2 l. With. or 1500 Watt;
• Fuel tank volume – 410 ml;
• Oil tank capacity – 200 ml;
• Operating weight – 6 kg.

The saw does an excellent job of sawing logs, both in winter and summer. The unit includes instructions, a chain, a tire, a container for preparing fuel and a warranty card.

How does a carburetor work?

1. When starting the engine, the air damper in the carburetor opens.
2. The movement of the piston reduces the pressure in the air valve. This causes air to enter the diffuser. Its exact amount depends on the position of the air damper.
3. Fuel enters the float chamber. The jets regulate the speed at which this happens.
4. Gasoline and air mix with each other in a diffuser to form a fuel-air mixture. It is directed into the cylinder. The mixture can be lean (lots of air, little petrol) or rich (little air, lots of petrol). Its power and speed depend directly on the amount of mixture entering the engine.

All processes occurring in the engine do not have a cyclical, but a constant basis.