Disassembling Chainsaw Shtil 180 Do It Yourself Video

Preparatory stage

Repair of any equipment must begin with the preparatory work stage, and the Stil 180 saw is no exception. At the preparatory stage, before disassembling the Shtil 180 chainsaw, it is necessary to remove the side cover, chain and tire from the chainsaw. Next, using a compressor and a brush, you need to clean the chainsaw from dirt, sawdust, oil stains and other things.

When cleaning the saw, special attention should be paid to the place where the chainsaw drive sprocket is located, since this is the most contaminated area.

In places where there is a large accumulation of oil, you can wash it with clean gasoline.

Possible faults

If the saw does not start, the first thing you need to check is the spark plug, which gives a spark, which ignites the fuel in the cylinder. Start by removing the high voltage wire that the spark plug is connected to. Then unscrew the spark plug itself from the cylinder cover and inspect its condition. When working properly, the candle should be dry and have small deposits on the ceramic of a light color:

If the spark plug is wet, it means there are problems with the carburetor. It is necessary to adjust and set the fuel level in it;
Soot on the walls of the spark plug is dark or black in color, indicating a malfunction in the piston group.

If you have not found any visible causes of the malfunction here, the spark plug is dry, the carbon deposits are light, continue to work backwards. Since this is the final point of ignition of the working mixture. Now check if the spark is getting to the spark plug. This is the ignition system unit.

Checking whether there is a spark will not be any particular problem; to do this, just take the high-voltage cable to which the spark plug is connected, bring it to the cylinder block, leaving a small gap between them so that you can notice the spark slipping between them. Then we pull the starter cord and see if there is a spark and what color it is. A working spark plug should produce a spark similar to lightning. How it looks, look at the photo offered to your attention, everything is clearly visible on it.

If no spark is observed, check the high-voltage cable with a test light, if there is no probe. There may be a break in the place where it was bent most often. If the wire is ok, it is possible that the problem is an incorrectly set ignition angle. It may be too early or too late; in both cases, the chainsaw starts well and will not work.

Now let's try to set the correct gap between the moving and fixed contacts. Ideally, it should be 0.2 mm. You can check it with a dipstick since it is not a deficiency.

This was a description of the malfunctions of the older generation of chainsaws. The new generation includes modern chainsaws from Goodluck, STIHL and Husqvarna.

Removing the handle

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

At the rear of the handle there is a throttle trigger, which is connected to the carburetor through a wire rod; in order to disconnect the rod from the gas trigger, you need to unscrew two screws and disassemble the handle.

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

Removing the starter

At the next stage, the top housing cover is removed and the 4 starter mounting screws are unscrewed, after which it is necessary to remove the covers of the oil tank and fuel barrel. The starter is removed quite simply and there should be no problems.

After removing the starter, the opened internal cavity of the chainsaw must be cleaned, since there is usually a large amount of compressed small sawdust on the body under the starter.

Removing the flywheel

The flywheel of the Shtil 180 chainsaw is twisted with great force, so to remove it you will need a head with a metal knob. The nut holding the flywheel is unscrewed with a 13mm head.

How to repair a Shtil 180 carburetor with your own hands

To block the crankshaft from turning, you need to unscrew the spark plug and install a piston stopper through the spark plug hole; if there is none, you can use an old cord from the starter, with knots tied to it and immersed in the cylinder through the spark plug hole.

It is strictly forbidden to keep the flywheel from turning by installing a power screwdriver or other tools between its ribs and the body; with this method of blocking from turning, the flywheel blades are not able to withstand the load and break off.

Once the piston in the cylinder is locked, you can unscrew the flywheel nut. The thread in the nut is normal, so you need to turn it to the left. Having loosened the nut, you do not need to remove it completely; just unscrew it until its upper edge is level with the tip of the shaft, after which a soft metal drift is installed on the nut and a sharp blow is made on it. Thus, the flywheel jumps off the shaft from a sharp impact and can be easily removed without the help of additional tools.

Removing the clutch and oil pump drive

Before disassembling the clutch, it is necessary to remove the drive sprocket. To do this, carefully remove the lock washer from the grooves on the shaft and remove the sprocket and needle bearing.

With a high head of 19, you need to unscrew the clutch. The thread on it is left-handed, so it unscrews towards the bar, and not towards the rear of the Shtil 180 saw.

Having unscrewed and removed the clutch, you need to immediately remove the reflecting plate and the oil pump drive; this is easy to do, since they are put on the shaft without any fastening.

Carburetor, muffler and ignition coil

To remove the carburetor, you need to have a socket 8 and an extension, with which it is convenient to unscrew the nuts securing the carburetor and air filter. Before dismantling the carburetor, it is necessary to disconnect the ignition wire and choke rod from the engine control lever and remove the lever, only after this the air filter and carburetor are removed.

The Shtil 180 muffler is secured with two nuts, which you need to unscrew to pull it towards you, it can be easily removed.

The coil is secured with two screws; to remove it you just need to unscrew them.

How to Start a Shtil Chainsaw 180 Video

Removing and disassembling the engine

The engine is held in place by 4 screws installed on the bottom of the Shtil 180 chainsaw. To remove it, you need to unscrew them, and then carefully remove the engine from the seat and the rubber carburetor pipe.

To disassemble the engine, 4 crankcase screws are unscrewed and it is removed, then you can remove the crankshaft assembly with oil seals, bearings and piston rings.

Removing bearings and seals usually does not require additional tools, but if the bearings were pressed onto the shaft with force, then a special puller will be needed for dismantling.

To remove the piston from the connecting rod, you will need to remove the retaining ring from the seat using a thin screwdriver, then press out the piston pin from the opposite side, after which the piston is removed to the side.

Equipment

As standard with a saw, there must be a 35 centimeter (14 inch) bar and a chain suitable for this bar length (50 links). The manufacturer cares about the safety of customers and already offers customers a protective cover for the tool tire as standard.

Also included in the kit is a universal screwdriver key for unscrewing the spark plug, unscrewing the side cover and tensioning the chain, and an adjusting screwdriver for adjusting the idle speed.

Any saw must be supplied with an instruction manual, which describes in detail how to use the Shtil 180 chainsaw, as well as how to carry out diagnostics and maintenance.

Assembling the Shtil 180 chainsaw

Putting the stihl ms 180 saw back together 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 Shtil 180 chainsaw, and to the left of the piston should be the side of the crankshaft, which is intended for installing the flywheel;
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, seals, retaining ring 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 coat it with sealant and, once installed, tighten the 4 fastening screws;

To assemble the Stihl 180 saw after the engine has been assembled, you need to follow the reverse disassembly sequence. 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 watch the disassembly of the Shtil 180 in the video, it was made for inexperienced users, it shows the whole process in detail.

Disassembling the Shtil 180 chainsaw and assembling it, if you have some experience, is quite simple; the main thing is to thoroughly clean the saw before work and take your time. To ensure that small parts do not get lost, you need to use containers in which you should place spare parts during the process.

A common type of chainsaw is the chainsaw. This device is widely used in construction work, firewood collection and other various operations with wood. But no matter how high-quality the tool is, malfunctions may occur in its operation. It is more profitable to repair the Shtil 180 chainsaw yourself, as this will save not only money, but will also help you understand its structure.

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Required special tools for repair

Before starting repair work on the Shtil chainsaw, you need to prepare the necessary set of tools. A chainsaw is not a technically complex tool; to assemble and disassemble it, simple working tools that every man has on the farm are sufficient. But since the chainsaw comes from Germany, and the Germans are very pedantic people, there is a special Stihl tool for more comfortable repairs.

The Shtil multi-tool is made of high-quality hardened steel in a housing made of impact-resistant polymer. The tool is very practical and compact in size. It contains screwdrivers: a 3.50 mm slot for cleaning carburetor grooves and adjusting it, a Torx TX27 screwdriver.

Depending on the combination key model (0000 890 3401 or 129 890 3401), the tool has a set of spark plug keys from 16, , 19, respectively. The original multifunctional Shtil comes in a durable nylon case with a belt clip.

Principle of operation

Before identifying a malfunction and repairing the Shtil 180 chainsaw, you should study the principle of its operation and what structural elements it consists of. A chainsaw must contain its main element - a two-stroke engine. It is he who is responsible for the reliability and performance of the device. The engine is involved in starting the chain drive and maintaining its movement under the influence of the centrifugal clutch. In addition to the electric motor, the chainsaw includes:

starter;
flywheel, also known as a cooling unit;
ignition unit;
clutch and brake mechanism;
carburetor with STIHL compensator;
air filter;
fuel and oil tank;
muffler;
anti-vibration system.

Fuel from the tank enters the carburetor , where it is mixed with air coming from the cleaning unit. From the carburetor, a mixture of air and fuel enters the engine. The saw carburetor has one adjustment screw that controls the idle speed. All device settings are made at the factory and ensure optimal supply of the fuel-air mixture.

The mixture is ignited in the engine cylinder, and the engine is started using the starter. Under the action of the piston, the shaft that is part of the crank mechanism begins to move. There is a sprocket on the shaft onto which the chain links are placed.

The chainsaw uses a single-cylinder motor. A clutch is used as a protection mechanism, which allows the electric motor to switch to idle mode in the event of a chain jam. At the initial revolutions, special linings located in the radial direction are pressed by springs to the middle of the shaft, thereby preventing it from rotating. At high speeds, centrifugal force increases, which leads to compression of the springs. The linings are pressed away from the center of the shaft, the sprocket rotates and the chain starts.

The electrical circuit of the device is involved in the ignition system. Due to the use of a flywheel with magnets, an electromotive force (EMF) is generated during rotation, which leads to the appearance of current in the electronics unit. The block sends a signal to the spark plug, causing a spark to appear at its terminals. This spark ignites the mixture coming from the carburetor. After a successful start has occurred, the chainsaw begins to repeat all work processes in the cycle.

The device chain is made up of teeth and connecting elements. To protect the user from kickback, the device is equipped with a brake system. Oil supply occurs automatically under the action of a pump.

Failure of the fuel supply system (FSS)

During operation, some are faced with the fact that the fuel mixture stops flowing into the cylinder. This problem can happen for several reasons:

SHTIL MS 180: assembly

Dirty filter. In this case, you need to remove the hose and check the flow of the fuel mixture. The filter will need to be cleaned or replaced. As a preventative measure, this part should be changed every trimester.
Clogged breather. You can verify this theory by disconnecting the hose. If you find a blockage, you should clean it with a thin needle.
Small amount of fuel. Make sure that the fuel mixture is regularly present in the tank and is supplied correctly to the engine. Supply interruptions are possible due to a clogged filter. To avoid such problems, it is necessary to clean the filters from time to time.

It is very important to choose good quality fuel for your chainsaw. In addition, you need to ensure that the amount in the tank corresponds to the norm.

The STIHL saw itself is a fairly simple piece of equipment. However, despite this, many have difficulties with its repair, because there can be many reasons for the breakdown. Therefore, before starting repairs, you should make a diagnosis and identify the cause.

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The chainsaw is supplied in a box. I should immediately note that the tire in the package for the 180 is not included in the box, so it is either given separately or bent and compacted.

Disassembling a chainsaw

Before proceeding directly to disassembling the saw, you will first need to clean it. All operations must be performed carefully and slowly. To prevent fasteners and small parts from getting lost, you can use containers into which structural elements are placed during disassembly.

Disassembly begins with loosening the screws holding the clutch cover, after which the chain tension is released. Only after this the bolts are completely unscrewed. Then the clutch lining, tire and chain itself are removed. The next step is to remove the top cover of the housing. Using a brush and compressed air, the drive gear block is cleaned - usually this is the most contaminated area. The easiest way to clean oil leaks is with gasoline.

The stages of disassembling the device occur in the following order:

The vibration handle is removed. It is fixed to the saw body using three shock absorbers. To remove it, you will need to remove the plugs, and then, using a screwdriver, press out the shock absorbers, starting from the one located farthest in relation to the handle. Then unscrew the two screws and disassemble the handle. Now you can remove the throttle trigger by disconnecting the wire rod.
The starter is removed. After removing the top cover, access to the oil and fuel tank plugs will be free. By removing the plugs, the starter is removed. The starter installation site is thoroughly cleaned of sawdust.
The flywheel is released. In order to remove it from its seat, you will need to use a socket with size 13. Initially, the spark plug is unscrewed, and the piston is blocked through the resulting hole. Having loosened the nut, a drift is installed on it, on which a sharp blow is made. This action causes the flywheel to jump off the shaft, after which it can be easily removed by hand.
The clutch and oil pump drive are dismantled. First, the drive sprocket and needle bearing are removed. To do this, remove the lock washer. Use a size 19 socket to unscrew the bolts holding the clutch. It is worth noting that the thread on it is left-handed. After dismantling the clutch, the reflecting plate and the oil supply drive are removed.
At the penultimate stage, the carburetor with muffler and ignition coil are removed. In order to remove the carburetor, you will need a 8mm socket and an extension. Before removing the air filter and carburetor, you will need to disconnect the ignition wire and disconnect the choke. The muffler is held in place by two nuts that can be easily unscrewed.
The engine is removed. Turning the saw body over, remove the four screws holding the motor. Then, with a gentle movement, it is removed from the installation site.

The engine itself is easy to disassemble. First, four screws are unscrewed and the crater is removed. Next, the crankshaft is removed along with the oil seals and other elements. The piston is removed from the connecting rod after removing the retaining ring and pressing out the piston pin.

Drum repair

If the flywheel and starter are in order, but the Calm 180 chainsaw does not start, the malfunction and repair of the drum must be disassembled in detail. The main reason for the breakdown is the camera leaving. It is located next to the guide, which is located in the carburetor. With this type of malfunction, the pistons can also be damaged. To repair the drum itself, first disconnect the tire

In addition, it is important to unscrew the protective cover and inspect the carburetor. If there is no visible external damage, remove the guide

Next you need to inspect the cam. It connects directly to the adjusting shaft. If it shows small cracks, that means it should simply be lubricated with engine oil. After this, the carburetor should be reinstalled and try to start the tool. A loud saw sound indicates that the cam is hitting the wall of the guide. In this situation, you should immediately turn off the device. Otherwise, the adjusting shaft may also be damaged. To change the cam independently, you will need to remove the restrictor located next to the carburetor. After this, you can completely turn the part over. In this case, the adjusting shaft can be left alone.

The cam in the presented saw is installed with a diameter of 1.3 cm. When replacing a part, it must be carefully tucked into its original location. The best way to do this is to use a hammer.

However, in this situation, it is important not to overdo it and follow the guidelines. New camera available on "Calm 180" (market price) $200

Large range of petrol tools and accessories at affordable prices

The Kosi Kosa store's assortment includes a huge selection of specialized products designed to perform work or support important functions of work tools. So, depending on the buyer’s requests, the online catalog offers a choice of:

Tools:
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The question arises, what to do then?

Here are some common cases:

The chainsaw does not start;
If it starts, it works intermittently;
Insufficient power to operate properly.

Modern systems

Modern systems are equipped with chips that regulate all of the above problems. A method for independently setting the ignition timing depending on engine speed and power transmitted to the cutting element. At the same time, fuel is saved significantly without sacrificing power. It also makes starting the saw much easier, regardless of weather conditions.

The chainsaw itself has become simpler and more efficient and does not require expensive repairs. Ignition coils made using modern technologies and using new materials have literally become eternal.

READ Which Tire Can You Put On A Stihl 260

In addition to everything read, a video is offered here for a complete overview of the material presented.

2 comments on the post “How to set the ignition on a chainsaw”

I bought a STIHL chainsaw and practically never used it. I'm just repairing it. I can't start it.

Possible faults

If the spark plug is wet, it means there are problems with the carburetor. It is necessary to adjust and set the fuel level in it;
Soot on the walls of the spark plug is dark or black in color, indicating a malfunction in the piston group.

Chainsaw Stihl MS 180 ignition system, removal and installation of the rotor, setting coil gaps

Now let's try to set the correct gap between the moving and fixed contacts. Ideally, it should be 0.2 mm. You can check it with a dipstick since it is not a deficiency.

This was a description of the malfunctions of the older generation of chainsaws. The new generation includes modern chainsaws from Goodluck, STIHL and Husqvarna.

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Sources used:

https://benzopilok.ru/brend/stihl/ms-180-razborka-sborka.html
https://pochini.guru/svoimi-rukami/remont-benzopilyi-shtil-180
https://www.kosikosa.com/index.php