How To Adjust The Carburetor On A Stihl 180 Chainsaw

Chainsaw Stihl 180; device and adjustment of the carburetor

The main elements of the carburetor chainsaw Stihl MS 180. Methods of adjustment, removal, disassembly and repair. Troubleshooting tips.

Nozzle

The fuel injector is mounted in the carburetor body in such a way that it is a connecting link between the distribution chamber and the cavity in which the throttle valve is installed. Simultaneously with the fuel, air is supplied to the nozzle and an air mixture is formed. The nozzle has a check valve that blocks the flow of air in the reverse sequence, that is, from the throttle chamber to the distribution chamber.

Air damper

The carburetor choke is installed on the opposite side of the throttle and is responsible for starting a cold engine, it is controlled by the engine control lever. For a cold start, the air damper is completely closed, for normal operation it is opened.

How To Adjust The Carburetor On A Stihl 180 Chainsaw

Throttle flap

The throttle valve is installed in the carburetor body and is responsible for increasing the supply of the fuel mixture directly to the engine cylinder. At the moment of pressing the gas, the throttle valve opens slightly, thereby increasing the throughput of the channel and the fuel from the carburetor cavity, rushes into the cylinder in a larger volume.

Combustion of a larger volume of fuel increases the amount of generated energy, which affects the power and speed of the processes. The damper is mounted on a shaft running through the entire carburetor body. At the exit of the shaft from the body, a mount for the gas cable is installed, a cone-shaped adjusting screw is located nearby, which is responsible for adjusting the idle speed. By tightening the screw, you can slightly adjust the position of the shaft and the damper installed on it, thereby increasing or decreasing the idle speed, slightly opening or closing the damper.

Stihl 180 carburetor device

So, the stihl ms 180 carburetor is developed and produced by a subsidiary of Stihl, called Zama. Original carburetors have a company logo on their body, which guarantees the quality of products.

When to adjust the Stihl 180 carburetor

First, it is worth deciding why it may even be necessary to adjust and repair the stihl ms 180 carburetor. So, this must be done in the following cases:

  • If the chainsaw does not keep idling;
  • Repairs may be required if the saw does not start;
  • There is a loss of power;
  • Increased fuel consumption;
  • The chainsaw does not reach maximum revs.
  • Stalls when accelerating.

This list can be continued for a long time, but we have identified the main reasons. Before proceeding with the adjustment, you need to know what are the main parts of the carburetor on the Stihl 180 chainsaw, and who makes it.

Distribution chamber

In the distribution chamber, as in the fuel pump, there is also a membrane that opens and regulates the fuel supply by pressing a special rocker, which raises its needle valve.

The cover of the chamber is the compensator body, which is attached to the carburetor with four screws; a gasket is installed between the body and the cover, which increases the height of the chamber and is responsible for sealing.

What to fill with oil for chainsaw Stihl 180 (stihl 180)

  1. Spend some money on the original oil. Stihl HP 2-stroke oil costs a little more, but cleaning is even more expensive.
  2. High-quality fuel can also be poured into Mobile 1, and a three-phase one is suitable for lubrication, in no case do not fill the workings.
  3. From inexpensive options, mineral oil 15-40, in winter 10-30. You can M8, for example, or M10.

Remember your personal safety when working with your chainsaw.

Remember that the quality of the oil being poured affects the operation of the chainsaw. Poor quality oil can cause ineffective tool performance and adversely affect tool parts.

To ensure that the STIHL MS 180 oil pump delivers oil without difficulty, periodically check and clean the pump. Thus, the oil supply process will be normal.

The STIHL MS-180 carburetor is equipped with one idle adjustment screw. The full load jet is not adjustable, that is, it cannot be changed.

You need to know the basic rules for adjusting the idle speed:

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1) check the air filter, if necessary, change it;

2) check the spark arresting grille, if necessary, change or clean it. Then you can turn on the engine and then warm it up.

Country affairs Chainsaw Stihl 180 oil supply repair

Chainsaw STIHL MS 180 an indispensable tool for harvesting wood and other wood construction work. It is one of the most recognized gardening devices that comes with multifunctional features.

The tool weighs about 4 kg. The power reaches 1.5 kW and the busbar length is 35 cm.

Note that from a semi-professional device for this model of the saw got electronic ignition and a fairly fast chain tension. In addition, the STIHL MS 180 saw has 2 tanks for gasoline and for an oil mixture.

Reduced vibration is one of the main features.

This result is achieved thanks to 4 shock absorbers. It is no secret that high depreciation has a detrimental effect on human health, and Europe has been struggling with it for a long time.

It should be noted that it is not advisable to disassemble this saw on your own without special instruction, in this case it is better to entrust the device to the masters.

Chainsaw Stihl 180 oil supply repair

Chainsaw STIHL MS 180 an indispensable tool for harvesting wood and other wood construction work. It is one of the most recognized gardening devices that comes with multifunctional features.

The tool weighs about 4 kg. The power reaches 1.5 kW and the busbar length is 35 cm.

Note that from a semi-professional device for this model of the saw got electronic ignition and a fairly fast chain tension. In addition, the STIHL MS 180 saw has 2 tanks for gasoline and for an oil mixture.

Reduced vibration is one of the main features.

This result is achieved thanks to 4 shock absorbers. It is no secret that high depreciation has a detrimental effect on human health, and Europe has been struggling with it for a long time.

It should be noted that it is not advisable to disassemble this saw on your own without special instruction, in this case it is better to entrust the device to the masters.

What to fill with oil for chainsaw Stihl 180 (stihl 180)

  1. Spend some money on the original oil. Stihl HP 2-stroke oil costs a little more, but cleaning is even more expensive.
  2. High-quality fuel can also be poured into Mobile 1, and a three-phase one is suitable for lubrication, in no case do not fill the workings.
  3. From inexpensive options, mineral oil 15-40, in winter 10-30. You can M8, for example, or M10.

Remember your personal safety when working with your chainsaw.

Remember that the quality of the oil being poured affects the operation of the chainsaw. Poor quality oil can cause ineffective tool performance and adversely affect tool parts.

To ensure that the STIHL MS 180 oil pump delivers oil without difficulty, periodically check and clean the pump. Thus, the oil supply process will be normal.

STIHL MS 180 oil supply repair

The owners of this model of the tool should be prepared for the fact that they may be faced with such an unpleasant moment as a leak of oil to lubricate the chain. Oil can leak out while working with the tool and even when it just lies without action.

What is the reason for this phenomenon? The fact is that oil leaks due to leakage in the area where the hose from the oil tank and pump is connected.

In order to solve the STIHL MS 180 oil supply problem, it is advisable to disassemble the device.

Solution to the problem:

  1. Check the hose, if it is damaged, then replace it with another one. Or try to degrease the hose and rinse and put on a sealant, it should work.
  2. Check the filter oil for breakage, clean it (if you filled in the waste)
  3. There may also be a clogged zapune, which creates a vacuum in the fuel tank and affects the fuel supply. The problem may be in the adjustment of the carburetor and the channels may be clogged, well, or the air filter, you need to thoroughly clean the filter and carburetor channels.

In general, the problem is mainly due to poor oil.

It is not recommended to pour oil into a chainsaw that is not intended!

Construction and Summer Cottage in an understandable language Situations in which regulation is necessary

New chainsaws are supplied from the manufacturer with pre-adjusted carburetors. This is called standard adjustment. But for the normal running process, it is required to lower the maximum engine speed, adjust the carburetor. After running in, the chainsaw needs to be fine-tuned to maximize engine performance.

Also, a signal for cleaning and adjustment is an increased fuel consumption, which negatively affects the operation of the exhaust system. Simply put, the chainsaw begins to smoke heavily and the muffler becomes clogged with carbon deposits, which in turn will lead to a decrease in power. With a lack of fuel in the mixture, engine parts are poorly lubricated, and premature wear occurs. Also, a poor-quality mixture can cause the engine to jam due to overheating (this is one of the reasons why the chainsaw will not start).

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Adjustment is necessary when the engine does not idle, stalls, or does not develop full power.

How the carburetor is adjusted

The chainsaw setting algorithm is quite simple and consists of the following steps:

  1. Regulation of the engine for smooth operation at low rpm.
  2. Adjust the carburetor for the correct fuel mixture at maximum speed.
  3. Fine adjustment of the carburetor for idling.
  4. Chainsaw check in all modes.

Now let’s look at how the correct adjustment of the chainsaw carburetor goes in more detail. Almost all carburetor models have three adjusting screws. The screw (T) is responsible for fine tuning in idle mode. Screw (H) setting for maximum speed. The screw (L) controls the mixture formation at low rpm. By tightening the screws (L) and (H), the fuel supply and the mixture becomes leaner, respectively, the speed increases.

How to properly adjust the chainsaw carburetor

A chainsaw is a technically challenging tool that needs to be serviced from time to time. Cleaning, replacing filters and, of course, adjusting the carburetor of the chainsaw will help to serve its entire life. In this article, we will consider the issue of tuning the carburetor. How and why it is carried out.

Adjusting the carburetor of a Chinese chainsaw

The carburetors installed on the Chinese-made saws are made in the same way as in Europe and have the same adjustment screws.

The carburetor of a Chinese chainsaw is adjusted according to the algorithm presented above, and differs in that when initially adjusting the screws (L) and (H), they must be turned out two turns. Further, the carburetors of the Chinese saw are adjusted in the same way as the European ones.

Instruments

Correct adjustment of the chainsaw carburetor should be carried out using a special tachometer tool. It allows you to most accurately determine the maximum number of engine revolutions and adjust them according to the manufacturer’s requirements. You need a small slotted screwdriver for adjustment. For some models of chainsaws, you will need a special adjusting key, without which work cannot be carried out.

The key for adjusting some models of carburetors is available only in service centers authorized for the repair of chainsaws by the manufacturer. This measure is aimed at reducing breakdowns due to incorrect settings by inexperienced users and those who are engaged in repairs without official permission to do so.

Process description

If the carburetor of the chainsaw is not adjusted and it is not possible to start the chainsaw, then the adjustment begins by setting the screws (L) and (H) to the standard setting. This is 1/5 turn of the screws until they are fully tightened. After that, you need to start the engine, let it run a little and warm up. The next stage is setting the low speed mode. Optimum low-end performance can be achieved by adjusting the screw (L) and idle (T). To do this, first the screw (L) is tightened until the maximum engine speed is obtained, then it is released by 1/4, and the idle speed is normalized with the screw (T).

After adjusting the work at the bottom, the thrust and maximum engine speed are adjusted. To do this, slowly tighten the screw (H) and check the speed according to the readings of the electronic tachometer.

An important step is to check the saw in all operating modes after adjusting it, for this you need to let the chainsaw cool down, and then start it according to the cold tool start algorithm. If the saw starts up normally and idles smoothly, you need to check how it cuts. If in the process of checking deficiencies in the power of the chainsaw are found, then it is necessary to repeat the adjustment of the screw (H) by unscrewing it and checking the thrust in operation.

How to clean

In the event that the chainsaw stalls at idle speed, it is necessary to disassemble the part and clean it. First of all, this applies to cleaning the additional filter. This detail is a mesh. To get to it, you need:

  1. Remove the largest cover.
  2. Remove the membrane located under the cover.
  3. Clean the mesh in the recess. This must be done with extreme caution, since the mesh may fall out. Use copper wire for cleaning. Additionally, you need to rinse and blow through all channels. The last procedure is necessary if gasoline is not supplied to the carburetor.

Device and principle of operation

Before starting the adjustment, it is recommended to study the chainsaw carburetor device in advance. Most often, it does not depend on the model, the only exceptions are Chinese-made chainsaws. But you can always spy on the instructions.

It is important that the proportions are observed, otherwise there is a risk of engine failure, which may be manifested by excessive fuel consumption or a complete stop of the device.

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The main parts of a gasoline saw carburetor are:

  • The tube performs the function of air transfer, portioned supply is possible due to the presence of a damper;
  • Diffuser this part is located directly at the inlet through which fuel is supplied, capable of accelerating the air flow;
  • The sprayer is capable of injecting gasoline into the created air stream;
  • The float chamber is a cavity that serves to maintain the fuel at the same level, from which gasoline is fed through a nozzle to the sprayer.

The principle of operation of a chainsaw carburetor is simple. Its structure allows air to pass through the tube, while the speed can be controlled by a damper. After the tube is open, the float is activated. This causes the air to pass through the diffuser and mix with the fuel. Then this mixture moves into the cylinder. Due to the difference in pressure (in the chamber with the float, it is almost equal to atmospheric, and in the tube it is rarefied), the fuel is sucked into the tube, and the more it is, the more the speed of the chainsaw engine will be.

How to setup

Stihl 180 chainsaw carburetor adjustment is carried out in order to improve performance and fuel economy.

To adjust with your own hands you need:

  1. Clean the fuel system, including the tank, from residues of a mixture of gasoline and oil. Blow out the air duct and filters.
  2. The carburetor of the chainsaw is adjusted using bolts H, L and S. Bolt H controls the jet, provides maximum speed. The L bolt performs the same function but provides minimum RPM. The S screw is responsible for the accuracy of the idle speed. Perform this procedure with the engine off.
  3. You need to adjust the carburetor on the chainsaw by setting the corresponding angles of rotation of the first two bolts. Baseline values ​​can be set as follows. Turn the first two bolts slowly in a clockwise direction, after the stop go back two turns.
  4. Turn on the engine and adjust the ignition on the Stihl chainsaw and its carburetor finally. To do this, you need to find the highest idle speed by turning the bolt L in different directions. After this maximum is found, the bolt must be returned a quarter of a stroke. In the event that the chain starts to move, the engine must be stopped.
  5. Carry out a technical check. In particular, you need to determine the maximum number of revolutions, check the acceleration and stability of the engine at idle, as well as the compliance of these parameters with the base values ​​in the instructions. The quality of the mixture for testing should be the highest.

How to remove a carburetor from a chainsaw

Before adjusting, you need to remove it from the Stihl chainsaw. For this you need:

  1. Turn the latch to the left to remove the cover.
  2. Remove the filter by unscrewing the two nuts that hold it. For ease of operation, it is recommended to use special screwdrivers with suitable bits.
  3. Remove all rods, including the carburetor lever.
  4. Remove the carburetor and then disconnect the fuel hose.

It is recommended to memorize the location of the parts so that you can then put the carburetor in place and at the same time there are no extra fasteners or distortions and cracks.

Malfunctions and repairs

The carburetor of the Stihl 180 chainsaw requires both initial and periodic adjustment. You can find out about its need by the following signs:

  1. Engine problems such as not starting or stalling immediately after starting work. The most common reason is the use of a poor-quality fuel mixture.
  2. Fuel consumption and increased emissions. Exhaust gases increase due to incomplete combustion of the fuel. Most often, this problem can arise due to oversaturation of fuel.

Other breakdowns may also occur, such as clogging due to damaged air filter or scale formation. The reasons may be related to the fact that gasoline remains in the fuel tank during a long idle period. This is due to the fact that the fuel is exhaled, which spoils the device.

Regardless of the reason, carburetor repair will be required, which most often comes down to adjustment. The method for performing this procedure depends on the model of the chainsaw, but general principles can be followed.

What you need to know about adjusting the carburetor of the Stihl chainsaw (Stihl)

You can’t do without a chainsaw in your household. Therefore, you need to know the rules of use and maintenance. This primarily concerns the performance of the carburetor. The efficiency of the chainsaw depends on this detail. Therefore, the Stihl chainsaw carburetor must be adjusted in time in compliance with the technology. If you have knowledge and little experience, you can do it yourself.