An honest review of the Stihl MS 250 chainsaw - from technical characteristics to popular faults and their repair

Question: What are the weak points in the Shtil ms 250 chainsaw?

Answer: in my opinion: It was possible not to spin the engine like that. There is enough power. Uncompensated carburetor.

Whether this should be considered a disadvantage, I don’t know - many manufacturers still do not compensate, and nothing, but on all produced Shtilevsky saws, except for 230 and 250, they are compensated, but these were left without. Although the design of the air filter is such that compensation for its contamination is not really necessary.

It is not convenient to clean the cylinder fins - the top cover cannot be removed and you have to remove the starter and get dirt out from under the cover. Not a frequent procedure, but sometimes necessary.

When constantly working on construction, before opening the oil tank lid, it would be good to sweep it with a brush first - little sawdust gradually accumulates in the tank and eventually blocks the oil line.

Oil supply is too small. It’s not that there’s not enough, but more wouldn’t hurt. Again, these are modern standards. There's no escape. And so - there are no special complaints - the design is old, all the shortcomings have been eliminated.

Question: The problem is this: the STIHL MS 250 saw has been in use for six years. Oil is not supplied to lubricate the chain (it does not depend on the air temperature); to be precise, it does not go towards the tire, but at the same moment during operation it intensively flows into the hole under the muffler.

I cleaned and wiped everything, but everything remained the same. Tell me, what else can be done?

Answer: Sometimes it happens. There, under the muffler, there should initially be a plastic plug. For some reason it sometimes gets squeezed out.

You can do it, here's what you need: Socket wrench "8" - remove the muffler. Long M6 tap - about 100 mm long, or standard with an extension. M6 screw, which is not a pity and the corresponding nut. Hacksaw for metal. Vise.

Here is the technology: 1 — Remove the muffler. 2 — Remove oil leaks. 3 — We lower a small piece of cloth with a slight tension into the hole so that it can be removed later.

Don't score too tightly! 4 - use an M6 tap to cut 5-6 threads in the hole, clean the chips and remove the cloth from the hole with a hook. 5 - from the M6 ​​screw we cut a piece with a length of threads 5 - 6 (or 5-6 millimeters), on this piece we cut a slot for a screwdriver. - the plug is ready. (The above-mentioned nut is used to tighten the screw through it and not damage the thread).

6 - screw the plug into the hole. You need to be careful here - you can’t screw it in deeply, otherwise it will block the outlet hole. You can insert a wire 2 millimeters in diameter into it from the tire mounting side and screw in the plug until it touches the wire. 7 — install the muffler and check the oil supply.

Question: I bought a Stihl 250 chainsaw. A week later I discovered a leak of black oil at the crankcase mounting point, running from under the screw, it is located on the right, closer to the handle. There are suspicions that the crankcase may not be sealed. What to do?

Answer: don’t worry - the leakage does not appear outwardly. No drips or similar manifestations. Only by indirect signs - first a slight increase in power and an increase in maximum speed.

Then, as the leakage increases, problems with idling begin, then problems with starting.

Question: Saw Shtil ms 250 starts and stalls. How to fix?

Answer: You first need to remove the fuel filter from the hose in the tank and try to work without it for a little while. It won't do anything - check the impulse hose - it's hard to see, but you can see it.

Using a small flashlight, look into the gap between the top of the fuel tank and the bottom of the carburetor box - the hose should not dangle loosely - it should be put on a nipple cast integrally with the carburetor box body. Sometimes it happens - when the engine slams, it breaks off.

If the hose is in place, then it’s more difficult. Rock the right end of the crankshaft - if there is even a slight play, you need to do a diagnosis.

The screws securing the pan may be loose, or the oil seal (usually the right one) may be damaged. I can also advise you to move the carburetor from a working saw and try to see if that’s the problem.

Question: I bought a Stihl MS 250 chainsaw. I came to the dacha, started it up, tried to cut it - everything is fine. Well, I move the universal lever to the stop position, but it doesn’t stall! In general, I took off the cover and closed the contact. Can you enlighten me on the device for stopping the engine?

I saw only one contact on the spring, and the second one was stuck into the universal lever itself and there was nothing else! It looks like there should be some kind of record there, but what kind?

Answer: At the end of the wire there is a regular female contact. It is inserted into the corresponding socket on the lever and the contact spring should touch it when the lever is in the “off” position.

There are no intermediate parts. There should be a spring on top. It has not so much a contact function as one that locks the shaft in different positions.

Question: I use a Stihl 250 chainsaw. I haven’t started the saw yet, I have no experience, so I have a few questions. 1. I was surprised by the operation of the brake, or rather, the sound with which it turns on, such a sharp, unpleasant click, the whole saw resonates, is this normal?

2. The drive sprocket is all black and red, it should all be silver-metallic. What does this mean? 3. There was no tire in the box, it was given separately. Wasn't this a reason to be wary?

Answer: The brake engages with a fairly loud click and the impact is felt. There is a powerful spring there, there is something to click. It's not clear from the star, you'll have to look it up. Tire and chain - yes, separately. The main thing is that both are Shtilevskoe.

Question: after the saw warms up, does the idle speed disappear or stall? If you don’t let off the gas, then you can work; when you let off the gas, it stalls. It starts up normally all the time, but when it’s hot, you have to press the gas to start it, otherwise it won’t start at idle, tell me what’s the problem?

I wanted to clarify about the idle speed (the chain spins) on the Shtil 250 chainsaw. I know that there are two screws in the saw that can regulate the idle speed. One LA, which can be turned by the user, the second L - it seems to be advisable to turn it at the service station, so as not to harm the saw.

According to the instructions, the user is allowed to turn these two screws, and only if this does not help should he contact service. Should I mess with the carburetor settings to optimize idle speed? If yes, what is the algorithm of actions?

Answer: There are three adjustment screws. “H” shouldn’t be turned at all, and it’s better to do the main idle adjustment “LA” - it’s just a persistent throttle screw.

The “L” screw is connected to the idle speed, but is more “responsible” for engine acceleration and transition mode, so it is better not to touch it, if possible.

In general, the 250s were characterized by a “buggy” idle. Depending on the year of manufacture and the installed carburetor model, of course, but sometimes it was not possible to achieve a normal idle at all.

Either it's too high and it spins the chain, or it stalls. And sometimes it “floated” - you adjust it, it seems to be normal, and suddenly - once again, it accelerates. Or vice versa - it falls. In general, it is not always possible. So turn down the idle “LA”, whatever happens is what happens.

Source: benzpila.ru

Chainsaw Shtil 250 faults and repairs

With all the variety of modern building materials, wood species remains very important. That’s why woodcutters, landscaping workers, and summer residents are interested in woodworking tools, in particular chainsaws.

The Shtil chainsaw is easy to use, inexpensive, reliable, and has a long service life.

Different people prefer different brands. Someone is interested in the Partner chainsaw, someone is interested in the Shtil brand device, someone is interested in something else. But they break down periodically, and their breakdowns are both similar and different. Next, we’ll look at how to repair a Shtil chainsaw yourself.

This brand is well known both among experts and among individuals involved in arranging their own living space. The great popularity of the Stihl chainsaw determines the frequent practical use of this tool and forces one to find methods for an effective snowball fight with its usual breakdowns.

Structural components

All engines, be it a car or another instrument using an internal combustion engine, have similar operating principles.

No exception, there are such famous chainsaws that are used with pleasure by consumers such as Goodluck, Shtil or Husqvarna.

The drive in them is the familiar internal combustion engine, respectively the fuel tank, the engine and the working element that directly performs the work, as well as other attachments that help with control.

Sometimes during operation some problems may arise with this fairly reliable tool like a chainsaw.

Stihl ms 250 repair (Part 1)

As mentioned earlier, the inspection of a faulty saw tool should begin with establishing the presence of gasoline in the fuel tank, as well as determining the technical condition of the breather.

Repair of a Shtil chainsaw in case of a malfunction in the accounting software (software) for fuel supply.

When checking the fuel level, you should immediately open the gas tank cap. This must be done even for which the design is intended, if the owner of the tool can be sure that there is gasoline in the tank.

Often the saw is unable to start due to fuel not entering the combustion chamber. The prerequisite for this in most cases is the usual clogging of the breather - a special bypass valve that serves to equalize the pressure in the container with the gradual consumption of gasoline. Here, repairing a chainsaw comes down to carefully cleaning the breather with a regular sewing needle.

A prerequisite for failure of the entire tool will be an inoperative starting mechanism or problems in the ignition system. If it turns out that the starting device works as usual, then you need to make sure that the spark plug is working properly. In order to do this, the spark plug is unscrewed from the socket and closely inspected, looking for the presence of foreign deposits on its electrodes.

Chainsaw starter device.

It should be noted that the presence of traces of a certain characteristic at the site of spark formation speaks very eloquently about the sources of “disease” of the entire starting accounting system. Such a source, for example, could be a carburetor. Thus, the complete absence of any signs of fuel on the spark plug (its complete dryness) most likely indicates a failure of fuel to pass into the combustion chamber due to a workable version of a clogged carburetor.

How to determine the advance angle of the built-in ignition?

The design features of the built-in ignition coil ensure a match between the optimal factory position of the moving piston and the discharge of the spark plug. During operation of 4-stroke power units, the spark must jump before the piston returns to its uppermost position. This is due to the fact that such engines take longer to burn fuel. In their factory design, the speed of operation of internal combustion engine parts is equal to the speed of planned ignition of the filled fuel. In this regard, the piston has time to travel a certain distance from the moment the created spark instantly jumps to the place where the spark plug is located, to the period during which the burning gases are guaranteed to create extremely high pressures.

How to disassemble, repair and assemble a Shtil chainsaw

To repair the device, it must first be disassembled. It is necessary to remove the side cover, saw chain and bar. Then clean the tool, blow it out with a compressor and clean all the components with a brush. Then remove the handle. To do this, remove the plugs from the shock absorbers using a screwdriver. After this, remove the shock absorbers and handle.

Then remove the starter. Remove the housing cover and unscrew the starter screws. Remove the part. Then remove the flywheel, unscrew the nut that holds it, and unscrew the flywheel nut. You need to turn left. Remove the flywheel. Then dismantle the clutch, oil pump drive and carburetor.

After this, the motor is removed and disassembled. It is held on by 4 screws on the bottom of the saw. You need to unscrew them and remove the motor. Then the engine itself is disassembled. Unscrew the crankcase screws and remove it. Then the crankshaft, seals, bearings and piston rings are dismantled. Upon completion of disassembly, repairs and troubleshooting are carried out.

After repair, the instrument will need to be put back together. To do this, install the piston on the connecting rod. The arrow on it should point along the chain, and to the left of the piston there will be the side of the crankshaft in which the flywheel needs to be mounted. Place the piston in the cylinder. Install the bearings, seals and retaining ring into the cylinder. After this, degrease the place where the crankcase is fixed and install it in its place. When reassembling, follow the reverse dismantling sequence.

How to remove the clutch

Before unscrewing the clutch, you need to remove the drive sprocket. Remove the corkscrew washer and remove the sprocket and needle bearing. Unscrew the clutch. Remove the reflector plate and pump.

How to remove and replace a sprocket

Replacing the sprocket on a chainsaw is necessary in cases where:

• jams chain movement;
• The drive sprocket has worn out.

To replace, you need to remove the chainsaw sprocket. The sprocket teeth must not deviate from the required dimensions, otherwise the operation of the saw will be accompanied by vibration, which will lead to damage to the crankshaft and bearings. The service life of the sprocket is 2 times longer than the working life of the chain. Use 2-3 chains until their cutting surface wears out. After this, change the sprocket. It is located behind the clutch. Remove the clutch assembly cover.

Remove the bar, chain and clutch. But first you need to fix the crankshaft. Then the puller is placed in the coupling hole and turned clockwise. Remove the coupling. Behind it is an asterisk. Now it is being dismantled. If it is faulty, it is replaced.

Oil pump repair and replacement

Let's look at how to change the oil pump. If the element leaks, the gasket between its two parts should be updated. If this part of the oil pump is not damaged, then it must be wiped and put back in place. Now check the hose. There should be no cracks on it. If the hose is damaged, it is replaced. Then they clean the outlet channels with a compressor.

Replacing the piston

Let's look at how to diagnose and replace the piston group. It is necessary to check the condition of the cylinder and the degree of wear of the piston. After dismantling the engine, unscrew the pan and remove the crankshaft and piston from the cylinder. Unscrew the piston pin stoppers. If the piston is faulty, it must be replaced. The retaining rings are fixed with the cut down. Before installing the piston group into the cylinder, lubricate the piston with oil. Before installing the crankcase, degrease its surface and apply sealant.

How to set the ignition

You need to turn on the ignition on the chainsaw. Ignition adjustment is carried out as follows:

• unscrew the spark plug and evaluate its appearance;
• specify the distance between the magnets and the coil (up to 0.2 mm);
• check the spark.

Differences between the original and the Chinese version

The popular base model became the basis for the production of a substandard analogue. The Chinese Shtil, with more or less success, copies the appearance and design of the branded instrument, but is significantly inferior in technical and operational characteristics.

Counterfeits are mostly presented in the assortment of small trading organizations. In order to avoid possible risks, it is better to buy the original from certified dealer companies and sales offices.

The differences between a Chinese counterfeit and a branded instrument are noticeable even upon superficial inspection. First of all, this:

• low quality and rough texture of the plastic body;
• custom logos and stickers;
• lack of serial numbers and engines equipped with simplified non-compensator carburetors;
• the presence of spark plugs with Shtilev symbols, which the company does not produce.

A significant part of the repair assortment on the domestic market consists of low-quality and short-lived spare parts and consumables made in China. Practice shows that the service life of these products is less than half the life of branded analogues.

Repair of the Stihl MS 250 chainsaw. Maintenance of the Stihl 250 chainsaw

Qualified repair of Stihl (Calm) chainsaws in . We are the official service center of this brand. This guarantees strict adherence to technology and the constant availability of original spare parts in our own warehouse. By contacting us, you can restore your equipment in the shortest possible time and without overpayments.

The STIHL MS 250 chainsaw is a lightweight, productive chainsaw for household needs.

Advantages of this chainsaw:

• 2.3 kW motor. This model is equipped with a QuikStop chain brake, an effective braking system responsible for safety.
• convenient lateral location of the saw chain tensioning mechanism
• the presence of preheating of the carburetor, allowing you to start the engine at low temperatures.

Technical data of the Stihl MS 250 chainsaw

STIHL recommends that maintenance and repair work only be carried out by an authorized STIHL dealer.

Description

The Shtil 361-ms chainsaw is a professional, powerful chainsaw with a long service life, designed for long-term use in both normal and difficult conditions. It has dynamic acceleration function, high torque. Considering the size of the chainsaw, the vibration level of the device can be called low. The chainsaw is equipped with a decompression valve and the ElastoStart system.

Chainsaw Stihl 361-MS

Purpose of the Shtil 361-ms chainsaw: professional construction work with wood, creation of wooden structures for any purpose, trimming branches and branches, preparation of wooden beams, boards, logging production, use for municipal purposes, for example, in forestry areas, sawmills.

The engine power of the Shtil 361-ms chainsaw is 3400 W (4.6 hp). The engine cylinder capacity is 59 cubic meters. cm. Two varieties of the same model are available - with a tire length of 40 cm and 45 cm.

How the Shtil 361-ms chainsaw works - video:

MAINTENANCE INSTRUCTIONS FOR THE STIHL MS 250 CHAINSAW

Weekly

• checking saw chain tension and sharpening condition
• deburring the guide bar
• checking the chain sprocket
• cleaning the fan housing

Monthly

• checking and cleaning the suction head
• checking and cleaning the filter in the fuel tank
• replacing the filter element
• Cleaning the fuel tank and lubricating oil tank Cleaning the cylinder fins

carries out scheduled and emergency repairs, as well as maintenance of chainsaws in accordance with the recommendations of equipment manufacturers.

Range of application

The manufacturer positions the saw as a universal, easy-to-maintain and durable tool.

The scope of its application extends to a wide range of economic work related to:

• with sawing fuel wood;
• caring for ornamental and fruit trees;
• construction of wooden structures and structures;
• design of original architectural and landscape design.

OUR STIHL CHAINSAW REPAIR SPECIALISTS:

• They will carry out diagnostics and determine the type of breakdown of the chainsaw: diagnostics of the tool when contacting our service center is carried out within one day;
• will prepare and explain the repair plan: we will write down your contact information to agree on the timing and cost of the repair;
• troubleshoot problems quickly and efficiently.

Urgent repair of the chainsaw is possible.

Also in our service center you can sharpen your old chain or buy a new one.

Sharpening cost: 120 rubles!

You can also find out the repair price for the Shtil 250 chainsaw by phone. To do this, try to describe the existing malfunction in detail to our specialist. Please note that accurate and complete information about the nature of the breakdown can only be obtained from an official service center.

We are waiting for you in our workshop in St. Petersburg!

Source: ruki24.ru

Trimmers and chainsaws

1) Malfunctions of the STIHL MS 180 chainsaw: The gas button gets stuck, and over time the gas button stops moving completely. Cause: A coating of translucent resin on the carburetor throttle shaft, which leads to jamming of the throttle mechanism. Tar is formed when gasoline dissolves poor-quality choke coating. Troubleshooting a chainsaw: Clean the carburetor throttle axis with acetone, and tin the air damper itself with tin.

2) Chainsaw malfunction: The chainsaw “does not pull.” Cause: Carburetor clogged. Chainsaw repair: Disassembling the chainsaw carburetor and cleaning it. When cleaning the carburetor, special attention should be paid to cleaning the additional filter (the mesh in the carburetor of the chainsaw) - remove the largest cover on the carburetor, remove the membrane under it and clean the mesh in the recess from dirt (be careful not to lose this mesh). Of course, clean it with a thin copper wire, rinse and blow through all the channels in the chainsaw carburetor.

3) Malfunction of the Shtil 180 chainsaw: The idle speed of the chainsaw has increased (the idle speed adjustment is not effective and stable). Cause of malfunction: Air leakage through the crankshaft seals or elsewhere. Troubleshooting a chainsaw: Replace the crankshaft seals and check other possible suction points.

4) Malfunction of the chainsaw: After disassembling the carburetor, the chainsaw is difficult to start, white smoke comes out of the muffler. Reason: When disassembling the carburetor, a spring was lost under the needle lever; as a result, the needle does not shut off the fuel supply and the spark plug is “flooded” with gasoline. Troubleshooting a chainsaw: Find and place a spring under the needle lever in the chainsaw carburetor.

5) Chainsaw malfunctions: The chainsaw does not start well and does not work well. Reason : The spark plug is “flooded” with gasoline due to the needle sticking in the carburetor or the rocker arm being raised high. Do-it-yourself chainsaw repair: Rinse and blow out the carburetor, set the rocker arm correctly.

Final check at idle

Read:

1. When the accelerator is pressed even slightly, the engine accelerates at an accelerated pace. With gradual deepening of pressure, you can notice that the engine speed increases proportionately, reaching the maximum permissible values.
2. When the engine is running, you can compare its sound to a four-stroke device.

If violations are noticed in the given parameters or the device has not been fully adjusted, you need to perform the main setup step again. Adjusting the carburetor of the Champion 254 chainsaw with your own hands. Initial carburetor adjustment shown. Sometimes actions are performed incorrectly. In this case, the device may fail due to the loss of the correct node settings. In this case, you will have to contact a specialist.

Malfunctions of the Shtil 180 chainsaw

It's either sucking air somewhere, or something is clogged.

The main ways to troubleshoot the STIHL MS 180 chainsaw are to disassemble, wash and bleed the carburetor, change the fuel filter in the tank, check the fuel hoses for cracking (they can suck in air). There is only one adjusting screw on the carburetor - idle speed (sometimes I turned it and the chainsaw started working again). The connection between the carburetor and the cylinder is reliable in terms of air suction - there is a plastic ring there (no gaskets are needed).

Purpose

STIHL saw is perfectly balanced and combines such qualities as high power and at the same time light weight and ease of use. The power allows you to install larger tires on this model, which means sawing thicker tree trunks, which increases productivity. Weight affects comfort when working with a tool for a long time. Small dimensions allow the saw to work in places with limited space or in dense thickets. This saw is convenient for clearing branches from a fallen tree or cutting out small growth.

If necessary, the STIHL 250 can cope with more complex tasks, but you should not work with maximum loads for a long time. The resource is still not the same as that of professional saws.

MS 250 won't start.

STIHL saw is designed using the most modern developments of German engineers, which we will talk about a little later.

Of course, the power unit of the STIHL MS 250 chainsaw cannot compare in power to the engine of a professional model, but it is also capable of much. The difference with a household chainsaw is felt as soon as you start making the first cut. If desired, buyers can purchase a richer package for the STIHL 250, in which it is additionally equipped with devices that increase the comfort of using the saw.

Chainsaw malfunction Shtil 250 (chainsaw carburetor malfunction):

Immediately after starting, the chainsaw operates at high speeds, and if you press the gas, instead of starting to accelerate, it “chokes” and even stalls. Or it starts poorly, does not pick up speed and stalls (this chainsaw malfunction also applies to other expensive chainsaws with an accelerator pump in the carburetor).

Cause of chainsaw malfunction: Wear of the rubber cuff on the piston of the accelerator pump in the carburetor (fuel accelerator). This leads to air leakage from the accelerator pump and the main jet supplies a lean fuel-air mixture (there is little gasoline in the mixture) into the diffuser, and the chainsaw first operates at high speeds, and then “chokes” and stalls. This happens after 2-3 years of operation and usually happens in the hot summer months.

Troubleshooting a chainsaw carburetor

Remove the carburetor from the chainsaw. Remove the fuel pump cover with the membrane by unscrewing one screw in the center of the cover. Next, turn the carburetor towards you with the throttle valve, on the side where there are two holes, in one you can see a pin, and under it there is an accelerator pump. Remove the retaining ring from the outside of the pin and disconnect the wire spring of the air damper. Unscrew the screw in the center of the throttle valve, remember how the throttle valve is positioned (so that you can put it that way later) and remove the throttle valve. Plug the hole with the pin with your finger (the accelerator is spring-loaded and if you remove the throttle axis and do not close the hole, the accelerator will pop out), then turn the throttle axis and remove it. Shake the accelerator (piston) with the spring out of the hole. There is a rubber cuff (ring) on ​​the piston - its wear is what causes the chainsaw to malfunction. It is necessary to replace the piston with a rubber cuff and a spring (they are sold as a repair kit). Or you can remove the worn piston with the spring, and plug the hole by pushing a rubber plug in there (the chainsaw will not have an accelerator pump, that is, it will accelerate not in 3 seconds, but in 4 seconds, but it will work well since there will be no suction air from the carburetor).

Assembly after troubleshooting the chainsaw (after eliminating the malfunction of the chainsaw carburetor) is carried out in the reverse order of disassembly. When assembling the throttle valve, before tightening the screw, the throttle valve itself must be positioned correctly so that it does not jam, and the threads of the screw securing the throttle valve to the axle should be degreased and coated with a special thread sealant (sold in small tubes, red, liquid) or flattened with pliers, because if this bolt gets unscrewed during operation, it goes straight into the cylinder) and repair or replacement of the piston cannot be avoided). So we looked at how to fix this chainsaw problem.

Source: chainsaws-portal.ru