Saw calm ms 180 does not gain momentum. Everything about the speed of gasoline saws. Ignition coil malfunction

Prerequisites for which Shtil 180 does not develop speed

Chainsaw Shtil 180 not develops momentum or after you release the gas trigger, it continues to work without slowing down. These difficulties are quite common. Let's try to understand the reasons that result in the appearance of similar defects. In this article we will also look at how to carry out diagnostics if the chainsaw does not pull.

Why does the chainsaw not develop speed?

There may be several reasons for the lack of traction and disgusting acceleration of the chainsaw. Therefore, you should not immediately start disassembling and repairing the carburetor, since the reason may not be hidden in it.

The Shtil MS 180 chainsaw is equipped with a reliable carburetor, on which the manufacturer has limited the ability to adjust the power and maximum engine speed, so if the chainsaw loses traction, the carburetor is the last place where you need to find problems.

Muffler

You may ask, what is the first one? The answer is a muffler. The muffler is responsible for releasing exhaust gases and extinguishing their flames. All combustion products pass through it, which over time can clog it. The situation with a muffler clogged with soot is far from unique, and it occurs due to incorrect fuel consistency.

With the usual ratio of gasoline to oil, combustion products are not so saturated with soot that they clog the muffler. In this case, if the amount of oil is more than normal, excess carbon deposits appear when it burns. Further, carbon deposits accumulate under the piston rings and in the muffler of the Shtil 180 chainsaw. Disassembling the Stihl chainsaw does not gain speed when you put pressure on the saw. Thus, a coked muffler is the safest thing that can happen; the greatest harm from excess carbon deposits is the need to replace the piston.

How to check the muffler

To check the muffler, it must be removed from the chainsaw. To do this, using an 8 mm socket, unscrew the two fastening nuts and remove the part.

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Fundamentally: after the muffler is removed, you need to check the integrity of the gaskets between it and the cylinder, since very often they stick and break when the muffler is removed.

You can clean the part mechanically, using screwdrivers or knitting needles, and then blow it well with compressed air. The seating area on the muffler can be cleaned with sandpaper to remove burnt parts of the gasket.

The muffler must be installed in reverse order.

Fundamentally: when tightening the muffler mounting nuts, do not over-tighten the nuts, as the threads on the screws can be stripped.

The second reason why a calm chainsaw engine may reduce power and not develop speed is a blockage in the fuel system. Typically, the first place to start looking for a blockage is the fuel filter.

Checking the fuel filter

The fuel filter is installed in the tank of the Shtil 180 chainsaw, and it is not very convenient to pull it out. To make the process easier, you can take a small piece of duralumin wire and bend it at the end, then use it to hook the fuel hose and pull it, along with the filter, out of the tank. To check the filter, you need to blow into it; if air does not pass through, then the cause has been found, and the filter needs to be changed.

Saw does not develop speed, does not develop power.

Why does such a discrepancy arise that it seems saw worked great, but suddenly the power is lost and Not promotion

Calm 180. Classics of the genre. Doesn't develop speed

In order to clean the mesh filter, you need to remove the carburetor from the Shtil 180 chainsaw. The work begins by removing the top cover of the saw, after which, using an 8 mm socket, unscrewing two fastening nuts. Next, the filter housing is removed from the guides, after which the air damper rod and the engine control lever are disconnected. Lastly, the fuel hose and throttle linkage are disconnected, after which the carburetor can be removed from the guides.

The carburetor strainer is installed in the fuel pump chamber; in order to get to it, one screw securing the pump cover is unscrewed and it, along with the gaskets, is removed.

The mesh filter can only be cleaned using compressed air. Any mechanical methods are strictly prohibited, because the mesh is very soft and simply changes shape. Answer: chainsaw calm 180. Repair and treatment of childhood diseases. There is a spark, gasoline is flowing, because... The spark plug is wet, but the saw won’t start. How to treat it. When you press it, it simply crumples and bends form along the edge of the landing site, through which unfiltered fuel can enter the carburetor.

During the cleaning process, you need to cover the landing site with the filter installed in it halfway with your finger and only then blow with air, otherwise the mesh may fly away and it will no longer be possible to find it.

Carburetor depressurization and nozzle blockage

From time to time, when the screws securing the carburetor cover have become loose or the gaskets have become unusable, the chainsaw may also experience a loss of power; in order to exclude the possibility of this malfunction, you need to check the integrity of the gaskets and the tightness of the screws on the carburetor covers. To do this, you need to remove it from the motor (the method is described above) and disassemble it. Because of which the calm 180 does not start, there is a spark on it, why the saw does not start. Defective gaskets must be replaced using spare ones from the repair kit for the Shtil MS 180 carburetor.

In the case where a complete check of the fuel supply and exhaust gas system has been carried out, but there are no results. You need to check the main fuel injector valve. To check, you need to knock it out of the carburetor body. All work should be carried out according to the following method:

The carburetor is removed from the chainsaw.
The four screws securing the cover with the compensator are unscrewed, after which the cover can be removed.
The carburetor is installed on a wooden lining, after which, using a bolt with a diameter of less than eight mm and a length of 50, it is knocked out into the internal cavity of the carburetor.
Next, you need to select a small hose, the inner diameter of which corresponds to or is slightly smaller than the outer diameter of the nozzle and put it on the nozzle.
The next step is to blow into the hose. If it blows only in one direction, the nozzle is working properly, if it blows in both directions or does not blow at all, then the valve needs to be changed.

All of the above actions should help in eliminating the problem associated with the fact that the chainsaw does not dials rpm, in an unpleasant case, a full diagnosis at the manufacturer’s service center will help.

Why does the chainsaw not slow down?

There may be several reasons why a chainsaw does not slow down:

throttle spring broken;
jamming of the gas trigger;
rod bent throttle valve;
The corkscrew of the throttle shaft is lost, causing it to jam.

It is not difficult to solve all these problems; you need to conduct a careful inspection and accurately determine the cause, and then replace the faulty part. As a rule, if the chainsaw picks up speed well, it works at idling and has normal power, then the problem with the fact that it does not slow down is purely mechanical. And finding and eliminating a mechanical fault is much easier than identifying and stopping air leaks in the chainsaw crankcase.

Video

Calm 180 does not develop speed, a video of the most common reason can be seen below. The owner is in it chainsaws Shtil How to properly cut with a hacksaw on wood Despite the variety of power tools for woodworking, hand saws still popular among DIYers. The advantages are obvious: low cost, compactness and availability (especially if there is no power source). Any tool for cutting and sawing must be sharp, because it depends...

Why does the gas saw go out when I press on the gas: reasons and solutions

Often, chainsaw owners have to deal with their breakdown, and it does not matter what model of this type of equipment, since the nature of the failures is almost the same for all. Well, the chainsaw has stalled, so what next? Of course, you can include the equipment in specialized services that will repair your “iron friend” for a fee. But, as they say: why pay more?

In the end, you can personally disassemble the tool and repair it as the breakdown may be minor and you will have to pay a lot for this. But of course, in order to bring the tool back to life, you must be able to understand the reasons for its failure and how to fix it. So let's learn! In this article you can find answers to questions about situations when the tool simply throws after directly touching the gas. So let's get started.

Basic elements of a chainsaw

Before we get into the breakdown problems and repair tools, let's first figure out where the chain came from. First of all, I would like to note that this tool belongs to the category of equipment whose operation directly depends directly on.

It is also important that Chainsaws are equipped with a single cylinder engine, and whose work is carried out on fuel such as gasoline. It is worth noting that, despite its similarity with other tools, it does not have a gearbox. And it is replaced by a kind of single-stage chain gearbox, through which the chain (saw) itself moves.

If you have a limited budget, read the article about Russian manufacturers chainsaws.

Characteristic and possible reasons for failure. Fix the problem yourself

Chainsaws. Quite reliable and simple design. So if you take proper care of them and deal with them based on the manufacturer's recommendations, then they fail, very rarely, and quite quickly, various types failures are eliminated. But if you are faced with such a situation and want to repair your instrument yourself without turning to professionals, read the information provided below.

In fact, it is impossible to unambiguously and accurately determine the reason why the tool does not start or stalls when you press the gas, as many factors influence this. But do not forget that since the chainsaw is equipped with a simple two-stroke engine, for its efficient work Conditions such as lubrication, fuel, spark and air are important.

Cylinder fuel tank

Therefore, the carburetor is directly involved in preparing the fuel-air mixture, the filter cleans the air of dust, the ignition and spark plug create a spark, and lubrication. in gasoline.

Therefore, it is necessary to look for the causes of this type of breakdown in a sequential order, starting with simple ones and gradually moving to complex ones. And this is an important factor in proper repair, since a person who, without taking this into account, begins to analyze the carburetor is putting it at risk. Because this kind The device must be repaired or adjusted directly in special workshops(read about carburetor settings).

For trouble-free operation of the device, it is necessary to directly process the fuel

Chainsaw Stihl MS 180 problems with speed

Chainsaw Stihl MS 180 has some nuances that make owners nervous, and is expensive

Chainsaw Shtil MS 180 does not gain momentum. DIY chainsaw repair Shtil 180.

Brought in for repairs chainsaw Shtil 180. Chainsaw Shtil 180 not develops rpm. After visual inspection

And just use the oil that is made by your tool manufacturer. In addition, it is important to prepare this type of mixture in an amount that you will use within one or two weeks, but no more (see the proportion of gasoline and oil for chainsaws).

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Because otherwise, excess mixture directly in the canister will cause it to lose all its octane properties, and this will lead to significant problems with the tool.

In addition, the cause of the violation may be direct filling the spark plug mixture while the mechanism is running. To solve this problem, you need to unscrew and dry the candle, but remember that it cannot be burned in any way. Excess fuel should be drained through the hole (plug), wait 20-30 minutes, then replace it and try again to start the tool.

Chainsaws stop when you press the gas because no spark. This can happen if there is not good contact between the tip and the (high voltage) wire. However, if such a connection works correctly, but the spark still does not exist, then that is the whole reason. This is the ignition unit (electronic). It is important to note that such spare parts cannot be repaired, so they can be replaced.

Checking the spark plug

Do not forget that by examining the spark plug, you can obtain important information about the breakdown of the chainsaw. Because if its surface is dry, then the reason for this is the cylinder, which does not directly supply fuel. This is why you must test the full range of your ideas step by step. If the plug is in black carbon, it means that the carburetor is not working properly, that is, it is delivering too much fuel or pouring oil directly into the gasoline.

If the chainsaw stops when gas is added, this means that fuel is supplied to insufficient quantity for full operation of the chainsaw. This may be caused by clogging of the carburetor (its jet) and contamination of the filter itself (fuel). Remember that the first node should only be checked by professionals, but you can clean the second one.

In addition, the cause of the breakdown may be filter (air) if it is contaminated with dust. But do not forget that each model has its own easily removable and characteristic features. It is for this reason that do not hastily start disassembling and repairing the instrument, but it is best to “walk” through forums, where a large number of links are given by different owners, so as not to worsen the situation.

Like, for example, a chainsaw calms down when you press the gas for a simple reason, namely a simple blockage of the direct breather.

To solve this problem, all you need to do is remove the (fuel) hose from the carburetor and pay attention to whether fuel is leaking out of it. Because if the mixture flows with a full stream, this means that the partition is not dirty, but if it is the other way around. reason for the breakdown.

This is why the chainsaw nods when you press the gas. muffler. It is this part that can interfere with the full operation of the tool in cases where it is directly contaminated with exhaust resinous sediments. To do this, you just need to clean it.

Quite often the chainsaw partner gets pressed and the reason for this is piston group of cylinders. Because by examining them, namely the piston and cylinder, it is easy to determine the cause of the tool malfunction by directly replacing it. You can also directly drill the cylinder itself to match the dimensions of the new piston.

pistol pistol

But if after inspection you find that there is no damage on the piston and cylinder, in this case the cause may lie directly in the rings (piston). This type of inspection involves inserting the piston into the cylinder and carefully seating it with the connecting rod. If you suddenly feel play, then the rings need to be replaced, as they are already worn out.

Many people ask themselves: why does the chainsaw fall when I press the gas? The answer can also be found in insufficient chain lubrication(see chainsaw oil) as the oil line may be leaking or the straight passages may simply be clogged. This is why pay attention to the chain, because if it is dry, do not delay cleaning the channels that are involved in supplying oil directly to the tool bar. After this, carefully check the parts where the oil pump connections are connected to the pipes. But if you notice that oil is leaking in the joints or cracks are found on the pipes themselves, then in the first case, seal the leakage points with sealant, and the pipes must be replaced.

The first thing you should remember when purchasing such a tool is. this is that some parts of the saw need to be replaced with new ones after the end of their service life (passport). It is for this reason that the instructions should always be at hand, as they are described in detail here.

Such details include: sprocket (drive), tire, part of the system (anti-vibration), as well as chain. Since we must not forget that if this “filling” is not changed to a new one in right time, then these worn parts will negatively affect the rest of the chainsaw. It is for this reason that you often check the depth of immediate tooth development. Remember that it should not be higher than 0.5 mm.

Summing up

Of course, every thing we bought has an expiration date and sooner or later it breaks and how it becomes offensive is when the extent of its destruction is so great that it cannot be repaired. But you will agree that often we simply neglect technology, and when it stops working, we try to find ways to fix the failures by turning to a huge number of services.

But remember that even if technology breaks down, we can extend our “life”. Everything you need. it's just about keeping an eye on it and keeping your spare parts clean and organized. And then, undoubtedly, it will last for many more years. Equally important is the use of exclusively high-quality spare parts and “additives” (see Chainsaw injectors). Then your equipment will work smoothly, and you will simply forget what repairs are. Chainsaw Rd Gc38 14 Video How to quickly and safely assemble the RedVerg RD-GC38-14 chainsaw. Assembling and preparing for operation the RedVerg chainsaw. This assembly video is identical for 4 models of chainsaws. How to quickly and safely assemble the RedVerg RD-EC2200-16 electric saw. Assembling and preparing for operation the RedVerg chainsaw. This assembly video is equally suitable for chain saws....

Tools

Chainsaw Stihl The MS 180 is positioned by the German manufacturer as a tool for small jobs, with operation up to 20 hours per month. Chainsaw designed for use in garden landscaping, site clearing, firewood collection and other common sawing operations tree species and wood.

Chainsaw Stihl MS 180. Classification of the model according to technical parameters

The Stihl MS 180 chainsaw corresponds to the light class due to its small weight and volume of oil and fuel tanks.
The tool is equipped with a two-stroke engine with sufficient power for heavy-duty operations.
The average height of the noise produced is up to 98 dB, which is higher than the noise from spoken speech - 76 dB.
Model weight 3.9 kg. Weight/power ratio 2.6. This is the highest coefficient for a non-professional tool.
Power 2 l. C. Either 1.5 kW.
Oil tank volume 0.145 l.
The volume of the fuel tank is 0.25 l.
Tire 350 mm. In 0.325 inch increments.

Chainsaw characteristics Stihl MS 180 compared to Husqvara 137 and Oleo-Mac 937

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Advantages of a popular model Stihl MS 180 is considered light and not bad power. The Husqvara 137 weighs 4.6 kg unloaded, and with a full fuel and oil tank it becomes even heavier and turns into a formidable weapon that is not of the lightweight type.

Calm 180. Classic of the genre. Not develops momentum

Why does this kind of problem appear? saw worked great, but suddenly disappears power And Not promotion

I didn't saw develops momentum, does not develop power.

Brought in for repairs chainsaw Shtil 180. Chainsaw Shtil 180 does not develop revolutions After visual inspection

Installation of the Ergostart easy start system into the tool, equipment with a quick tensioning device for the cutting chain, an electronic ignition system - these modern innovations are more common in semi-professional chainsaws and are not typical for the class Stihl, nicknamed “hobby class” in Europe. The rival Oleo-Mac 937 is equipped only with an electronic ignition system, while the Husqvara 137 only has the LowVib anti-vibration system.

Vibration neutralization is achieved by four shock absorbers made of dense, elastic rubber. Vibration indicator 4.3-7.2 m/s 2. For comparison: chainsaw of a similar lightweight class, Husqvara 137 produces a vibration characteristic of 4.9-7.7 m/s 2 and this is with an anti-vibration system. And the Oleo-Mac 937 model gives a vibration level of 5.2-5.5 m/s2.

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For operator safety in the chainsaw Stihl 180, the Quik Stop anti-kickback system is activated. The Husqvara 137 and Oleo-Mac 937 do not have such protections. Working with these models requires skill and experience.

In a chainsaw Stihl The 180 tire is smaller than in the Husqvara 137 and Oleo-Mac 937, but its location and fastening to the 180 with four rivets allows for more complex work.

Another advantage Stihl 180 is a high-quality, complete insulation of the sprocket rollers. The user will be spared from servicing this node.

The best option for a professional user or a novice master the best option from light “hobby” class chainsaws Stihl MS 180. This model is ideal for people with minimal technical knowledge who are not going to waste time on calibration and maintenance chainsaws. Slightly smaller than in similar models of other brands, the tire will allow you to cut thick wood boards.

The lightweight and compact model of the tool is used for household purposes, but despite its optimized performance, sometimes the Shtil chainsaw does not start. Problems manifest themselves in the fact that the engine starts and stalls, is unstable, cannot develop the required power, or suddenly gains high speed.

Why does the Shtil chainsaw not start?

To pre-diagnose the causes, check the operation of the fuel pump, appearance spark plugs, fuel flow, carburetor functionality and filter condition. Pay attention to the performance of the cylinders, pistons, muffler, and crankshaft bearings. After preventive measures, they try to start the chainsaw. Insufficient lubrication of rubbing parts also becomes a factor in poor performance.

No spark

The spark on the spark plug is checked. The functioning of an element is influenced by various factors. When testing the mechanism, the reasons are revealed:

insufficient carburetor adjustment;
large oil in gasoline;
clogged fuel and air filters.

Due to working in such conditions, carbon deposits accumulate on the spark plug contacts. Subsequent corrosion of the conductors becomes the reason that there is no spark in half of the cases of malfunctions. This happens because the gap between the modular contacts changes. To check the spark do the following:

the tip of the high-voltage cable is removed;
the candle is unscrewed;
the tip is put in place;
the candle is leaned with its wide end against the cylinder;
start the starter.

If during startup a bright spark resembling lightning appears between the electrodes, then the ignition unit is working. If there is no flash, clean the entire element and adjust the gap between the conductors. Sometimes there is no clearance between the flywheel and the ignition coil. When the flywheel rubs, scratches are visible on its exterior.

Ignition coil malfunction

The module or coil cannot be disassembled; its suitability is difficult to determine without testing devices. Modern systems Ignitions are durable, lightweight and small in size. They are characterized by almost trouble-free functionality. Problems with a chainsaw malfunctioning due to the ignition coil can be resolved independently.

The outlet wires are tested for damage (including internal damage) that occurs due to vibration leading to friction. If no cracks are detected, then the ignition coil needs to be replaced. Sometimes a module malfunction is indicated by a weak, barely visible flash when the saw heats up. This occurs due to an increase in the temperature of the coil, which leads to an increase in the resistance of the transistor.

The peculiarity is that at the beginning of operation a spark may appear, but after prolonged use it becomes dim and disappears. Modern ignition coils cannot be repaired in a home workshop, so they are replaced with suitable elements.

Fuel supply

After unscrewing the spark plug, a wet coating is found on its surface. This indicates an excessive supply of gasoline to the combustion chamber. For this reason, the tool does not work or stalls, because the fuel does not ignite.

Another inhibitory factor is a clogged breather - a small hole in the gas tank cap. It is cleaned with a needle, otherwise Stihl chainsaw MS 180 will not start. To determine the incorrect fuel supply, the following steps are carried out:

remove the candle;
pour 2 cubes of gasoline into the hole of the candle with a syringe;
put the ignition device in place and put on the high-voltage wire cap;
the lever is moved to the hot start position;
pull the starter handle a couple of times.

If the tool starts and immediately stalls, then the fuel line is tested further. Check the gasoline filter, splashes from the engine crankcase, and the integrity of the partition in the pump when unscrewing the cap.

Crankshaft bearing failure

If the bearings are defective, a slight play is felt. To identify it, the flywheel of the Stihl MS 180 saw is swayed from one side to the other. The movement indicates that the flywheel is being moved towards the electrodes by its own magnets, as a result of which there is no spark. To remove the mechanism, dismantle the cutting element, remove the filter and clutch cover. To lock the crankshaft, remove the recoil starter cover and tighten the two bolts.

The clutch is unscrewed clockwise using the key. Remove the drum with the sprocket, replace the old clutch and tighten it until it stops. The crankshaft is locked so as not to break the starter. The mechanism is assembled in reverse order. To tighten, the brake handle is tilted forward, the tool is wound in, and then removed from the brake.

Bearings with defects are less often detected (the diameter of the holes in the cage is increased). To determine, disassemble and measure using a micrometer. Broken bearings are indicated by regular knocking noises. In this case, urgent repairs are required, because if the integrity of the crankshaft is damaged, the piston group and cylinder will fail.

Floods the spark plug

In this case, the spark is not able to ignite the fuel, which is large quantities enters the furnace to burn the combustible mixture. If the spark plug is flooded, then the carburetor is faulty or the cold engine does not start correctly. The engine is purged; the procedure is performed with the ignition off and away from open flames. To ensure fuel ignition at the time of start-up, clean the mechanism:

unscrew the candle, wipe it dry, let it dry for half an hour;
a large layer of carbon deposits is removed with a file;
the gap between the contacts is adjusted;
turn the tool upside down and drain the gasoline;
in this position, pull the starter several times (to remove residual fuel);
Reassemble in reverse order.

Chainsaw Shtil stalls: reasons

If the tool turns off immediately after starting, it means that some device or part has broken down. To determine the cause, the mechanism is tested independently or in service workshops. Sometimes the reason that the mechanism does not start well is improper maintenance of the saw:

insufficient amount of gasoline;
poorly prepared fuel mixture;
poor quality of lubricant;
muffler clogged with combustion products;
unadjusted carburetor;
obstruction of the air filter;
piston or cylinder failure.

When you press the gas

The sawing units operate at idle speed, but the chain saw stalls when the gas is pressed, as the load increases. Before use, warm up the tool by running the engine at idle speed for a minute. If this is neglected, the motor stops after pressing the pedal. Other reasons may be:

clogged or unregulated fuel mixing unit;
a clogged air filter does not provide the required air flow when the load increases;
a dirty gasoline filter does not allow the required amount of mixture to pass through;
The cylinder and piston walls rub.

A low octane number of fuel causes brakes, since this circumstance prevents the engine from achieving the required power when the load increases.

At idle

Violation of the functionality of the fuel unit system leads to air leaks. In this case, the unit stalls at idle and does not maintain its number. Additional suction reduces the air impulse to the fuel pump and passes through the sump membrane or crankshaft seals. Diagnostics is done with a vacuum gauge.

Stopping the engine when cold occurs for other reasons:

the spark plug channel contains an excess amount of combustible mixture;
the gap between the tip of the spark plug and the high-voltage cradle is not adjusted;
power supply failure.

Check the seals by pouring gasoline into the crankcase; the leak is visible visually. This means that the engine does not operate at idle speed, and at high frequencies, leaky oil seals will lead to bearing jamming. If elements leak, they are replaced with new ones and sealed.

Full speed ahead

Sometimes the engine stalls after normal operation. To establish the cause, pay attention to the accompanying circumstances:

The engine stalls in the middle of operation for no apparent reason. The starter is in a stationary position and does not turn. This means that the tool is jammed and requires urgent repair.
During normal operation, power decreases in a short time and the engine stops, the cylinders are overheated. The situation indicates an air leak under the rubber pipe between the carburetor cylinder, possibly due to a rupture. The air becomes depleted of fuel; the pipe needs to be replaced.

Not gaining momentum

Many mechanism systems are involved in the startup, so the loss of speed of the Stihl chainsaw after idling can be a consequence of various factors. Reliable idling and interruptions in the engine under load can occur for the following reasons:

development of engine life;
wear, deformation and corrosion of the piston group;
malfunction of the ignition coil or spark plug;
unbalance of carburetor screws.

If the tool does not develop speed, then the conductivity of the hole in the fuel tank cap is impaired. The occurrence of a vacuum does not provide the required amount of fuel, so the engine does not gain the required power. The speed decreases when carbon dioxide accumulates in the muffler, and the removal of combustion gases is difficult.

Doesn't slow down

The tool quickly reaches maximum speed without losing power. This situation is explained by the fact that:

the throttle valve does not work due to a weakened spring or traction element;
the switch on switch periodically fails;
there is no corkscrew on the throttle axis;
the carburetor is clogged;
The fuel hose and gasoline filter are not functioning properly.

What to do

The power tool is operated according to the manufacturer's instructions. Only after checking the chain tension does the unit start. At the same time, the filling of the tanks with combustible mixture and oil is controlled, and the device is securely fixed in the hands. If, when all the rules are followed, the mechanism refuses to work, then .

How to start a Shtil chainsaw correctly: instructions

The tool manufacturer has taken every precaution and developed a manual that makes it easy to start the mechanism. The user will protect himself from injury if he follows the suggested frequency of actions:

The ignition is turned on and the engine handle is placed in the down position. The flow of atmosphere from the air filter is blocked by the carburetor damper. To properly start a chainsaw, the throttle membrane must be open to enrich the combustible mixture.
The lever is set to the start gas position. The starter jerks several times before the first spark appears. If the flash passes, the instrument is ready to start. The mechanism operates at high speeds due to the closed throttle membrane. To transfer it to the idle speed regulation, the throttle trigger is pressed and immediately released. The number of revolutions quickly returns to normal.
The standard Shtil MS unit does not provide additional accessories for the lightweight version.

Idle speed adjustment

Before setting up, carry out maintenance of the tool. To ensure that the idle speed adjustment is effective, preventive measures are taken:

carburetor cleaning;
engine flushing;
cleaning the air filter;
warming up the engine.

To adjust the operation of the mechanism at idle speed, use the appropriate adjusting screw. Its rotation depends on the required setting:

During standard adjustment, the screw is turned counterclockwise until it turns tightly. After this, make 2 circles in the direction of the arrow.
If the saw operates at low speeds, then turn the screw clockwise until the chain begins to move. Then make half a circle in the opposite direction.
At high frequencies, the regulator is turned counterclockwise until the circuit stops. After this, the rotation is continued another half turn in the same direction.

It will not be possible to adjust the idle speed if there is air leakage into the engine through the gasket, acceleration pump, seals, or for another reason.

Ignition settings

Gasoline engines are equipped with an ignition system that ignites the fuel. The timing of the flash affects the operation of the motor. During mass production in factory conditions, the ignition of the chainsaw is not adjusted. Marks are placed on the corresponding rotating elements, which are aligned during adjustment. Incorrect adjustment leads to the mechanism starting and stalling.

Before adjustment, check the dryness of the spark plug and the functionality of the ignition circuit. The voltage supply cable to the spark plug is brought to the cylinder with a small gap and the starter is started. If there is no flash, test the cable with a probe. Then check the serviceability of the wire to the shutdown button.

If the cables are not damaged, then check the ignition coil. This is done with a special tester to ring the device. In this case, the indicators on the device must coincide with technical characteristics coils, which are specified in the instructions for use. If inconsistencies are detected, the ignition unit is replaced with a functional device.

The reel can become unusable due to vibration when the tool is dropped or hit, so you need to work carefully.

Replacing crankshaft bearings

First, measure the compression; if it is not there, then the reason lies in the breakdown of the piston group.

The required pressure in the cylinder should be 8 atm; if it is lower, then the cylinder and piston, rings, and crankshaft bearings may have worn out.

To find out the condition of the piston system, you need to completely disassemble the saw and remove all the main components of the mechanism.

Malfunctions occur both in expensive German or American modifications of chainsaws, and in their cheap Chinese counterfeits. It’s nice when the power tool starts up smoothly: the saw warms up and gradually reaches the rated power declared by the manufacturer, which is provided throughout the entire operating cycle. Things are worse if everything happens the other way around: after pulling the throttle cable, the unit begins to slip, runs jerkily after short pauses, stalls and restarts with the pusher.

There can be many reasons for this phenomenon, as well as scenarios for the development of events. Let us consider in detail each working situation and the breakdowns that preceded them.

What to do if the chainsaw does not idle?

Problems with idle speed are considered constant companions of chainsaws. There may be several prerequisites that could lead to stalling at the time of start-up and cranking of the chain when idling, the main ones being:

air and gasoline filters are clogged;
poor quality fuel mixture or improper preparation;
problems with the ignition module;
a carburetor whose settings no longer correspond to the load on the saw;
motor elements are deformed or rusted.

A series of actions are performed sequentially:

wash the fuel hose or replace it with a new one,
Clean the air filter, which could be clogged with sawdust and dirt particles. Modern air filters are reusable and can be washed with added detergent, completely removing the saw from the body;
check gasoline and motor oil, which may be of poor quality or simply not suitable for working with this saw;
testing spark plugs and carburetor.

Eliminating one or more possible malfunctions usually returns the saw to its former strength.

Why doesn't the chainsaw gain momentum?

Starting up is a complex multi-level process in which almost all life support systems of the saw are involved. That is why the fact that the chain saw loses speed, turns on intermittently and feels confident only at idle should be considered from different angles.

The following factors could lead to this:

a faulty motor - its service life could be exhausted, and the piston rings and cylinder could wear out, become deformed, or even succumb to corrosion;
a faulty spark plug or the coil itself - as a result, the spark necessary to ignite the air-fuel mixture is not produced;
unbalance of the carburetor screws, as well as a number of reasons that could cause it to fail.

The chainsaw does not develop speed: we test the device for malfunctions

The ignition module can be diagnosed for problems visually. To do this you need:

turn out the spark plug;
evaluate its appearance (it should not be filled with gasoline or contain a black coating);
check the distance between the coil and magnets (up to 0.2 mm);
if necessary, examine the spark plug block for spark supply using a working power cable.

If after checking no defects were found, you should proceed to checking the carburetor unit.

This working unit is one of the most vulnerable in modern chainsaws. New tools that go on sale from the factory have basic settings for low and high speeds, which must be reinstalled after running in and running in all the parts. Similar actions are performed if the saw does not develop traction corresponding to the maximum torque according to the instructions.

The figure shows a typical three-jet adjustment circuit.

In this case, you need to reconfigure one of them - the “H” jet, which is responsible for the operation of the saw under load. To do this, it is enough to adjust the fuel supply with the engine running at the highest chain rotation speed, using the tachometer and the operating instructions.

Other chainsaw malfunctions

Many users encounter problems when the chainsaw does not slow down. The device reaches maximum power in a matter of seconds, which cannot be reduced.

This may be due to the fact that:

the throttle valve does not function - its spring or traction element has weakened;
the power switch does not switch well;
The throttle shaft has lost its spin.

But the opposite situation can also happen - when the saw gains power uncontrollably. The reasons why the chainsaw itself gains momentum should be looked for in:

carburetor - it needs to be cleaned or reconfigured;
fuel supply system - gas filter, fuel hose;
malfunctions of the cylinder-piston pipes or pipes connecting them to the carburetor.

There are quite a lot of breakdowns that manifest themselves through speeds that are atypical for a particular part of the operating cycle. But careful attention to the instrument will help to diagnose them in time and return it to normal operation.