Replacing The Piston On The Stihl 180 Chainsaw

We examined the main causes and malfunctions of the Stihl ms 180 chainsaw in which it is necessary to replace the CPG. But, as a rule, in each specific case, the reasons can overlap, and for proper repair, an integrated approach to solving the problem is required. Putting a new reciprocating saw on the saw does not always mean solving the problem. It is imperative to eliminate the causes of the malfunction and the tool will serve for a long time without problems and the need for repair.

The main malfunctions of the Stihl ms 180 chainsaw are associated with the piston group. Let us see the main prerequisites for changing the piston. Let’s give a description piston and the method of its substitution.

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Replacing Stihl 180 rings

The main malfunctions of the Stihl ms 180 chainsaw are associated with the piston group. Consider the main reasons why the piston must be replaced. We give a description of the piston and the algorithm for its replacement.

Chainsaw cylinder-piston group malfunctions

Sometimes the engine of the tool does not start or works with obvious interruptions and without reaching the rated and maximum power due to a malfunction of the cylinder-piston group. In this case, do-it-yourself chainsaw repairs are performed in the following sequence.

4 bolts are loosened on the cylinder head, after which the cylinder is removed from the block. The piston is carefully checked for chips, scratches, scoring. In this way, the sprocket is also replaced in the Stihl 180 chainsaw body in place. Their presence is unacceptable and entails replacement of the piston. At the same time, there should not be the slightest mechanical damage on the cylinder itself. Buy the stihl ms 180 chiansaw in the characteristics of the Stihl 180 chiansaw, device. It can either be repaired by boring a mirror to fit the piston oversize, or replaced with a new one assembled with a piston.

Of great importance for ensuring optimal pressure in the combustion chamber is the absence of signs of wear on the piston housing and piston rings. The normal functioning of the chainsaw engine largely depends on this.

It is possible to find out the degree of wear of the parts only after removing the piston group from the engine. The rings themselves should be tight enough and at the same time sit freely on the piston. The presence or absence of wear on the piston and rings can be verified experimentally. To do this, the piston inserted into the cylinder should be shaken slightly in different directions. Excessive piston free travel is most likely indicative of wear.

To eliminate this defect, either the cylinder is bored and the repair parts are installed, or the entire CPG set is changed. Otherwise, the chainsaw will not develop the required power.

How to repair a Stihl chainsaw with your own hands

  • Main types and diagnostics of defects, tools for their elimination
  • Malfunction of the fuel supply system
  • Elimination of defects in the trigger
  • Chainsaw cylinder-piston group malfunctions
  • Malfunctions in the lubrication system and their elimination

With all the variety of modern building materials, the tree species remains very vital. Therefore, woodcutters, workers of landscaping services, summer residents are interested in tools for woodworking, including chainsaws.

The Stihl chainsaw is easy to operate, inexpensive in cost, reliable, has a long service life.

Different people prefer different brands. Anyone interested in a Partner chainsaw, someone a Stihl brand device, someone else. But they all break down periodically, while their breakdowns are both similar and different. Next, let’s see the repair of the Stihl chainsaw with our own hands.

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This brand is well known both among experts and among personalities who are engaged in arranging their own living space. The great popularity of the Stihl chainsaw determines the frequent practical use of this tool and forces us to find methods of effective dealing with its usual breakdowns.

It should be noted that the presence of traces of a certain characteristic in the place of spark formation speaks very sweetly about the sources of the disease of the entire starting system. Such source, namely, can be a carburetor. So, the complete absence of any signs of fuel on the candle (its complete dryness) most likely indicates that the fuel did not pass into the combustion chamber due to the complete clogging of the carburetor.

If the gasoline is fixed on the chainsaw candle, and the cutting device itself does not work normally, then this means an excess of air-fuel mixture. The reason for this condition, perhaps, is a malfunction in the carburetor adjustments, clogging of its nozzles, as well as improper start of the mechanism. In the case of fixing a characteristic carbon deposit on the candle, one can talk with sufficient confidence about the improper functioning of the carburetor or the use of low quality gasoline.

With all the above signs reflected on the spark plug, it is necessary to remove the carburetor and check its technical condition. Stihl 180 chainsaw repair clogged air filter. Checking the breather and cleaning it. Chainsaw stihl ms 180-16. Replacing the review of the Stihl 180 chainsaw. Piston rings in size. If a blockage is found, the carburetor should be thoroughly cleaned, then the device should be adjusted according to the technological requirements and the gasoline used in the tank should be replaced. It should always be remembered that a carburetor is a rather complex assembly, consisting of many small components, parts and channels. Therefore, its repair must be carried out with extreme care and accuracy.

In addition to restoring the carburetor, it is necessary to check the performance of the spark plug itself at the stand and, if necessary, set the correct gap in it. If you don’t like the candle and its work at all, it is recommended to replace it with a new candle.

Replacing the piston group on the Stihl MS180 chainsaw

In this we will show you how to replace the piston group on the Stihl MS180 chainsaw, crankshaft oil seals.

Oil leakage for chain lubrication

Sooner or later, every tool owner will face this problem. The cause of this malfunction is a leak in the connection between the oil pump and the hose from the oil tank.

To eliminate this problem, completely dismantle the chain saw.

  • If the hose is damaged, it is best to replace it with a new one. You can try filling it with sealant, degreasing it and rinsing it.
  • Oil may leak if the saw oil filter is clogged or broken. It should be checked, cleaned or replaced.

Removing the handle

Direct disassembly of the Stihl 180 begins with removing the handle, which is attached to the body of the chainsaw using three rubber shock absorbers. To remove, it is necessary to remove the plastic plugs from the inner cavity of the shock absorbers, then, using a powerful screwdriver, first squeeze out the upper shock absorber, then the one closer to the rear handle.

When the handle remains on one shock absorber, it is necessary to unscrew the body of the chainsaw from the inside of the handle and bend it to the side, remove the body from the last rubber band.

Assembling the Stihl 180 chainsaw

Assembling the stihl ms 180 saw back is quite simple, the main thing is to adhere to the following algorithm:

  • Install the piston on the connecting rod, the arrow on the piston should point in the direction of the Stihl 180 chainsaw, and the side of the crankshaft, which is intended for installing the flywheel, is located to the left of the piston;
  • Carefully insert the piston back into the cylinder, the place for mounting the coil should be on the side where the flywheel is installed on the crankshaft;
  • Install the bearings, oil seals, circlip on the shaft and lower the entire assembly into the seat in the cylinder;
  • Next, degrease the crankcase installation site and the crankcase itself, then grease with sealant and, setting in place, tighten the 4 fastening screws;
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To reassemble the Stihl 180 saw after the engine is assembled, the reverse sequence of disassembly must be followed. It is important to treat the process carefully and do not forget to install the rods on the carburetor, and connect the ignition wire.

Below you can see the disassembly of Stihl 180 on, it is made for inexperienced users, it shows the whole process in detail.

Dismantling the Stihl 180 chainsaw and assembling it, with some experience, is quite simple, the main thing is to thoroughly clean the saw before work and not rush. In order that small parts are not lost, you need to use containers in which, in the process, you should lay out the parts.

Doesn’t start

If the chainsaw does not start, then the cause may be a breakdown of the ignition and engine start unit. If, when measuring the gap between the module and the flywheel, no deviations are found, then the spark plug should be checked. It is pulled out of the shaft and the gap is measured. If fuel enters the combustion chamber, and there are no breakdowns in the ignition system, then the carburetor is faulty.

Repair and replacement of the oil pump

Consider how to change the oil pump. If the element leaks, the gasket between the two parts should be renewed. If this part of the oil pump is not damaged, then it must be wiped and put back. Now they check the hose. There should be no cracks on it. If the hose is damaged, replace it. Then the outlet channels are cleaned with a compressor.

Replacing filters on the Stihl 180 chainsaw

On you can see the detailed instructions, in which the master showed in all details how to properly disassemble the saw and install a new piston on it. You can also see how the saw is cleaned correctly during the repair process.

When a piston needs to be replaced

There can be quite a few reasons why the piston needs to be replaced, as well as a completely piston one, but they can all be divided into natural ones and those arising from improper operation. Natural, this is the wear resulting from the long-term operation of the Stihl 180 chainsaw. There are much more artificial ones, for example:

  • Overheating of the engine and the appearance of thermal seizures;
  • Foreign body entering the cylinder and the appearance of mechanical scoring;
  • Breakage of the piston ring as a result of exceeding the maximum engine speed;
  • Breakage of the piston skirt due to overspeed;
  • The use of low-quality fuel, as a result of which the piston group of the chainsaw wears out from the side of the intake channel in the cylinder;
  • Stihl chainsaw operation with a dirty fuel filter, as a result of which the percentage of oil in the fuel mixture decreases;

It is necessary to diagnose the CPG if the Stihl ms 180 has suddenly lost power or does not start, while the starter of the tool does not turn. If the starter cranks, but the saw does not start, while there is a spark and the fuel enters the cylinder correctly, it is necessary to measure the compression in the engine.

9.5 11 atm. It is considered a normal indicator at which the Stihl chainsaw starts up properly and produces maximum power, if the compression is lower, there is a possibility that there are scuffs on the cylinder-piston group, or its wear is quite large. In any case, with reduced compression, for further diagnostics, it is necessary to completely disassemble the saw.

It is possible to determine the presence of seizures on the piston, as well as the breakage of the piston ring, if you remove the muffler and conduct a visual inspection of the visible part of the piston, while the rings can be checked for elasticity by pressing them with a small screwdriver. There will be slight movement on the working rings, a defective or jammed piston ring will not move.

How to change the piston on the Stihl 180 chainsaw

If you need to replace the old piston and install a new one, you need to know how to do this correctly and follow a certain algorithm of actions. You also need a small slotted screwdriver, a special Stihl combination wrench, a power screwdriver, a hammer, a soft material drift, a compressor and a Stihl piston stopper.

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When starting work on replacing the piston or piston group assembly, the chainsaw must be cleaned of dirt as efficiently as possible. Further, the work is carried out according to the following algorithm:

  • The top cover is removed from the saw and the spark plug is unscrewed.
  • Side cover is removed.
  • Using a power screwdriver, the stoppers are removed from the shock absorbers of the chainsaw, after which its handle is disconnected from the body.
  • Next, you need to remove the drive sprocket and starter.
  • Install the piston stopper in the spark plug hole and unscrew the flywheel nut and clutch.
  • Remove the flywheel, clutch and oil pump worm gear mechanism, which is located behind the clutch.
  • Loosen the two screws securing the carburetor and air filter. Remove the filter, engine control lever and Stihl carburetor.
  • Remove ignition coil and muffler.
Replacing The Piston On The Stihl 180 Chainsaw

After all these operations have been carried out, it is necessary to clean the saw from dirt again, then turn it upside down and unscrew the four screws securing the engine to the chainsaw body. By unscrewing the screws, the motor is separated from the housing and is cleaned again.

On the removed engine, the pallet is untwisted and removed, after which the piston assembly with the crankshaft is removed from the engine.

Next, using a small screwdriver, the piston pin retaining rings are removed, and the crankshaft is disconnected from the piston.

In the case when it is necessary to replace only the piston, you can install it on the crankshaft, then mount the piston pin circlips, while positioning them so that the snap ring break point is directed downward. This is necessary in order to exclude the possibility of spontaneous popping out of the circlip during engine operation (according to the manufacturer’s instructions Stihl). After that, the compression rings are installed, the cylinder is lubricated with engine oil and the engine is assembled.

The crankcase is installed on the engine, a sealant is used as a gasket, after which four fastening screws are mounted and tightened crosswise. Further, the engine is installed on the body of the chainsaw. Subsequent assembly is performed according to the reverse disassembly algorithm.

Why the Stihl chainsaw won’t start after replacing the piston

If the saw does not start after replacing the piston, it is necessary to check the fuel supply to the chamber, as well as diagnose the ignition system. Very often, when installing the control lever on the chainsaw, the craftsmen forget to connect the wires coming from the ignition coil, as a result of which the spark disappears and the saw does not start.

Also, the problem may lie in a pinched fuel supply hose or if it is not connected at all. Of course, there can be many reasons, but it is worth remembering that if all the work on replacing the piston is carried out correctly, the tool should start without any problems and work normally.

Description of the piston group of the Stihl 180 chainsaw

On the Stihl 180 chainsaw, the piston group has a diameter of 38 mm. The dimension of the chainsaw’s CPG is determined by the piston diameter, the cylinder is slightly larger. As standard, the MS 180 CPG is supplied complete with a piston pin, two piston rings and two retaining.

A distinctive feature of the CPG on the Stihl MC 180 is that it has two compression rings, while almost all of its main competitors have only one. According to the manufacturer, the installation of a pair of rings makes it possible to better stabilize the piston in operation, enhance its cooling and increase the compression in the engine, thereby improving starting.

How to change the piston on the Stihl 180 chainsaw

The main malfunctions of the Stihl ms 180 chainsaw are associated with the piston group. Consider the main reasons why the piston must be replaced. We give a description of the piston and the algorithm for its replacement.