Stihl 180 Clutch Assembly

DIY repair of the Stihl 180 chainsaw”: instruction

The Stihl 180 chainsaw has proven itself well in the construction market. This portable device has a power of 1400 W and a motor volume of 31 cc. Cm. The length of the saw chain is 350 mm, at idle speed it makes more than 2 thousand revolutions. Its popularity among consumers is also explained by the acceptable cost of the tool. However, when using a chainsaw, malfunctions occur from time to time. In the service, repairing a tool is not cheap, so someone who understands at least a little technical issues fixes breakdowns with their own hands.

Expert advice

When repairing a carburetor, you must remember that this is a complex assembly, consisting of rings and many parts. This means that cleaning and repairs must be carried out with utmost care. If the tool stalls or does not start, the spark plugs must be checked in addition to the carburetor. If they are faulty, they are rolled up and dried.

Additional fuel can be drained through a special opening. Malfunctions of the Calm 180 chainsaw and their elimination are partially described in the instructions. After reading the article, you can understand that the candles must be dried for at least half an hour, after which the candle can be installed in place, started the device.

Starting and ignition mechanism problems

The cause of problems with a chainsaw of this model may be the inoperability of the ignition system and the engine start unit.

Stihl 180 Clutch Assembly

General view of the ignition of a chainsaw 180

If no deviations are found when measuring the gap between the flywheel and the module, it is necessary to Pay attention to the spark plug.

Stihl 180 chainsaw starter assy

Having dismantled the candle from the shaft, we measure the gap of the chainsaw candle between the central and side electrodes. If it is excessive (more than 0.7-1.5 mm), a spark may occur periodically, and if it is minimal (less than 0.7 mm). Insufficient for optimal ignition of the fuel mixture.

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If gasoline enters the combustion chamber, and the inconsistency in the ignition system has not been identified, the carburetor may become a likely cause of failure. This unit is designed to mix fuel with air and supply them to the cylinder. After dismantling the carburetor, it cleans its channels and jets using universal means.

It must be remembered that the carburetor consists of many small parts, and then its dismantling, disassembly and cleaning require special care.

After diagnosing the ignition system of the Stihl 180 chainsaw and its restoration, we proceed to troubleshooting in the power unit, namely in the cylinder-piston group of the saw.

Carburetor breakage

Determination of malfunctions and repair of the carburetor of the Stihl 180 chainsaw can be done by hand. The carburetor malfunction is associated with the electric motor. This manifests itself in the inability of the saw to gain high speed or in its spontaneous stop.

Most often, this situation occurs due to a stuck valve in the nozzle of the unit. To check the nozzle, you will need to remove the carburetor and blow it out of debris. The principle of the valve is based on the passage of air in only one direction. If it is blown in both directions, you will have to replace it.

Another prerequisite for stopping the chainsaw at increased speeds may be violations in the air leak. If there are suspicions of depressurization of the suction unit, then the easiest way is to replace the gaskets. When replacing gaskets, pay attention to the condition of the needle bearing, the defects of which lead to the valve not allowing the fuel mixture to pass through. A piston with a spring can also be “guilty” of improper suction, they are also visually inspected for wear and, if necessary, changed.

The main types of breakdowns and methods of their elimination

Before starting work on diagnosing faults and eliminating them, it is necessary to prepare the necessary tools.

General view of the Stihl MS 180 chainsaw with the main units

Due to the fact that the chainsaw is a simple unit, the list of accessories includes the following items:

  • A set of flat and Phillips screwdrivers;
  • Open-end locksmith keys;
  • Candle wrench;
  • Socket set with screwdriver
  • Stihl Multifunctional Tool.
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Stihl Multifunctional Tool

In order to qualitatively eliminate the resulting breakdowns and restore operational characteristics, it is necessary to establish as accurately as possible the malfunction preceding the failure of the unit. Following from the fact that the chainsaw is equipped with an internal combustion engine (ICE), the main causes of breakdowns should be primarily looked for in the power unit.

Before starting work, it is necessary to turn off the engine, let it cool down and exclude the possible start of the chainsaw. It is recommended to wear cotton gloves to protect your fingers.

The most common faults when repairing a Stihl 180 chainsaw include:

  • The engine does NOT start;
  • The operation of the motor is intermittent, with a short operation of the chainsaw spontaneously stalls;
  • Oil leaks near the chain lubrication mechanism;
  • Engine does NOT develop full power.

Frequent breakdowns of the transmission part of the saw include rupture of chain links. You can independently restore its integrity by riveting links or replacing with a new one.

Despite the relative simplicity of the design and the absence of complex mechanisms, experts recommend troubleshooting in a specific order. First of all, the presence of a mixture in the fuel tank is checked, and if everything is in order with the liquid level, it is necessary to proceed to inspecting the chainsaw starting unit. If this mechanism is also in good condition, you need to check the spark plug performance.

After the performed manipulations to diagnose the spark plug (determining the presence or absence of carbon deposits, the correct gap between the electrodes, the state of the sealing ring), we turn our attention to the carburetor. Fine sawdust, dust and soil particles often clog the fuel system.

If cleaning the carburetor of the stihl 180 chainsaw did not help to restore the previous performance of the unit, the reason for sure lies in the cylinder-piston group (CPG). The power unit belongs to the most complex mechanism of the tool, the diagnosis of which requires almost complete disassembly.

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Types of breakdowns

Before starting work on Finding the malfunction of the Stihl 180 chainsaw, it is necessary to prepare the tools and allow the engine to cool down, thus excluding unintentional start.

For a qualitative elimination of a breakdown, it is necessary to analyze what actions preceded its appearance. If we assume that the chainsaw is equipped with an electric motor, the main breakdowns are primarily associated with it. The most common malfunctions include:

  • Inability to start the engine;
  • Self-disconnection of the device during operation;
  • The electric motor does NOT pick up the required speed during operation;
  • The appearance of extraneous noise and a burning smell;
  • Oil leak.

Common breakdowns of chainsaw consumables include chain breakage, which always occurs between its links. When connecting the links to rivets, you will need to firmly press their side parts and flare them. If the protrusions are worn off, then rivet them will not work, so contact welding will be needed.

In addition to breaking the chain, it can also stretch. This happens when using a low-quality chain or in case of its frequent overheating, as well as wear of the driven sprocket. Overheating is associated with a disruption in the oil supply caused by blockage of the injection. To eliminate the malfunction, you will need to purge the oil supply system. In the event of stretching, the chainsaw jerks. To restore normal operation, you can try to remove the equal link, while it should be borne in mind that riveting the links is not so easy.

When searching for breakdowns in the device, it is recommended to follow the following sequence of actions:

  • Examine the general condition of the device;
  • Check the mixture level in the fuel tank;
  • Inspect the unit responsible for starting the saw;
  • Diagnose the performance of the spark plug and the condition of the sealing ring;
  • Rate carburetor.

Some types of malfunctions can be eliminated by simple actions such as cleaning the components. But malfunctions associated with the carburetor or ignition system require a complete or partial disassembly of the saw.

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