Shtil 180 will not start until you pour gasoline into the cylinder

Chainsaw starter device, spring installation

The chainsaw starter structure is shown in Figure 1. This spare part includes the following elements:

• drum;
• cable;
• starter handle;
• frame with return spring.

Most modern chainsaw manufacturers use standard starter designs. The essence of the starter's work is as follows:

• a trigger cord passes through the handle; when the handle is raised sharply, the cord is pulled out;
• the movement of the cord sets the ratchet drum in motion;
• this drum makes the other one, located on the shaft, move;
• The crankshaft makes several revolutions during the above movements, the fuel mixture is compressed, a fire occurs and the chainsaw begins to work.

Figure 1. How a chainsaw starter works.

The sequence for installing the chainsaw starter spring is:

• twist the spring to the desired diameter and place it in the body;
• then we fix the spring on the peg with the outer end so that the end of the spring is directed to the center;
• insert a screwdriver into the hole in the drive disk, find the loop on the spring and lower the disk;
• check that the end of the spring is in the right place;
• We insert the dangling starter cord into the groove and twist it so that the cord does not dangle and the spring is tensioned.

Factory springs go on sale already twisted and fixed with wire. Such springs are simply inserted into the groove, then the wire is cut and the spring takes its proper place. More information and a visual example of spring assembly can be obtained by watching the following videos:

How to assemble a chainsaw starter spring:

How to tension a chainsaw starter spring - video from a specialist:

The chainsaw has stalled and will not start

If the tool stalls and does not start, you should first check the presence of fuel in the tank. Strange as it may sound, many people forget about this and when such a situation arises, they immediately try to repair the instrument, which can lead to serious damage.

In a situation where the saw has stalled and there is still gas in the tank, you need to evaluate how the saw worked up to that point. Maybe during work at the last moment an extraneous sound appeared, a grinding sound, a ringing sound, a loss of power occurred, or the tool suddenly stopped. All this allows us to preliminary assess the situation.

Engine jammed

Quite often there is a situation where the saw was working and suddenly stalled, the cause of which was engine jamming, which in turn occurred as a result of a broken piston skirt, destruction of the crankshaft bearing, a flyout of the corkscrew ring of the piston pin, or a break in the piston ring.

A seized engine can be easily determined by pulling the starter cord. If the starter does not turn, it is most likely jammed, and further repairs are only possible at a service center.

Broken fuel wire

When the chainsaw operates, vibration occurs, which can cause damage or breakage of the chainsaw's fuel line. In this case, the chainsaw will stall and it will be impossible to start. To diagnose a malfunction, you need to conduct an inspection and determine the presence of fuel leaks.

Overheat

Overheating of the engine during operation can cause the saw to stall and not start. Overheating is quite dangerous, as it can cause the piston in the cylinder to melt and jam the engine. At the first cases of overheating, it is worth diagnosing the tool for the presence of foreign air leaking into the engine and adjusting the carburetor.

Air leaks, as well as incorrect carburetor adjustment, affect the maximum number of engine revolutions and its lubrication, which in turn causes overheating and jamming of the tool.

Checking the fuel system

First you need to check the condition of the fuel filter. To remove it, you need to unscrew the fuel tank cap. Next, aluminum wire with a bent end will come to the rescue. With its help, remove the fuel hose, at the end of which there is a filter.

Chainsaw device Shtil 180

The condition of the filter can be checked by blowing into it. If air does not pass through, then the filter needs to be cleaned or replaced. If air flows freely, you need to look for a blockage in the fuel hose by disconnecting it from the carburetor. The blockage can be cleared mechanically or by replacing the hose.

If the fuel hose and filter are clean, but fuel does not flow to the spark plug, the cause may be a malfunction in the air pulse supply to the fuel pump.

Other reasons and solutions

If the chainsaw still does not start and the reason is not in the above parts, you need to look deeper. Other common problems include:

Fuel pump failure;

Lack of impulse in the pipe channel from the crankcase.

No fuel supply from the carburetor;

Diaphragm rupture on the fuel pump;

You can repair the above faults yourself, but of course it is better to give the chainsaw to a specialist; you can do the diagnostics yourself. Also during diagnosis you should check the following indicators:

Correct operation of the carburetor;

Optimal compression in the cylinder;

Compression in the crankcase.

Compression is checked both using a special device and manually. To “by eye” verify the presence of compression, just remove the spark plug and insert your finger into the cylinder hole. After a few times, turn the starter and if the finger is pulled into the hole. there is compression.

Main settings

Any candle has unique characteristics that must be taken into account when purchasing this consumable. The most important of these parameters are indicated in the instructions for the tool and in the labeling of the product itself. The main characteristics are considered to be:

• the gap that separates the electrodes;
• diameter and thread pitch;
• thread length (candle skirt or shirt);
• material from which the head electrode is made;
• heat number.

In addition, from the markings you can find out information about the manufacturing company, design features (number of electrodes), the presence of a built-in resistor and the height of the insulator.

Each of these parameters will help the owner of a tool or device with a two-stroke engine to select an adequate replacement for a failed original spark plug in cases where such a model is not available in specialized stores.

Chainsaw won't start when hot

In cases where the chainsaw does not start when hot, you need to conduct a visual inspection of all the main components of the chainsaw. The inspection should start with the spark plug. Check the spark, inspect the surface of the spark plug electrode, these actions will help determine the direction in which to look for the problem.

Malfunctions in the ignition system

If, upon inspection of the spark plug, it is found that it is wet and sparking does not occur at the contacts, this means that the problem should be looked for in the ignition system, inspect the coil, and check the gap between the flywheel and the coil contacts. You can also check how tightly the cap of the high-voltage wire sits on the spark plug, and the spark plug itself. Try replacing it with a new one.

Problems in the fuel system

If upon inspection it is discovered that there is a spark, but the spark plug is dry, then there is a problem in the fuel system. Checking it should start with the fuel filter. Next, you need to inspect the fuel hose and its attachment to the carburetor, pay attention to fuel leaks from the carburetor and the presence of gasoline in the air filter housing. It is advisable to start removing the carburetor only if a visual inspection does not allow you to determine the cause of the breakdown.

A characteristic sign of a problem in the fuel system is an excessive amount of fuel in the engine cylinder. Typically, signs of this include an excessively wet spark plug and the presence of a spark at the plug contacts. In this situation, it is necessary to turn the chainsaw over so that the spark plug hole is directed towards the bottom. If gasoline flows from the cylinder, then the reason that the chainsaw does not start is fuel overflow into the engine.

It “fills” with fuel, sometimes due to incorrect carburetor adjustment or malfunction.

You can familiarize yourself with the process of adjusting the carburetor using the example of the Champion 254 saw by watching the video instructions.

Business interruptions

To restore the operation of the saw, no matter the Ural or Shtil brand, you need to know the location of the breakdown. First we check and change the unsuitable fuel mixture

If the saw still does not start, then we check further point by point

First, we check and change the unsuitable fuel mixture. If the saw still does not start, then we check further point by point.

The problem is in the candle - we pull it out and dry it. Under no circumstances should you pierce it, as this will lead to a malfunction of the part. Fills a spark plug on a chainsaw: what to do? 30 minutes after drying, you can insert the spark plug back, first checking to see if there is any fuel left in its place.

The chainsaw is no longer considered an innovative technique intended exclusively for professionals. Nowadays, many summer residents and owners of personal plots have a similar universal unit in their arsenal. After all, modern manufacturers offer customers a wide selection of types and models of units of this kind.

If equipment of this type is provided with proper use and maintenance, spark plugs for Stihl chainsaws rarely become unusable. But if one day the chainsaw does not start, you need to figure out the problem in order:

A spark plug for a chainsaw is an important part for units of this kind. If problems arise with it (for example, it floods), they can lead to breakdown of all equipment; If, upon inspection, the chainsaw spark plug feels completely dry to the touch, this indicates a lack of fuel supply. Why is this happening? The salt of the problem is concentrated in the carburetor. Be sure to clean the fuel filter and turn the engine back on. Nothing happens? Then the carburetor needs to be disassembled and examined, but it is better to entrust this matter to specialists from the service center; If the unit does not start, then this may indicate a problem with the spark plugs of a different nature - it is flooded. Your chainsaw is calm: the spark plug is flooded and the engine of the unit does not start? To fix the problem, remove the flooded spark plug and dry it thoroughly. At the same time, it does not need to be heated. It is enough to drain the fuel mixture from the spark plug hole and leave the part to dry for half an hour. Next, put it back in place and start the engine.

In addition, it is important to inspect the contact between the tip of the spark plug and the high-voltage wire; It is important to ensure that the chainsaw spark plug gap is adjusted correctly.

Why does the spark plug on the chainsaw become calm? The answer is simple: this happens when the unit is started by an inexperienced user who does not follow the correct sequence of starting the equipment when cold.

Because of this, the spark plug tip may fail. To verify the presence of such a problem, unscrew the spark plug and insert it into the tip. Then place the part on the block and pull the trigger cord several times. If there is a spark, you don’t have to worry about the electrics and the condition of the spark plug.

Be sure to check that the chainsaw's spark plug gap is adjusted correctly.

A spark plug for a chainsaw is an important part for units of this kind. Why the spark plug on a chainsaw floods: reasons and. If problems arise with it (for example, it floods), they can lead to breakdown of all equipment; If, upon inspection, the chainsaw spark plug feels completely dry to the touch, this indicates a lack of fuel supply. Why is this happening? The salt of the problem is concentrated in the carburetor. These days your chainsaw is calm: it fills the spark plug and why does it fill the spark plug on the chainsaw. Be sure to clean the fuel filter and turn the engine back on. Nothing happens? Then the carburetor needs to be disassembled and examined, but it is better to entrust this matter to specialists from the service center; If the unit does not start, then this may indicate a problem with the spark plugs of a different nature - it is flooded. Let's figure out why the spark plug on a chainsaw floods, how to prevent it and how to deal with it. Your chainsaw is calm: the spark plug is flooded and the engine of the unit does not start? To fix the problem, remove the flooded spark plug and dry it thoroughly. At the same time, it does not need to be heated. It is enough to drain the fuel mixture from the spark plug hole and leave the part to dry for half an hour. Next, put it back in place and start the engine.

In addition, it is important to inspect the contact between the tip of the spark plug and the high-voltage wire; It is important to ensure that the chainsaw spark plug gap is adjusted correctly.

Problems with the STIHL MC 180 chainsaw

The power tool is operated according to the manufacturer's instructions. Only after checking the chain tension does the unit start. The filling of the tanks with flammable mixture and oil is immediately controlled, and the device is firmly fixed in the hands. If, after following all the rules, the mechanism refuses to work, then it is done.

A chainsaw, or chain saw, is powered by a gasoline engine. With all this, you need to know that the chainsaw is not filled with uncontaminated gasoline. A mixture of oil and gasoline in various proportions is used as fuel (depending on the brand).

Among the chain saws of the STIHL , the most common household model is the “STIHL 180”. It is armed with a small gasoline and oil tank (volume 0.25 l and 0.145 l, respectively) and weighs less than 4 kg. Compact and relatively lightweight, the STIHL 180 chainsaw produces a noise of only 98 dB, so your neighbors in your summer cottage will not be outraged.

The two-stroke engine is fully capable of handling household loads. This is a good “workhorse” for your farm. True, from time to time she can “mope.”

Owners of the STIHL 180 chainsaw unanimously recognize it as a good and reliable piece of equipment. But they also name several problems that in most cases occur with this chainsaw:

• Leakage of oil designed to lubricate the chain. Because of what: at the junction of the hose from the oil tank and the oil pump, the tightness is broken. As a result, the pump draws air instead of oil. How to remove: disassemble the chainsaw into parts. The hose can be changed or simply restored to density using silicone glue.
• The chainsaw won't start. Because of what: the valve, created to equalize the pressure in the gas tank when fuel is exhausted, is clogged and does not perform its function. A vacuum appears inside the gas tank, which prevents the supply of fuel. How to remove: open and close the gas tank cap, ventilate the combustion chamber. Remove the candle and dry it. Carefully clean the breather itself with a narrow needle.
• The candle needs restoration. If it has not yet reached its end of life, you can fix it without the help of others. Be sure to remove all remaining fuel from the tank first. Take out the candle and leave it outdoors, in a dry place, but out of direct sunlight. The candle will dry for about a day, or at least 12-16 hours. After which you can return it to its place. Fundamentally: do not try to heat the candle. This advice can be found in some outdated reference books, but for modern models, calcination will simply ruin the part.
• First critical help if your STIHL breaks down. Try these tips - they almost always work. And if not, read on. We'll take a closer look at the likely challenges.

A chainsaw, or chainsaw, is powered by a gasoline engine. With all this, you need to know that the chainsaw is not filled with uncontaminated gasoline. A mixture of oil and gasoline in various proportions is used as fuel (depending on the brand).

This information is contained in industrial instructions, which are best read in advance, and not just after the shtil chainsaw has broken down. And a saw of this brand, believe me, will not break over a trifle. This applies to any model that is classified as follows:

• Prof saw. Differs in power and endurance. Such equipment can work without breakdown for 15 hours a day. STIHL chainsaw of this class is appropriate.
• Semi-professional saw. A universal tool that is often used in the woodworking industry.
• Hobby grade saw. or household. Low power (about 2.6 watts) and endurance (about 20-30 hours per week). This is completely sufficient for everyday tasks such as trimming bushes and trees, preparing brushwood.

Among the chain saws of the STIHL brand, the most common household model is the “ STIHL 180”. It is armed with a small gasoline and oil tank (volume 0.25 l and 0.145 l, respectively) and weighs less than 4 kg. the STIHL chainsaw produces a noise of only 98 dB, so your neighbors in your summer cottage will not be outraged.

The two-stroke engine is fully capable of handling household loads. This is a good “workhorse” for your farm. True, from time to time she can “mope.”

Owners of the STIHL 180 chainsaw unanimously recognize it as a good and reliable piece of equipment. But they also name several problems that in most cases occur with this chainsaw:

• Oil leakage. designed for chain lubrication. Because of what: at the junction of the hose from the oil tank and the oil pump, the tightness is broken. As a result, the pump draws air instead of oil. How to remove: disassemble the chainsaw into parts. The hose can be changed or simply restored to density using silicone glue.
• The chainsaw won't start. Because of what: the valve, created to equalize the pressure in the gas tank when fuel is exhausted, is clogged and does not perform its function. A vacuum appears inside the gas tank, which prevents the supply of fuel. How to remove: open and close the gas tank cap, ventilate the combustion chamber. Remove the candle and dry it. Carefully clean the breather itself with a narrow needle.
• The candle needs restoration. If it has not yet reached its end of life, you can fix it without the help of others. Be sure to remove all remaining fuel from the tank first. Take out the candle and leave it outdoors, in a dry place, but out of direct sunlight. The candle will dry for about a day, or at least 12-16 hours. After which you can return it to its place. Fundamentally: do not try to heat the candle. This advice can be found in some outdated reference books, but for modern models, calcination will simply ruin the part.
• 1st critical assistance. if your STIHL breaks down. Try these tips - they almost always work. And if not, read on. We will look at the likely obstacles more carefully.

Question: During operation, the STIHL ms 180 c chainsaw stopped idling and stalled. It started with difficulty, but stalled again at idle.

After which it doesn't want to start. The next day, after unsuccessful attempts to start it, I removed and washed the air filter. It didn’t help, I had to remove the spark plug - it turned out to be dry, although there were plenty of attempts to start it.

I cleaned the breather with a needle (it was not clogged). I changed the fuel filter (although the old one didn’t look dirty). I cleaned the carburetor and installed a new spark plug just in case. The saw won't start! I turned the spark plug out again - it was dry. What to do?

Answer: Remove the muffler. Look at the piston, if there are longitudinal stripes on it, then it needs replacement.

Question: What is the difference between the drive and chain sprockets of the STIHL 180 chainsaw?

Answer: There is no difference between a “drive sprocket” and a “spin wheel”; these are different names for the same part.

Question: I bought a STIHL ms 180 chain saw, I really liked it, but I would like to ask you if my saw can cut thick wood?

Answer: The standard length of the MS 180 tire is 35 cm, you can cut a log - 70 cm in diameter, if logs of this diameter predominate, then you need a chainsaw of greater power.

The MS 180 will naturally cope with the task at hand, slowly and correctly sawing all logs of huge diameter, but you must keep in mind that by giving huge loads to a device that is not intended for this, you (in the best case) reduce the service life of the chainsaw, in other words, you shorten it complete renovation.

Question: Please tell me, is it possible to use a 45 cm guide bar on a STIHL 180 chain saw?

Answer: The MS 180 chain saw can be equipped with a bar of the longest length of 40 cm.

Question: Where is the breather located in the STIHL ms 180 chainsaw?

Answer: The ventilation system valve (“breather”) is located “on top” of the gas tank and oil tank, it cannot be seen visually, because everything is covered by the starter housing.

Question: On the MS 180, the gas button gets stuck in a horizontal position. What to do?

Answer: Most likely, the lever-traction mechanism is faulty; when the unit is turned over, one of the levers or rods “falls”.

Question: Why does the cylinder heat up and when it heats up does the STIHL 180 chain saw stall?

Answer: There is a problem in the ignition module, maybe there is no compression (suitable).

Question: we use a STIHL 180 chainsaw with a standard bar; we recently learned that people put a Carving bar on this model. According to the catalog, it is possible to install a 30 cm tire of this type, but is it possible to install a 25 cm tire or is it not possible for this model?

READ Stihl Stalls When Pressing Gas

Answer: Carving has a very small nose radius. It is better to use a chain with a 1/4 pitch with this tire. And then the tasks begin. Chains like this are very rarely available at retail, and plus the 180th one you can also find a 1/4 sprocket.

Maybe it makes sense to look for a 3/8 1.1 Rollomatic Mini 30 cm tire. Its article number is 3005 000 3905, if I’m not mistaken. She has a small nose with a 7-tooth star. Somewhat larger than Carving, but not so picky about lubrication.

Question: Where should the arrow on the piston point towards the muffler or opposite the STIHL 180 C chain saw?

Answer: The arrow should point towards the muffler (rule for all STIHL ).

Question: Tell me, what is the clutch thread (left or right) on the MS 180 chain saw?

Answer: All STIHL have a left-hand thread on the clutch.

Question: The starter on the STIHL ms 180 chainsaw pulls out jerkily, what is the reason?

Answer: There may be several reasons - from a faulty starter (starter spring, etc.) to a faulty cylinder-piston group.

Answer: The gas hose rubber could have popped out and could overflow through the gas tank breather. The first needs to be corrected, the second is acceptable!

the STIHL chainsaw does not move during operation while the brake lever is in the middle position, and only begins to rotate when you pull it towards you.

Why does a chainsaw fill a candle?

There are several common causes of combustion chamber overfilling, but, fortunately, each of the possible problems can be eliminated without special skills. Among the current reasons for filling a spark plug are: an error during the first start, a carburetor defect or a clogged air filter. To get an extremely complete picture and understand why the spark plug on a chainsaw is flooded, it is better to familiarize yourself with a brief analysis of each problem.

Error on first launch

saw (when cold), is expressed in excessive supply of the fuel mixture after several extra rotations of the starter. Being distracted or due to inexperience, you can miss the moment of ignition and continue trying to start. Since the air damper is closed at this stage, with each jerk of the starter only the fuel mixture will enter the chamber, which will be collected without the possibility of ignition. To flood the contacts, 5-10 extra revolutions are enough, after which the engine will no longer start, even if the throttle is opened.

Carburetor defect

does not occur out of nowhere, but after prolonged storage of the tool without draining the fuel. The mixture of gasoline and oil begins to disintegrate already in the first month, reacting with the miniature components of the mechanism that it envelops. First of all, the membrane becomes rough, disrupting the rhythm of its work. The axis of the float (rocker arm) becomes rough, making it difficult to tilt, and the needle tip is also eaten away, reducing the tightness. Even one of the 3 indicated defects can disrupt the operation of the carburetor system, which will not be able to restrain a moderate fuel supply.

Air filter clogged

occurs after several tens or even hundreds of hours of operation. The reason is so banal that sometimes it is overlooked when moving on to other options. Dirt clogs the pores, seriously reducing the throughput of the material, as a result of which the speed gradually drops, and with strong gas, the chainsaw choke and stall. The condition of the filter can be easily assessed “by eye” by inspecting it while removing the spark plug for inspection (they are located under the same cover).

Back to entry

I had the same problem, the new saw did not start after the second refueling, I couldn’t find anything in the advice, Unscrew the switch, look at the piston, but there is no need to do this if you feel that there is compression, the starting cable is pulled with force. But everything turned out to be outrageously simple, I filled the candle because of inexperience. We drain all the gasoline from the barrel. We unscrew the spark plug, check the spark, then you need to drain the remaining gasoline from the cylinder, to do this we turn the cylinder down and gently pull the starting cable, draining the excess about 10 times. Then I put the saw in the same position for 5 minutes for ventilation and drying, and tighten the candle. Fill the tank with gasoline and oil in the specified proportions. I put the lever in cold start, pulling it twice smoothly with a third jerk, and it started up on the third pull. And I was already planning to take it to the service center.

Same problem, got a new one, and stopped starting at the second gas station. I checked that the carburetor was overfilled, the spark plug was in the gasoline, and after drying, a spark appeared. After purging the cylinder as described in the instructions, I tried to start it. When the damper is in the “Cold Start” position, there is one flash; when I move the damper to the start position, it doesn’t start. I unscrewed the spark plug and it was filled with gasoline again. I blew it with the starter a hundred times, same problem. And so, having gone to your website, read Oleg’s advice (regarding blowing with the starter in an inverted position of the saw), I tried it, 10 grams of gasoline spilled out of the cylinder and carburetor. Then, attaching the spark plug (without wrapping it) to the tip, set the damper to the starting position and blew some more air. Assembled, fueled, and started. So thanks to Oleg for the good advice

!

• Author: Maria Sukhorukikh
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Video: Filling a Candle on a Stihl Chainsaw

Heating of the spark plug is facilitated by the use of heat-resistant motor oils for 4-stroke engines, extensive wear on the compression rings or the entire piston group as a whole.

Troubleshooting Tips

In the first case, the problem is solved by bringing the air intake device into proper condition. It is recommended to blow out the counter-flow air filter and replace it at best. Methods for cleaning other types of filters are listed in the included operating instructions.

• The carburetor is set to the engine warmed up to operating temperature. The power supply is set to optimal mode by rotating the adjusting screws for the quantity and quality of the mixture. The success of the work is determined by knowledge of the design of the fuel supply system and the interaction of all components.
• In particular, the complexity of adjusting carburetors with built-in compensators and other automatic control devices increases. Such equipment is configured using special equipment equipped with service and repair centers.

If the engine cannot be adjusted, excess fuel in the emulsion may be caused by a leaking valve or a frozen carburetor float.

The final result of the work performed:

• quick turn;
• stable idle;
• restoration of traction parameters;
• no smoke or noisy noise.

Criteria for the selection and operation of spark plugs

The simplest indicator of mixture quality is the porcelain insulator of the central electrode of the spark plug. Any shade of brown indicates normal mixture quality; white or smoked insulator indicates a poor or over-rich emulsion composition.

The quantity of the heated candle must meet the specified requirements.

• The cause of lubrication may be a so-called “cold” spark plug, which can be visually identified using a short insulator. Violations in sincerity are possible if the gap is incorrectly adjusted or the contacts burn out naturally.
• The recommended distance between the spark plug contacts is indicated in the instructions; in the absence of information, you can focus on the standard value of 0.7-1 mm. With a smaller gap, the ignition efficiency of the air-fuel emulsion decreases, and the gap increases possible interruptions in the formation of sparks.
• Smoking a wet or greasy candle over an open flame is not recommended due to the risk of cracking and premature failure.

Re-enrichment of the mixture in the combustion chamber with a technically reliable chainsaw is eliminated by an engine explosion. To do this, simply turn off the spark plug and turn the crankshaft several times using the recoil starter.

General information

Characteristics of this saw. a reason for pride for the German manufacturer. In this case, the unit. This is a tool that is designed to perform a small amount of work. The instrument is positioned for home use, which confirms the intensity of its use, which should not exceed twenty hours per month. Having such a unit at your disposal, it will not be difficult for you to maintain order in your garden, prepare firewood for the winter, and also clear areas. At the same time, he will be able to help you in solving other problems where there is no need to perform complex manipulations.

READ Chinese chainsaw does not start reasons

Other faults

• The question of correct idle speed after draining fuel from gas tanks is a pressing issue for many owners. According to experts, there is no need to worry too much about this. However, if you often encounter a similar problem, then it is enough to manipulate the carburetor, reducing engine speed, to restore normal operation of the tool.
• In some cases, the owner may need to clean the muffler as this part may be causing the problem. This operation is quite simple. It must be remembered that many owners are faced with problematic operation of their chainsaw due to a faulty carburetor.
• Although in some cases it may be quite simple to fix the problem, it is preferable to have experts repair this equipment. After all, not every one of us has the necessary knowledge and skills, and this risks the fact that if we troubleshoot problems ourselves, there is a risk of completely disabling the tool.

Stihl 180 Chainsaw Doesn't Start Floods Spark Plug

Household and professional chainsaws have a simple design and reliable, two-stroke internal combustion engines. Most drive failure is due to fuel system problems. Why light a candle on a chainsaw and how to fix it yourself?

The components of the entire line of gasoline power units operate on a precisely measured mixture of fuel and special motor oil designed to operate two-stroke engines.

In the carburetor, fuel and air are mixed in a ratio of 1:16, after which the air-gas emulsion is supplied to the combustion chamber.

Consequences of running an engine with untuned fuel equipment

The traction characteristics of the engine and its life expectancy depend on the composition of the mixture.

• Working on a lean mixture causes a drop in power, overheating of the cylinder and intense wear on the parts and components of the chainsaw.
• Working on a saturated mixture is no less dangerous. The malfunction manifests itself in an increase in the time it takes to reach operating speed, an increase in fuel consumption, and smoke from the muffler.
• There is also intense formation of soot in the combustion chamber and loss of mobility of the piston rings.

Algorithm for determining the causes of poor mixture formation

In any case, a wet spark plug on a chainsaw indicates a pronounced imbalance in the composition of the air-fuel emulsion. Even with a fuel to air ratio of 1:14, spark wear conditions due to lack of air prevent the normal combustion of the air-fuel emulsion compressed in the combustion chamber.

The main reasons for enriching the mixture in most cases are standard:

• the intake air filter is clogged;
• incorrect carburetor adjustment;
• interruptions in the ignition system;
• Low quality gasoline and transmission failure are also possible.

Risks of using low-quality fuel

Various low-octane gasoline and fuel substitutes contain alcohol components that take longer to burn completely. The effectiveness of such fuel is questionable, since there are a number of factors confirming ineffective operation and forced wear of the engine.

The chainsaw starts and immediately stalls

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.

To do this, simply unscrew the candle itself and dry it. You can also try heating, it will not be superfluous, but remember that this kind of manipulation must be carried out exclusively using a gas burner.

Otherwise, specific deposits may appear on the very surface of the immediate electrodes. The STIHL 180 chainsaw does not start: there is no way to influence the attempt to start the chainsaw. In the meantime, while your spark plug is drying, you need to drain the excess fuel directly through the hole and leave it to dry for about half an hour.

Start according to instructions

Different models of chainsaws have their own starting features and their own mechanisms. We will look at the device startup algorithm using the example of the popular Stihl MS 180 chainsaw model.

Before starting the startup process, it should be noted that the instructions for some chainsaw models state that before starting the tool, you should apply the emergency stop brake to ensure additional safety. But with a fixed brake, starting will be more difficult. Accordingly, it will be better to unfix it.

If you do everything correctly, then nothing will be difficult. If you are worried that without fixing the chainsaw at the moment of starting it will cause harm, then it is better not to take risks at all and not get to work. So, the algorithm for launching the Calm tool is as follows:

• Before starting to wind the tool, the damper adjustment lever should be moved to the lower position. Remember that it moves all the way down on the saw only when the gas button is pressed. Press the gas button and move the lever down. This will close the carburetor valve and lock the gas in the pressed position;
• Next, vigorously pull the starter handle until you hear the characteristic sound of an attempt to start the tool. It should stall immediately. Then the damper position adjustment lever is moved one step up;
• In this position, pull the starter handle again until the saw starts. And if it starts, then due to the fact that the gas handle is fixed pressed, the work will take place at high speeds;
• Then press and release the gas button once so that the throttle adjustment lever automatically assumes the operating position and the speed decreases;
• If it is necessary to put a heated chainsaw into operation, you need to put the lever in the working position and then start it;
• To stop the machine's engine, the throttle adjustment lever must be moved to the up position.

Back to entry

I had the same problem, the new saw did not start after the 2nd fill-up, I couldn’t find anything in the advice, Unscrew the switch, look at the piston, but there is no need to do this if you feel that of course there is compression, the starting cable is pulled with force. And what remains for our client to do turned out to be outrageously simple, he filled the candle and for lack of experience. We drain all the gasoline from the barrel. We unscrew the spark plug, check the spark, then you need to drain the remaining gasoline from the cylinder, for this purpose we turn the cylinder upside down and gently pull the starting cable, draining the excess approximately 10 times. Then I put the saw in the same position for 5 minutes for ventilation and drying, and tighten the candle. We fill the tank with gasoline and oil in the indicated proportions. I put the lever into cool start, pulling it twice smoothly with the 3rd jerk, and it started on the third jerk. And I was already planning to take it to the service center.

The same problem, the saw was new, and at the 2nd gas station it wouldn’t start. I checked that the carburetor was overfilled, the spark plug was in the gasoline, and after drying, a spark appeared. After purging the cylinder, as described in the instructions, I tried to start it. When the damper is in the “Cold Start” position, there is one flash; when I move the damper to the start position, it doesn’t start. I unscrewed the spark plug and it was filled with gasoline again. I blew it with the starter a hundred times, same problem. And so, having gone to your website, read Oleg’s advice (regarding blowing with the starter in an inverted position of the saw), I tried it, and 10 grams of gasoline poured out of the cylinder and carburetor. Then, attaching the spark plug (without wrapping it) to the tip, set the damper to the starting position and blew some more air. Assembled, fueled, and started. So thanks to Oleg for the good advice!

How to adjust the spark plug gap?

Ideally, this is done using a template that you can choose from:

• acquire;
• make it yourself using thick plastic.

Ideally, the gap between the electrodes should be about 0.5 mm. Try to secure the fasteners tightly before removing the template, but do not overdo it so as not to inadvertently break the fragile parts located with this assembly.

How to clean candles?

Pay attention to cleaning the spark plug (an important step in tool maintenance, as well as gap correction). If the unit is used intensively, this procedure is carried out weekly.

In another case, twice a year is enough (before the start of winter operation and the summer season).

Chainsaw spark plugs Partner, as well as spark plugs, Champion, parts of other models and brands of tools are ideally cleaned chemically. They are degreased using a solvent or acetone, and then dried (in the summer in the sun, or alternatively on a stove burner). Then the candle is treated with a 20% solution of ammonium acetate (hot liquid). If necessary, clean the spark plug using a nylon or metal brush. Finally, the part is washed and dried.

The chainsaw cuts to the side

When cutting, you may notice that the result is an uneven cut. Why does a chainsaw cut crookedly? There are several reasons:

• Incorrect chain sharpening. The teeth are sharpened at the wrong angle or only in one direction. Proper sharpening is required.
• Incorrectly selected chain. At very high speeds, a difference of even 0.2-0.3 mm between the width of the groove or the width of the seat will be visible, which is why the chainsaw cuts to the side. An appropriate circuit must be installed.
• Uneven tire wear. Over time, the tire wears out on one side and then the chain pulls to the side. Rotate the tire regularly to ensure even wear on both sides. If the wear is excessive, replace the tire.

Stihl 180 fuel system malfunctions

In some cases, as a rule, if there is a spark on the spark plug, when examining it, you can notice that it has a wet coating, this indicates an excessive supply of fuel to the combustion chamber and, as a result, the impossibility of igniting the fuel mixture.

The candle is flooded

Popularly, a phenomenon in which a spark cannot ignite a large amount of fuel is commonly called spark plug flooding. The cause of the malfunction lies in the carburetor, or in improper starting of a cold engine. If a malfunction is detected, you first need to “purge” the engine.

Engine algorithm

Important: under no circumstances should you “purge” the engine with the ignition on or near an open flame.

• Remove the spark plug;
• Turn the Stihl 180 chainsaw upside down and drain excess fuel;
• In an inverted state, pull the chainsaw starter several times (this way, under the influence of compression, excess fuel will be removed from the cylinder);
• Reinstall the spark plug and high-voltage wire cap;
• Set the engine control lever to the hot start position;
• Pull the starter several times and start the engine.

If everything is in order with the Stihl chainsaw and the cold start algorithm was simply broken, then after “blowing through” it should start. Otherwise, the fault must be looked for in the carburetor.

No fuel supply

This type of malfunction, like the others, has its own characteristic symptom. It consists in the fact that the working spark plug, which has a spark, will be completely dry. You can check for suspected lack of fuel supply using the following algorithm.

Algorithm for checking for lack of fuel supply

• Unscrew the spark plug;
• Using a syringe, pour 1-2 cubes of fuel mixture into the spark plug hole;
• Install the spark plug and put on the cap of the high-voltage wire;
• Set the engine control lever to the hot start position;
• Pull the starter several times.

If, after several movements of the starter, the Shtil 180 chainsaw starts up and immediately stalls, then the suspicions of a lack of fuel supply have been confirmed and you can begin further diagnostics of the fuel line.

Fuel line diagnostics

As a rule, diagnostics of the fuel supply system begins with checking the condition of the fuel filter. To do this, you need to unscrew the tank cap and, using an aluminum wire bent at the end, remove the fuel hose from the tank with a filter at the end.

Having taken out and dismantled the filter, you can try to blow into it; if air does not flow, then the problem has been found. If everything is in order, you next need to check the system for blockages.

To check the fuel supply hose, you need to disconnect it at the place where it connects to the carburetor, and then blow into it. A clogged hose can be cleaned mechanically; if this is impossible, replace it with a new one.

In the case where the supply hose and fuel filter are normal, but no fuel supply is observed, the reason may be a malfunction of the air pulse supply to the fuel pump.

Checking the pulse from the crankcase

The fuel pump on the Shtil MS 180 chainsaw is installed directly in the carburetor and operates under the influence of impulses from the engine crankcase of the Shtil 180 chainsaw. The impulse is transmitted through a pulse channel in the rubber pipe connecting the cylinder to the carburetor.

A clogged channel can lead to problems with fuel supply or its complete absence. To check the pipe, you need to remove the air filter housing and carburetor, and then use a thin metal wire to check the channel for blockages.

Another reason associated with the lack of impulse in the pipe channel is depressurization of the engine crankcase, which results in air leakage from it and a decrease or complete cessation of its supply to the fuel pump. The result of depressurization is partial or complete loss of functionality of the fuel pump. To check the tightness of the crankshaft seals, and indeed the crankcase of the Shtil 180 chainsaw, a special vacuum gauge is used, and since it is a special-purpose tool, it is mainly available only in service centers. The question arises, what to do?

Troubleshooting Tips

If the chainsaw spark plug has been flooded and you do not want to wait for the fuel to drain, there is a fairly effective and quick cleaning method.

1. If the repair is carried out in the field, then the saw is installed on a flat surface (everything is easier in the workshop - a table will help), after which the explosive wire from the spark plug is pulled out and the spark plug is taken out using a key, its spark plug electrodes are wiped dry. In this case, the circuit breaking system must be turned on.
2. The air filter cover is unscrewed and cleaned of dirt.
3. After this, the control lever is set to the minimum throttle position, and the starting cord is pulled up to 10 times, but not less than 5. Thus, the combustion chamber is cleared of excess fuel.
4. After replacing the air filter, installing the spark plug and connecting the wire, you should pull the starter cord a few more times. At the same time, the throttle valve must remain open.

If these actions are performed correctly, the saw will “come to life” again.

Most owners of chainsaws have filled the spark plugs more than once and at the same time have themselves returned the functionality of the tool more than once. Don’t be afraid of this problem: straight-growing hands and the presence of a user manual will help you continue to use the tool without going to a specialized center.

What to do when a candle on a chainsaw fills

Before heading to the service center, it would be a good idea to try to fix the current malfunction of the spark plug on your chainsaw yourself. Of course, this is only relevant if you have “direct” hands, since, otherwise, there is a high probability of increasing the cost of repair work.

Poor quality fuel

The chemical composition of low-octane gasoline includes various alcohol components. Their complete combustion requires more time than when using high-quality fuel, and accordingly this becomes the main reason for the failure of the chainsaw spark plug.

Unfortunately, many citizens naively believe that fuel containing alcohol has a positive effect on gasoline consumption and purchase fuel substitutes. In some cases, efficiency does occur, but such fuel has a negative effect on the chainsaw engine, shortening its service life.

Incorrect start

As a rule, during the first start of a chainsaw, inexperienced men miss a “pop” when the air damper is closed and continue to pull the starter. Because of this, a large amount of fuel accumulates in the combustion chamber, but there is a critical lack of air. The spark plug is filled with excess gasoline and there is no longer any spark to speak of.

Clogged filter

Due to severe contamination of the paper filter of the chainsaw, a sufficient amount of oxygen does not enter the fuel chamber. The fuel mixture does not have time to ignite and gasoline floods the spark plug. If the filter has already exhausted its service life (this will be noticeable by its appearance), then it must be replaced. If you don’t have a new filter at hand, but you still need to work, you can try blowing the filter with a reverse air flow.

Chainsaws from different manufacturers and model ranges differ from each other. To clean or change the filter, it is a good idea to first look at the instruction manual. Well, or look there if you can’t remove the filter without prompting.

Ignition system failure

Perhaps this is one of the most difficult problems that will need to be overcome in order to continue using the chainsaw. There may also be several reasons for the malfunction here.

Incorrect clearance

For the most part, the gap on the chainsaw's spark plug should be within 0.5 - 1.2 millimeters (more accurate data should be reflected in the user manual). In order to check if this is so, you need to do the following:

1. Using a screwdriver or special keys, unscrew the bolts securing the chainsaw cover.
2. Having gained access to the flywheel and magnetic core, the clearance level is checked.
3. If it does not correspond to the characteristics declared by the manufacturers, then using a special gasket or improvised means (an ordinary A4 sheet folded several times is perfect) the required distance is set.

Ignition coil problem

To make sure that the ignition coil is working properly, you need to be able to use a multimeter. This device allows you to measure the degree of resistance of the coil. A good coil will have resistance. In a burnt out one there is a break or a short circuit.

If the coil is working properly, then the gap between the coil and the flywheel may be broken. To set it up, you need to perform a number of simple steps:

1. Dismantling the saw body and loosening the bolts that secure the ignition system. The magnet (magneto) of the flywheel must be connected to the coil itself.
2. The adjusting plate is inserted between the flywheel magneto and the coil itself. The gap should be within 0.2 mm.
3. After tightening the bolts, the adjustment plate is removed.
4. It is imperative to rotate the flywheel completely and several times (2-3 will be enough). However, it should not cling to the coil.
5. The final stage is assembling the chainsaw body.

Carburetor adjustment failure

Often the spark plug on a chainsaw is flooded due to improper operation of the carburetor. For greater clarity, we recommend watching this video

If this is your first time setting up a carburetor yourself, pay attention to the following factors:

1. The presence of built-in compensators and other automatic control elements makes adjustment impossible without special equipment. In this regard, you will have to contact a specialized service center.
2. If there is no proper effect from adjusting the carburetor, the cause of flooding of the spark plug will be a stuck float or a lack of tightness of the valve.

Reasons why the STIHL saw does not start.

You also need to drain excess fuel from it through a special hole.

In addition, you must remember that direct drying should be carried out for at least thirty minutes, and only after this kind of manipulation can you install it back and actually try to start the tool directly.

Moreover, it may also be that your candle has simply passed its expiration date, in which case it is necessary to replace it. Therefore, excellent advice is that it is best to always have a new candle in stock, or preferably a set. Then you can replace it at any time and actually understand whether it was the direct cause of the device failure. Moreover, the cause of the breakdown may also be a weak contact, which actually connects the high-voltage wire and the end of the spark plug. A faulty ignition unit may also be the cause. It is worth noting the fact that in order to eliminate this kind of problem, it is necessary to replace the unit itself since it cannot be repaired.

But it is worth noting that it would be best if it is repaired by specialists, since if you have the necessary knowledge and skills, then you can simply break it and have to buy a new one.

It is important that even if you have discovered the very cause of the tool malfunction, this does not mean at all that you will be able to eliminate it yourself. Since there are such types of breakdowns that can only be corrected by a specialist. That's why it won't start, there is a spark and it won't start.

But if you have fully carried out all the manipulations prescribed above and have not missed a single nuance, but the tool has still not been corrected, then in this case the problem lies in the group, which is called the cylinder group. But if you still couldn’t “bring back to life” your iron friend, then simply take the chainsaw to a service center where your device will be repaired.

How to check the performance of the fuel pump

There is a membrane in the pump body, which during movement ensures the supply of fuel to the carburetor and engine. If the Stihl MS 180 chainsaw does not start, the diaphragm may have ruptured. You can check its integrity by removing the pump cover. If any defects are found during the inspection, the membrane is replaced.

Chainsaw repair Shtil 180

Related video: STIHL saw does not start - reasons

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Chainsaw Stihl one hundred and eighty - malfunctions and repairs

In the case of a Stihl MS chainsaw, one hundred and eighty malfunctions and methods for eliminating them may be different. In order to be able to independently fix breakdowns of the Stihl MS 180 chainsaw, we will independently study the most common causes of breakdowns and methods for eliminating them.

Incorrect start

As a rule, when starting a chainsaw for the first time, inexperienced men miss a “pop” when the air damper is closed and continue to pull the starter. Because of this, a large amount of fuel accumulates in the combustion chamber, and there is a critical shortage of air. The spark plug is filled with excess gasoline and there is no question of any spark.

What to do if the spark plug is flooded on the chainsaw

If you suspect a flooded spark plug, you need to inspect it. Using a spark plug wrench, it is unscrewed and carefully examined. If the spark plug is wet, but there is a spark, then it has definitely been flooded.

Many experienced owners are able to determine with a high degree of probability the current condition of a candle by its color. It is recommended to carry out this procedure regularly.

1. Light brown soot is exactly what all owners want to see. In this case, the functionality of the chainsaw is not impaired.
2. Black carbon deposits indicate an unbalanced mixture, namely a lack of oxygen in the fuel chamber. If the situation does not improve, there is a high probability that the chainsaw spark plug will flood again.
3. If corrosion is detected on the fork or the distance between the electrodes is too large, then most likely a lean fuel mixture is used.

Winding device

The basis of this type of model, as well as all other chainsaws, is the carburetor. But since we are talking today specifically about the STIHL 180 chainsaw, we will not deviate from the topic. So. The carburetor in this model has a single adjustment screw. that is, it is a kind of idle speed adjustment screw. While the jet of the fully loaded load is stationary.

In simple words, we can say that it simply cannot be adjusted (see here), while the full load setting simply cannot be changed. It is important that the carburetor itself was configured at the factory in such a way that, regardless of the conditions under which the chainsaw is directly operated, the air-fuel mixture is supplied to the engine itself.

What to do?

It is important that there may be no spark on the chainsaw due to a malfunction of the fuel system. In order not to look for a problem in the working ignition, this issue must be dealt with immediately. The carburetor of a chainsaw can “overflow”, that is, throw too much fuel into the combustion chamber

Inside the candle there is a porcelain insulator from which a metal core emerges. On it, under the plate, they make contact with the “ground” (minus) and a spark occurs. We also recommend reading the article about setting up a carburetor on a chainsaw with your own hands. If a gasoline saw starts and stalls, then read here. If it doesn't start at all, then here

The carburetor of a chainsaw can “overflow,” that is, throw too much fuel into the combustion chamber. Inside the candle there is a porcelain insulator from which a metal core emerges. On it, under the plate, they make contact with the “ground” (minus) and a spark occurs. We also recommend reading the article about setting up a carburetor on a chainsaw with your own hands. If a gasoline saw starts and stalls, then read here. If it doesn't start at all, then here it is.

If the space inside the spark plug between the round insulator and the ground is filled with excess fuel, especially together with conductive contamination, a short circuit (spark) may jump inside the spark plug. There will be no spark where needed.

However, if there is no spark on the chainsaw, the fuel does not burn, and the spark plug simply must be wet from the fuel when the carburetor is running. It is almost impossible to determine visually whether a spark plug is over-filled and therefore there is no spark, or not over-filled. Therefore, to accurately diagnose this “key point” (the carburetor or ignition is faulty), you need to have 2-3 guaranteed serviceable spark plugs on hand.

1. A working candle is placed.
2. The spark is checked.

If there is a spark, it means one of two things:

• the old spark plug was faulty;
• The old spark plug was fine, but was filled with fuel.

The working spark plug is screwed into place and they try to start the engine. If it starts working normally, the problem is solved. If not, turn the spark plug out again and look for a spark. There is no spark - install the next dry working spark plug.

No spark

If the chainsaw does not start, and you have not experienced any particular difficulties before, the first thing to do is check the spark plug. There may simply be no spark between its electrodes; this can only be determined after removing the spark plug. We check its functionality; to do this, we stick the spark plug into the cap of the high-voltage wire, and place the metal side of the spark plug on the cylinder (or other metal object). Now we do several manipulations with the starter, and if during them no spark is observed, the problem is specifically in the spark plug.

Attention : you must make sure that the ignition is on, otherwise the spark plug will not show a spark in any case. Also, to make sure that it is the spark plug and not the ignition coil that is faulty, take a similar spark plug and check for a spark on it. If present, the problem can be solved by simple replacement.

Ignition coil malfunction

Repairing the ignition coil is impossible; its design cannot be disassembled. But you can only check the performance of a part with a special device. If there is no spark to the spark plug, do not immediately blame the ignition coil; carry out diagnostics. Some people mistakenly run to the store for a new reel, so first make sure it’s broken and then make a new purchase.

Supplying fuel to the chainsaw

If the Shtil 180 does not start, there is a spark, then first of all we check the presence of fuel in the chainsaw tank. Of course, the problem is funny, but quite common. Next, we check whether fuel is entering the carburetor; to do this, you can disconnect the gasoline hose from the carburetor and pump in gasoline. After several manipulations, gasoline should come out of the hose, but not in a large stream, but in small jerks. If gasoline does not flow or flows poorly, the problem may be the following:

How to change the piston on a Shtil 180 chainsaw

If you want to replace an old piston and install a new one, you should know how to do it correctly and follow a certain method of action. You also need to have a small slotted screwdriver, a special combination Stihl wrench, a power screwdriver, a hammer, a drift made of soft material, a compressor and a stopper for the Stihl piston.

When starting work on replacing the piston, or the piston group assembly, the chainsaw needs to be cleaned of contaminants with maximum quality. Further, the work is carried out according to the following method:

1. The top cover is removed from the saw and the spark plug is turned out.
2. The side cover is removed.
3. Using a power screwdriver, remove the stopper from the shock absorbers of the chainsaw, after which its handle is disconnected from the body.
4. Next, you need to remove the driven sprocket and starter.
5. Install the piston stopper into the spark plug hole and unscrew the flywheel mounting nut and clutch.
6. Remove the flywheel, clutch and worm drive mechanism for the oil pump, which is located behind the clutch.
7. Unscrew the two screws securing the carburetor and air filter. Remove the filter, engine control lever and Shtil carburetor.
8. Remove the ignition coil and muffler.

https://www.youtube.com/watch?v=pbnRk-xzCIE

With the engine removed, the pan is unscrewed and removed, after which the piston assembly with the crankshaft is removed from the engine.

If you need to replace an old piston and install a new one, you should know how to do it correctly and follow a certain method of action. You also need to have a small slotted screwdriver, a special combination Stihl wrench, a power screwdriver, a hammer, a drift made of soft material, a compressor and a stopper for the Stihl piston.

When these operations are completed, you need to additionally clean the saw from dirt, then turn it upside down and unscrew the four screws securing the motor to the body of the chainsaw. After unscrewing the screws, the engine is separated from the body and cleaned again.

If such operations are carried out, you need to additionally clean the saw from dirt, then turn it upside down and unscrew the four screws securing the motor to the chainsaw body. After unscrewing the screws, the engine is separated from the body and cleaned one more time.

Features of operating the Stihl MS 180 chainsaw

This chainsaw model, as well as its modification. Chainsaw Stihl MS 100 eighty C BE, not difficult to use. Below we will study the main operating rules that will protect the main parts and mechanisms of the chainsaw from early wear.

The chainsaw does not start - reasons and repairs

If you see that the saw has stopped starting, this may indicate that engine oil is flooding the tool's spark plug. To inspect the spark plug, you need to remove the rubber plug on the body and unscrew the part with a spark plug wrench. If you see large spots of oil on the spark plug, it means that the cause of the breakdown lies specifically in this.

Oil is not supplied to the chainsaw chain

If you see this malfunction, you first need to adjust the oil supply. Adjusting the oil supply to the chain is carried out as follows:

• Locate the adjustment screw on the bottom of the chainsaw next to the sprocket;
• To increase the oil supply, the screw must be turned in the “” direction;

Stihl MS chainsaw one hundred and eighty stalls at idle

The most common reason. Incorrect adjustment of the saw carburetor. If the saw does not idle, the tool assembly must be adjusted. To do this, take the adjusting key from the saw kit and insert it into the “” screw on the tool handle. At the same time, slowly turn the screw clockwise until the saw starts to operate normally.

Gasoline does not flow - independent solution to the problem

The reason for this lies in a faulty carburetor. To repair the unit, it will need to be disassembled. However, before disassembling the carburetor on the Stihl 180 chainsaw, do not forget to disconnect the throttle linkage and ignition wire from it. Further actions are as follows:

• The carburetor device is attached to the saw structure with four screws. We unscrew them and pull the assembly out of the chainsaw. Before removing the carburetor, be sure to wear gloves to avoid getting oil on your hands;
• Before cleaning the carburetor, you will need to apply a household degreaser to its walls. Wait five minutes and begin wiping the sides of the knot;

• Remove the starter cover and remove the four screws;
• Inspect the parts responsible for sparking. If they are clean, check that the clearance between the magnets and the flywheel is correct. A gap of 0.4 mm will be considered optimal.

In order not to resort to regular carburetor repairs, try to use high-quality fuel and oil from trusted manufacturers.

The chainsaw does not start well - we are looking for reasons

If your saw won't start from cold, the first thing to do is. This is to check the pistons of the tool. The piston group of the Stihl MS one hundred and eighty saw is highly reliable, however, due to a lack of engine oil or mechanical shock, immediate replacement of the piston may be required. Before replacing the piston, we advise you to study the specified algorithm:

• Remove the top cover of the saw and unscrew the spark plug;
• Remove the stoppers from the shock absorbers, drive sprocket and starter;
• Next, the flywheel, worm drive and winning chain are removed;
• Then remove the ignition coil and muffler;
• Upon completion, the piston group of the chainsaw is dismantled.

What to do if the spark plug is flooded on the chainsaw

If you suspect a flooded spark plug, you need to inspect it. Using a spark plug wrench, it is unscrewed and carefully examined. If the spark plug is wet, but there is a spark, then it has definitely been flooded.

Many experienced owners are able to determine with a high degree of probability the current condition of a candle by its color. It is recommended to carry out this procedure regularly.

1. Light brown soot is exactly what all owners want to see. In this case, the functionality of the chainsaw is not impaired.
2. Black carbon deposits indicate an unbalanced mixture, namely a lack of oxygen in the fuel chamber. If the situation does not improve, there is a high probability that the chainsaw spark plug will flood again.
3. If corrosion is detected on the fork or the distance between the electrodes is too large, then most likely a lean fuel mixture is used.

Why does a chainsaw have trouble starting?

• fuel and air filters;
• reduced compression;
• carburetor adjustment;
• spark plug;
• ignition coil;
• gap between the ignition coil and the flywheel;

Let's look at each reason in more detail.

Fuel and air filter

Contamination of the main filter elements of a chainsaw negatively affects its operation.

For example, a dirty air filter will not provide enough air to the carburetor, which will affect the quality of the air-fuel mixture and normal engine starting. A dirty fuel filter will make it difficult or even cut off the flow of gasoline to the carburetor and make it impossible for the engine to operate.

Reduced compression

One of the common cases of difficult starting of a chainsaw is wear of the CPG (cylinder-piston group).

As you know, for a chainsaw to start normally, compression must be present in its engine. It is necessary for normal compression of the fuel mixture in the engine cylinder, and it also affects the operation of the fuel pump.

During the operation of the tool, the compression value drops and the chainsaw begins to have difficulty starting.

The reasons for the lack of compression or its decrease may be natural, because The engine wears out during operation. Problems can also be caused by a serious breakdown, for example, a scuffed CPG, or a broken piston ring.

A sign of low compression is weak starter resistance when starting. With reduced compression, a decrease in the power of the chainsaw is observed, which negatively affects its performance. The problem is eliminated by replacing the piston rings, or the entire CPG.

Carburetor adjustment

Incorrect carburetor adjustment will cause the chainsaw to not develop full power. It will be difficult to start, or not start at all. Carburetor settings directly affect the quality of the air-fuel mixture, which is necessary for normal starting and further operation of the engine.

If the carburetor is incorrectly adjusted, there will be more or less gasoline in the fuel-air mixture than required, and the mixture will not ignite even with normal sparking.

Excess gasoline in the mixture is usually called overflow. A characteristic sign of overflow is a wet spark plug, after several unsuccessful attempts to start the chainsaw.

Spark plug

The spark plug is one of the main elements of the ignition system. A spark is formed at its electrodes, and if this element fails, starting will be difficult or not possible at all.

The spark plug may fail completely, or work intermittently or produce a weak spark. Checking the spark plug is quite simple; to do this, you need to unscrew it from the engine, attach it to the cap of the high-voltage wire and, placing it on the cylinder, pull the starter. If the spark plug is in order, the spark will be powerful with a bluish tint. A weak spark with a reddish tint is a sign of a problem. A defective spark plug needs to be replaced.

The role of the spark plug

The spark plug in a Stihl chain engine, or any engine, is a simple device. Every time the engine flywheel completes a revolution, the magnet attached to it induces an electric current in the static magnet. This current generates a spark through the plug's electrodes. The spark ignites the fuel-air mixture in the combustion chamber, which moves the piston and makes the engine run. If the plug electrodes are spaced far apart or are covered with oil, carbon deposits, the spark is intermittent or weak, resulting in incomplete combustion and poor engine performance.

Why does the Stihl chainsaw not start after replacing the piston?

If the passage, if the saw does not start after replacing the piston, you need to check the fuel supply to the chamber, and also diagnose the accounting ignition system. Often, when installing the control lever on a chainsaw, craftsmen forget to connect the wires coming from the ignition coil, and as a result, the spark is lost and the saw does not start.

Also, the problem is hidden in a pinched fuel supply hose or, in this case, if it is not connected at all. There are a huge number of circumstances that you will like better, but it is worth keeping in mind that, provided that the work on replacing the piston is carried out correctly, the tool should start and work normally without any problems.

If the passage, if the saw does not start after replacing the piston, you need to check the fuel supply to the chamber, and additionally carry out diagnostics of the accounting ignition system. Often, when installing the control lever on a chainsaw, craftsmen forget to connect the wires coming from the ignition coil, and as a result, the spark is lost and the saw does not start.

Also, the problem is hidden in a pinched fuel supply hose or when it is not connected at all. There are a huge number of circumstances that you will like better, alas, you should keep in mind that if the work on replacing the piston is carried out correctly, the tool should start and work normally without any problems.

If the passage, if the saw does not start after replacing the piston, you need to check the fuel supply to the chamber, and also diagnose the complex of ignition accounting programs. Often, when installing the control lever on a chainsaw, craftsmen forget to connect the wires coming from the ignition coil, under the influence of which the spark is lost and the saw does not start.

Also, the problem is hidden in a pinched fuel supply hose or, in this case, if it is not connected at all. Naturally, you will like a huge number of circumstances, but it is worth keeping in mind that in this case, if the full range of work on replacing the piston is carried out correctly, the tool should start and work normally without any problems.