STIHL 180 chain saw repair: Troubleshooting

Alpina façade paints can be used on almost any substrate:

  • Concrete.
  • The brick facing and usual (clay, silicate, etc.).д.).
  • All types of plasters (cement, lime, textured mixtures).
  • Old dispersion coating.
  • Dispersion putties.

Freshly applied lime-cement plasters are recommended to stand for 4 weeks to remove carbon dioxide from them and complete chemical reactions.

Highly absorbent surfaces (porous or cellular materials, gas concrete, etc.).п.) should be pre-primed with appropriate primers with antiseptic properties.

If gypsum plasterboard is used, there is no need for primer.

STIHL chain saw STIHL self starter repair

In detail: STIHL chain saw STIHL starter repair with his own hands from the real master for the site

To quickly start any chainsaw requires a starter. At accelerated cranking of the crankshaft of the tool the fuel-air mixture fed into the engine is compressed and its subsequent ignition. That’s why the chain saw starter is able to work properly, and that’s why it plays a key role in the chain saw’s functionality.

Almost all leading chainsaw manufacturers equip their products with starters of similar working principle. It is no coincidence that in specialized stores there are universal designs of starters, which are equally suitable for STIHL chain saws, Husqvarna, Makita, and for the Chinese semi-official imitations of these brands. Only chainsaw starters of domestic production (Lesnik, Ural and others) have some peculiarities.

The principle of operation of the chain saw starter is as follows. In the housing slot there is a handle, through which a cable is passed. If you lift the handle sharply, the cable pulls out and engages the clutch drum of the ratchet mechanism, which transmits motion to the drum with slots provided on the shaft. In this case, the crankshaft makes several revolutions, and the working mixture in the space between the piston and the cylinder head is compressed. Accordingly, when the handle is lowered the contact between the ratchet and the splines is lost and the shaft stops.

As the engine displacement increases, the quantity of fuel-air mixture required for ignition increases and so the number of pulls on the starter rope for high-powered saws also increases. Therefore, in order to speed up the ram return, the servo springs, made of steel with high elastic properties, are used.

The chainsaw can be started easier by the following methods:

  • by pre-enrichment of the mixture, for which the carburettor has a special slide valve.
  • An automatic decompression valve can be installed to reduce the working pressure in the chainsaw cylinder.
  • installation of an additional spring that makes it easier to unwind the crankshaft while moving the cable.
  • Some chain saws (e.g. Partner S-series, Maxcut, etc.) have a primer to change the throttle cable.) The primer is a pump that pumps up the fuel.

With frequent chain saw starts some of the starter components are permanently subjected to dynamic loads. As a result the cable could break, some teeth of the ratchet could get chipped, and the shaft could rotate at a slower rate. Therefore, revision and even repair of the starter are operations that are sometimes carried out several times per season.

When pulling it, the cable is constantly rubbing against the starter housing. To replace the body of the assembly, and carefully lift the ratchet drum so as not to allow the return spring to come off its sockets. It is best to do this job with two people: one of them fixes the spring while you change the rope. After the cable is fastened in the handle and in the grooves of the drum, the cable is wound around the roller and the body is assembled.

If the starter spring material was bad quality, the spring will break (usually in the place of its connection to the drum, where it forms a loop). It is not necessary to replace the spring in this case. It is enough to thoroughly clean its surface from dirt and traces of grease, carefully grind the place of destruction, then temper the spring at 600 650 ° C (steel spring should turn crimson). It is necessary to cool down the spring slowly, and at 100 150ºС already it is possible to wrap its end accurately in the shape of a limiting ledge on the internal surface of the drum (steel will gain necessary plasticity) and to insert it into place. The elastic properties of the spring will not change.

Placing the starter spring into the right groove is not an easy thing, even for an experienced user. First twist the spring to its former diameter and install it in the hub cavity of the drum. The outer end of the spring is fixed by the limiting tab, and the outer end, using a screwdriver, should be placed against the hole in the lock. The hinge at the inner end of the spring is aligned with the hole with a screwdriver, and then the disk is lowered. By rotating the disk, check whether the ratchet mechanism dog is in place. Then you assemble the ratchet itself.

After installing the spring, it is necessary to adjust its tension. To do this, a cable is inserted into a groove on the circumference, and a return spring is wound around it. After elimination of slackness, it is better to screw the spring on by additional turns to guarantee the necessary tension of a part.

Repair of the ratchet mechanism itself at home is not recommended, because many operations will require the use of a CNC machine. It is easier to buy a new assembly in specialized stores.

Today we will look at problems with chain saw starter motor and fix them. This type of failure is not uncommon in intensive use of a chainsaw. And in our case on the logging site, it happens systematically.

Disassembling handle

To disassemble the STIHL 180 you must first remove the handle which is fixed to the handlebar by three rubber buffers. To remove it, you must remove the plastic plugs from the inside cavity of the shock absorbers, then using a strong screwdriver, first press out the upper shock absorber, then the one closest to the rear handle.

The throttle trigger is located at the rear of the handle and is connected to the carburetor by a wire tie. In order to disconnect the cable from the throttle trigger, you must loosen two screws and disassemble the handle.

When the handle remains on one shock absorber, it is necessary to unscrew the body of the chainsaw from the inner part of the handle and, breaking it aside, remove the body from the last rubber.

Assembling the STIHL ms 180 chainsaw

Reassembling the STIHL ms 180 saw is easy enough, the main thing is to adhere to the following algorithm:

  • To install the piston on the connecting rod, the arrow on the piston must face the STIHL 180 and on the left side of the piston is the crankshaft side where the flywheel is located;
  • Carefully insert the piston back into the cylinder, the place for mounting the coil should be on the side where the flywheel is mounted on the crankshaft;
  • Install bearings, oil seals, and shaft retaining ring, and lower the entire assembly into the cylinder seats;
  • Next, degrease the crankcase mounting area and the crankcase itself, then lubricate with sealant and install the 4 mounting screws in place;

To reassemble the STIHL 180 after you have assembled the engine, follow the reverse order of disassembly

It is important to treat the process carefully and do not forget to install the rods on the carburetor, and connect the ignition wire

You can watch the STIHL 180 disassembly video below, it is made for inexperienced users, it shows the whole process in detail.

STIHL 180 chain saw disassembly and reassembly is quite simple if you have some experience, the main thing is to clean the saw well and not to rush it before the work. To keep small parts from getting lost, you need to use containers in which you can place the parts in the process.

Removing the flywheel

The flywheel chain saw STIHL 180 is screwed with a lot of force, so to remove it you need a head with a metal screwdriver. The nut holding the flywheel, unscrewed with a 13 head.

To block the crankshaft from turning, you must unscrew the plug and through the spark plug hole install a piston stopper, if it is not available, you can use an old cord from the starter, with knots tied to it and immersed in the cylinder through the spark plug hole.

remove, starter, motor, stihl

Strictly prohibited to keep the flywheel from turning by installing between the ribs and the body of the power screwdriver, and other tools, with this method of blocking the rotation, the flywheel blades can not withstand the load and break.

Once the piston in the cylinder is locked, you can unscrew the flywheel nut. The threads in the nut are common, so you have to turn it to the left side. After loosening the nut, remove it until the end, just unscrew until its top edge flattens with the tip of the shaft, and then the mallet of soft metal is installed on the nut and make a sharp blow on it. Thus, the flywheel from a sharp blow off the shaft and it can be easily removed without the help of additional tools.

Faults and repair of the carburetor chainsaw

All carburetors are cleaned the same way, the main thing is not to be afraid and do not lose anything. The repair will require preparation:

First of all, using a brush, dirt and dust is cleaned. Then the cover and the filter are removed. Unscrew the two nuts of the air filter, and remove the body of the air collector. Now you can see the carburetor and the “choke” and gas pedal rods. After putting the choke with your finger down, you will have to remove the gas pedal lever.

To move the carburettor off the seat first remove the choke lever and close it completely. Now you need to remove and pull the engine stop wire. It is also necessary to remove the plastic lever, to which the wire is attached. On the right side it is in the hole and on the left side you can lift it.

The carburetor is free and can be pulled out and cleaned. The best way to do this is with a compressor, but if it is not available, the parts can be washed in clean gasoline.

Do not forget about the fuel filter, which also needs to be removed and purge the fuel hose. Everything is assembled in the reverse order.

If after reassembling the carburetor the saw does not start well, and there is smoke coming out of the muffler, then most likely the spring under the needle lever was lost. Due to the absence of this spring, the needle does not lock the fuel supply, so the spark plug “floods” with gasoline. Of course, in order to fix this malfunction, you must find the spring and put it back in place.

When repairing the carburetor, remember that it is a fairly complex unit, which consists of various small rings and parts

remove, starter, motor, stihl

That is why it must be cleaned and repaired with extreme care and caution

If the chainsaw does not start or stalls, then in addition to the carburetor itself, you should check the performance of the spark plug. If it is faulty, it should be unscrewed and dried. Also from the plug through a special hole to drain the excess fuel.

Remember that drying out must be done for at least thirty minutes, after which the spark plug is put back in place and the tool is started.

The cause of the malfunction can be a weak contact between the end of the spark plug and the high-voltage wire. If you don’t like the spark plug at all, you’d better replace it with a new one.

remove, starter, motor, stihl

STIHL 180 chain saw parts such as the anti-vibration elements, chain, guide bar and drive sprocket will wear out quicker than others. That is why it is advisable to keep spare parts in the workshop for their quick replacement.

Repairing the chainsaw with your own hands is in any case cheaper than having it repaired in a service shop. To avoid puzzling over why the tool stopped working, you can watch a video instruction on how to fix various STIHL 180 chain saw malfunctions. However, in the case of serious breakdowns, it is better not to do the repair yourself, and assign the work to a specialist.

Repairing the STIHL STIHL 180 starter motor with your own hands

In detail: STIHL 180 starter repair with your own hands by a real craftsman for the website

Despite the many varieties of modern building materials, wood is still the most popular. In this regard, chainsaws are in great demand among woodcutters, homeowners and dacha owners.

Among the huge variety of models, the most popular among both hobbyists and experienced foresters for many years remains a chainsaw STIHL 180, which is characterized by ease of maintenance, repair and operation. STIHL was founded more than nine centuries ago and started making petrol chain saws way back in 1926. Thanks to its many innovations, unpretentiousness and durability, the tools from this manufacturer are in high demand on the world market for woodworking equipment.

Before you start troubleshooting and troubleshooting, you need to have the right tools ready.

General view of the STIHL MS 180 chain saw with its main components

Since the chainsaw is a relatively simple machine, the list of accessories includes the following items:

  • a set of flathead and Phillips screwdrivers;
  • open-jaw wrenches;
  • spark plug wrench;
  • socket head set with collar
  • STIHL multi-tools.

In order to be able to accurately diagnose and repair the machine’s malfunctions you must first of all identify the causes of the malfunction. Following from the fact that the chainsaw is equipped with an internal combustion engine (ICE), the main causes of failure in the first place should be sought in the power unit.

Before you begin work, you need to stop the engine, let it cool down and exclude the possible start of the chainsaw. To protect your fingers, it is recommended to wear cotton gloves.

The most common repair problems with a STIHL 180 chain saw include:

  • engine does not start;
  • The engine stops and spontaneously shuts down during short work;
  • oil leaks near the chain lubricator;
  • engine does not develop full power.

Frequent problems with the chain drive system include broken links in the chain. You can repair it yourself by riveting the links or replacing it with a new one.

Despite the relative simplicity of design and the absence of complex mechanisms, experts recommend troubleshooting in a certain order. First of all the mixture in the fuel tank is checked, and if the liquid level is all right, it is necessary to pass to inspection of the chainsaw starting assembly. If this mechanism is in good condition check the spark plug functionality.

After the manipulations with the spark plug diagnosis (determining the presence or absence of sludge, the correctness of the gap between the electrodes, the condition of the sealing ring) we shift our attention to the carburetor. Fine sawdust, dust and soil particles often block the fuel system.

If cleaning the carburetor on a STIHL 180 chain saw does not restore the chain saw to its previous performance the reason is probably the cylinder piston group. The power unit is one of the most complex parts of the machine and can be almost completely disassembled.

The first step in diagnosing the fuel system is to check the fuel mixture level in the tank.

Key components of the fuel system in a STIHL 180 chain saw

Even if the owner is confident in the presence of gasoline, it is possible to exclude the vacuum created as a result of a clogged bypass valve. It is designed to optimize tank pressure with fuel consumption. For easy cleaning of the chainsaw breather use an ordinary medium-sized sewing needle.

When inspecting the fuel system pay attention to the integrity of pipes, the tightness of which can be violated by mechanical damage or prolonged use of the machine. Sometimes the cause of leaking mixture and, as a consequence, not the correct operation of the engine, lies in the wear and tear of the rubber gaskets and primer (button sucker). If you need to do a manual repair of a STIHL 180 on your own, you’ll need to buy a seal repair kit and replace it with a new one.

The cause of malfunction of this model chainsaw may be the failure of the ignition system and the motor starting assembly.

If the measurement of the gap between the flywheel and the module does not show deviations, it is necessary to pay attention to the spark plug.

Most manufacturers, including STIHL chain saws, recommend a clearance of 0.2 mm. This requires a coin, coin-wire or flat stylus, which can be purchased at any auto store.

After removing the spark plug from its housing, measure the clearance of the chainsaw spark plug between the center electrode and the side electrode. If it is excessive (more than 0.7-1.5 mm) value, the spark can ignite intermittently, and at a minimum (less than 0 °F) of 5 mm, the spark can ignite intermittently.7 mm). not enough for optimum ignition of the fuel mixture.

Classic spark plug assembly

The classic Husqvarna layout makes it easy to repair the chain saw yourself. Saw chain is to the right and side of the saw, where the emergency brake is located. Auxiliary handle grips engine housing from left to right. The on/off button is rear-mounted and thumb-oriented, and the gas pedal button is on the handle.

Starter drum and crank handle are on the left side, above the cooling grille. Bottom left: Fuel tank cap.

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