How To Clean A Carburetor On A Stihl 180 Chainsaw


In conclusion, I would like to reiterate that the Stihl carburettors, which are manufactured by its subsidiary Zama, are very reliable. With proper operation and storage, they are able to serve the entire period allotted to the chainsaw without repair.

Adjusting the Stihl 180 Carburetor

Home »Adjusting the Stihl 180 Carburetor

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, open.

How To Clean A Carburetor On A Stihl 180 Chainsaw

Adjusting the Stihl 180 carburetor

The carburetor of the Stihl 180 chainsaw, indiscriminately, can only be adjusted by the number of idle revolutions. It is impossible to increase or decrease the fuel supply in different modes using special screws. The manufacturer restricts access to adjustments and does not install these screws. How to adjust the carburetor to the correct idle speed is described in great detail in the manufacturer’s instructions.

In the event of certain malfunctions, and with experience, you can increase or decrease the fuel supply by increasing the clearance when opening the needle valve.

To increase the flow, the rocker arm of the needle valve in the distribution chamber must be bent up, and to decrease, down. This regulates the stroke of the needle and, accordingly, the throughput of the valve.

Chainsaw Stihl 180. Device and carburetor adjustment

The stihl ms 180 chainsaws are designed in such a way as to make their operation as easy as possible for inexperienced users. To this end, some of the settings available on the more powerful Stihl models were abolished in the saw carburetor. But there is still an opportunity to configure, and repairs, as well as adjusting the carburetor of the Stihl 180 chainsaw with your own hands, is possible.

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The Stihl 180 chainsaw is a versatile garden tool that is widely used in the garden. So, it is used for cutting firewood, pruning trees and other greenish plantings.

The Stihl 180 chainsaw is not the least popular both in construction and in farming. She is very comfortable and simple to use. It also has a low price, which makes it more affordable for the population.

Unfortunately, no matter how high-quality the tool is, it breaks at some point. The prerequisite for this is that you are more likely to like wear or destruction of parts at the end of frequent use.

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There is an option to remove some faults with your own hands. In order to repair a chainsaw on your own, you should know the structure of the tool, as well as more frequent breakdowns and methods for their elimination.

Often in the Stihl 180 chainsaw, the oil system is damaged. Find such a malfunction, of course, by the dryness of the working circuit or the presence of a leak.

The solution to this difficulty must be started with a painstaking examination of the hose that supplies the oil. The connection of the hose with the fittings is also amenable to inspection.

During the inspection and repair of the oil complex of accounting programs, it is also necessary to clean the filter. Often its contamination leads to poor oil flow.

If there is an oil leak, then this means that the density in the system is disturbed. First, this concerns the hose and oil channels. In most cases, such malfunctions appear in the course of mechanical damage to parts of the accounting software complex.

The process of removing and cleaning the air filter

Step by step instructions for disassembly

The carburetor device of models of different brands is almost the same, so take the Partner chainsaw as an example. We carefully remove each element and put it in order, so that later it would be easier to assemble.

Chainsaw carburetors from different manufacturers, if they differ, it does not matter

The top cover is removed by loosening three screws. Followed by foam rubber, an integral part of the 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 points to the drive rod

Next, remove the tip of the cable.

The arrow shows the end of the cable to be removed.

On the left from the fitting we pull off the gasoline hose.

We also carefully remove the gasoline hose indicated by the arrow

We finally disconnect the carburetor, it is ready for adjustment. Its mechanism is rather complicated, therefore, if further disassembly of the carburetor is required, the elements should be removed very carefully. They are small, so they can be lost.

The carburetor consists of many small parts, which should be laid out in order during disassembly.


The cause of a motor malfunction, especially if it functions normally at low speeds and stalls under loads, is the plugging of the spark arrester of the muffler with combustion products, which prevents normal exhaust. In this case, do-it-yourself Husqvarna chainsaw repair consists of removing the muffler, if it is collapsible, then disassembling it, and wet cleaning the unit from carbon deposits using a detergent.

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After washing, dry the non-separable muffler with a hairdryer. Remember that soot contains substances that are carcinogenic, and dry cleaning, after which they may be inhaled, is not acceptable. When removing the muffler, plug the engine outlet with a clean cloth.

The muffler can become clogged for the following reasons: due to the use of a fuel mixture with a large amount of oil (the oil level is recommended by the manufacturers), the use of low-quality oil or oil, which is not intended for two-stroke engines.

Electrical equipment, light, lighting

With all the desire, the chainsaw cannot be classified as a complex device. over, the simplicity of the design is its hallmark. Chainsaw repairs, however, can be time-consuming. The difficulty lies not directly in the repair of the chainsaw with your own hands, but in the accurate diagnosis of the malfunction. One sign of inoperability can be due to many reasons. Therefore, before disassembling the engine or carburetor, it is necessary to thoroughly analyze the symptoms of the malfunction. No instructions for repairing a chainsaw on your own can replace simple logic.

Ignition system

Almost all types of engine problems listed above can be caused by ignition system failures. If they occur, it is recommended to start troubleshooting with a candle. This is justified by the fact that its condition will also provide useful information about the functioning of the fuel system. If a problem occurs, remove the plug and inspect it.

When the spark plug is dry, then most likely the problem is not in the ignition system, but in the failure of the fuel mixture to enter the cylinder. You can wrap the spark plug back and grab the fuel system. When the spark plug is splashed with a fuel mixture, there is an excess of it. This can be caused by a misalignment of the carburetor or a violation of the starting rules. The spark plug must be wiped and dried by draining the cylinder, then shut off the fuel supply and operate the starter to remove excess fuel. Then replace the plug and start again.

Perhaps, in your case, the ratio between gasoline and oil in the mixture is broken, the carburetor is not adjusted, or low-quality oil is used. Rinse the candle in gasoline, clean the carbon deposits with a needle or an awl, clean the electrodes with a fine sandpaper and reinstall. Even when repairing a Goodluck chainsaw with your own hands, which consists in checking the spark plug, there is good reason to believe that the faults are in the fuel system, you need to check the spark plug for the presence of a spark.

If there is no spark, you simply need to replace the spark plug. The reasons for the absence of a spark can also be hidden in a failed ignition module or in violations of the gap between the flywheel magnetic circuit and it. The distance should be 0.2 millimeters. A gap violation is especially likely if, before that, you disassembled the saw with the ignition module and flywheel removed. The gap must be set using a gasket that is 0.2 mm thick placed between the ignition module and the flywheel boss. Defective ignition module must be replaced.

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Chainsaw malfunctions

All chainsaw breakdowns are conditionally divided into two groups: engine malfunctions with all its systems and components (fuel supply system, ignition, exhaust system, cylinder-piston group) and malfunctions of other components (lubrication system, clutch, tire, chain brake).

Violations in the functioning of chainsaw engines occur quite often, it is their correction and detection that takes users most of the time. They boil down mainly to the following manifestations: the engine does not start, the engine starts, but it stalls or does not work at all, the engine does not develop power, that is, it works normally at idle, but stalls under load.

When repairing a Stihl chainsaw with your own hands, you must act by the method of exclusion. One by one, check all possible causes of breakdown, starting with those that will take less time to diagnose and eliminate.

Chainsaw fine tuning

The exact adjustment to which the carburetor of the Ural chainsaw is subjected should be carried out only in a heated state, preferably by specialists with the necessary equipment. The order of adjusting the screws is as follows: first screw L, then H and finally the idle screw T.

First, the highest idle speed is determined. To do this, screw L is slowly turned and after the position of the highest revolutions is found, the screw is turned by ¼ of a turn against the clock.

The H screw affects the power and speed that the carburetor of the Stihl chainsaw has. It is necessary to warm up the engine at full speed for 10 seconds, turn the screw ¼ of a turn against the clock. Let the engine run, and then check the maximum rpm with a tachometer.

Fine adjustment of the T screw is carried out with the engine running, the screw is turned clockwise until the saw chain starts rotating. Then the screw T must be turned in the opposite direction until the chain stops.

To adjust the imported husqvarna chainsaw carburetor, it is best to contact a specialist who can correctly adjust all the necessary parameters using a tachometer.