✅ The Stihl 250 chainsaw does not start well

Finding reasons why a chainsaw won't start

Amateur and professional chainsaws are complex devices. The motor life of their two-stroke engines, components and assemblies has its limitations. For this reason, quite reliable and expensive tools, along with cheap Chinese units, periodically fail and refuse to start. The situation when a chainsaw does not start or stalls is not very pleasant and sometimes confuses the user. How to identify and eliminate the malfunction, restoring the functionality of the tool.

Identifying and eliminating obvious chainsaw faults.

To determine the reason why the chainsaw does not start or stalls when starting, it is necessary to troubleshoot the tool. The essence of the procedure is a sequential inspection of the condition and operation of the main working elements of the saw engine. At this stage we check:

Presence of a spark on the spark plug;
Fuel supply;
Filter status;
Operation of the breather built into the fuel cap of the stalling unit;
Functioning of the exhaust channel.

Checking the spark on the spark plug and eliminating the causes.

The first step in finding the reasons why a gasoline saw does not start is to check the spark on the spark plug. There are many factors that influence the operation of this element. However, the main ones at the initial stage of tool troubleshooting are:

Incorrect carburetor adjustment;
The presence of more than the required amount of oil in gasoline;
Air filter clogged.

All of them contribute to the formation of carbon deposits on the spark plug electrodes. In 50 cases out of 100, saws do not start when cold due to the lack of a spark due to carbon deposits on the electrodes and their corrosion. The result is either a decrease in the gap or an increase in it.

Checking the spark plug of a non-working chainsaw

Checking for spark is quite simple. To do this you will need:

Remove the tip of the high-voltage wire;
Unscrew the spark plug;
Put the tip back on;
Place the candle skirt against the cylinder;
Start with the starter.

If at the moment the chainsaw engine starts, a good spark is observed between the electrodes, then everything is in order with the ignition unit. If it is not there, then it is worth cleaning the element itself and checking the electrode gap. If necessary, use a special probe to adjust the distance between the contacts.

For spark plugs from different manufacturers, the distance between the electrodes may vary. For some it may be equal to 0.5 mm. Others have 0.2 mm. Therefore, carefully study the manufacturer's recommendations.

There may be no spark at the spark plug for other reasons. The main malfunctions that affect poor starting of the chainsaw and unstable operation of the internal combustion engine at idle, which can cause the tool to stall, include the following:

Overfilling of the spark plug channel with fuel;
Lack of contact between the high-voltage cradle and the tip of the spark plug;
Failure of the ignition unit.

How to start a cold chainsaw if the spark plug channel is constantly flooded with gasoline? You can fix the problem while starting the tool using the following algorithm:

Unscrew the spark plug with a special wrench;
Wipe it with a clean and dry cloth;
Dry for 20...30 minutes;
Remove carbon deposits with a file and adjust the gap between the electrodes;
Drain the remaining fuel from the spark plug channel and dry it;
Collect everything and try to start the mechanism.

As a rule, these measures are quite enough to start the chainsaw and get the job done. However, this extreme measure does not eliminate the main reason why the engine does not start or stalls - improper operation of the carburetor, which needs fine adjustment.

If there is no spark due to poor contact of the high-voltage cradle with the tip of the spark plug, it is necessary to check the connection. The test can be carried out using a regular tester. If a defect is detected and corrected, the chainsaw should start without any problems.

If the check shows that the contact is reliable, but the saw still does not start, look for the reason in the ignition unit. As a rule, a faulty unit cannot be repaired or restored. This will require a complete replacement.

We determine the availability of fuel and its supply.

First, you need to make sure that there is a fuel mixture in the tank of the chainsaw that does not want to start, and that it is properly supplied to the carburetor. With a full tank, check how the mixture is supplied through the gas line. We disconnect the fuel system pipe from the carburetor and try to pump it up. In case of complete order, when pumping, gasoline will be supplied jerkily in accordance with the standards set by the manufacturer. Weak fuel supply or its absence can result from:

The fuel supply channel is clogged;
Fuel filter clogged with debris.

Often the cause of poor starting of a chainsaw can be a too full tank. In this case, you should pay attention to the presence of smudges under the saw housing cover. If they are present, then look at the connection of the gasoline supply pipe to the carburetor. Most often, it is squeezed out by pressure when screwing on the tank cap, which is tucked right under the neck, which prevents the engine from starting.

The quality of the fuel mixture can also be one of the reasons why the chainsaw does not start. If, after completing the work, you do not drain the remaining gasoline and leave the tool for long-term storage (more than 2 weeks), then the processes of resin formation and polymerization of the components will begin to occur inside the tank. What can cause carbon deposits to appear on the piston, rings and cylinder liner. Therefore, always prepare the mixture in only the required quantity before work.

Checking the condition of the fuel and air filters.

If the fuel quality is fine, the chainsaw engine may not start due to clogged fuel and air filters. To diagnose these elements, you will need to perform a number of manipulations associated with their dismantling.

For fuel filter:

Disconnect the gasoline supply line from the carburetor;
Pump up the fuel.

If there is little or no pressure in the pipe, disconnect the filter. Before doing this, empty the tank of the mixture and remove the filter element itself. Dismantling is done using a wire hook. A clogged replacement cartridge that causes poor starting of the chainsaw engine can be cleaned, but it is best to replace it with a new one. When using the tool in dusty conditions, cleaning should be done on a regular basis.

A clogged air filter can cause the chainsaw engine to run rough, causing it to stall or be difficult to start. Dust and dirt deposited on the adsorbent material make it difficult for air to enter the system, making the fuel mixture so rich that it will sometimes be difficult to start the tool.

Checking the air filter is one of the first steps in finding the causes of poor starting.

Removing the air filter should be done with caution, since dust accumulated on its surface during operation of the saw can get into the carburetor. And this is fraught with more expensive repairs. After disconnecting the cartridge, thoroughly clean it of accumulated dirt and wash it with detergent. Dry the element and carefully put it back in place.

Checking the breather and cleaning it.

The breather is another element, due to improper operation of which the chainsaw may not start or stall during the sawing process. This element is located on the fuel tank cap in the area of the air hole. This is a kind of valve that does not allow gasoline to leak out and equalizes the air pressure necessary for the free flow of fuel into the carburetor.

Return under warranty and post-warranty service

Chainsaw maintenance includes:

Monitor the quality of gasoline and oil on the basis of which you prepare the fuel mixture. Stick to the correct proportions when doing this;
Do not use fuel prepared more than two weeks ago. Regularly check and clean the gasoline and oil tanks, otherwise the engine will stall or the saw will not start at all;

Chainsaw chain maintenance

Clean the air filter regularly. It has a simple device and this operation will not require much effort from you;
Turn the bar over every time after the next sharpening of the chain - this will extend the service life of the saw set;
Regularly check and thoroughly clean the oil inlet and outlet ports, oil channel and guide bar groove. Remember that if the automatic lubrication system is faulty, your saw will start or stall;

Your main assistant should be the instruction manual. If you have lost it, you can contact the dealer of the company whose chainsaw you use; they will provide you with instructions in electronic form.

So, before each time you turn on a gasoline chain saw, be sure to check that the chain is in good condition, whether its teeth are sharpened, and whether it is well tensioned (does not sag, but is not too tight, it can be pulled a little away from the blade).

You can sharpen the chain using a special machine or a file with a special template (depending on the tooth pitch of the chain, there are different templates).

Every time after use, the chainsaw must be cleaned: the chain, bar, air filter, housing, cooling fins, cracks and other grooves are cleaned of sawdust. After using the saw, turn the bar over so that it wears evenly, lubricate the sprocket (if there are grooves for lubrication in the front of the saw).

During long-term storage, be sure to drain the fuel and oil! The chain and the bus form an electrochemical pair, so they rust together and must be stored separately.

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.

READ Petrol Trimmer Doesn't Start Floods

What to do if the chainsaw continues to not start?

If the initial inspection did not yield anything or the defects were eliminated during the search process, but the chainsaw still does not start, then you need to look for more serious reasons. It is best to identify and repair such breakdowns at a service center. However, if you have experience, you can find and eliminate them yourself. What to diagnose and check?

Compression in the cylinder;
Compression in the crankcase;
Carburetor operation.

In the first case, checking the compression in the cylinder will allow you to find out the condition of the cylinder-piston group (CPG) of a chainsaw that does not want to start when cold. To do this you need a compression gauge. The device is screwed into place of the spark plug and the engine is started idle. Measuring the readings allows you to judge the condition of the CPG. In the absence of a compression gauge, you can determine the compression in the cylinder offhand as follows:

Place your finger on the spark plug hole;
Try to start the chainsaw engine.

By placing your finger on the spark plug hole and pulling the starter, you can check the compression in the cylinder

If you feel that your finger is being pulled strongly into the spark plug channel, then everything is in order with compression. The absence of vacuum in the chamber indicates a malfunction. The cylinder-piston group needs a more detailed inspection, which will give an idea of the condition of the piston and cylinder, piston rings and bearings.

A chainsaw may not start when cold due to a lack of compression in the engine crankcase. The main reason for this is damage to the gasket located between the cylinder and the crankcase. It is quite easy to detect a lack of compression:

Disconnect the upper tube from the carburetor;
Pour gasoline into a regular cork;
We immerse the removed tube in the fuel;
We pull the starter several times.

If fuel is sucked out of the cap when the chainsaw starter starts, then everything is fine with compression. If not, look at the gasket.

If the fuel is drawn in, then everything is fine - the gasket is intact. Otherwise, you will have to purchase a repair kit and make a replacement. How to do this, watch the video why a Chinese chainsaw won’t start:

Starting the tool may be complicated by improper operation of the carburetor or its breakdown. It often happens that during the sawing process the fastening screws become loose and air is sucked into the cylinder. Check that the carburetor is securely fastened. Inspect it for fuel leaks. There can be many reasons for the malfunction. It is possible to accurately determine the malfunction, eliminate it and fine-tune the carburetor only at a service center.

After going through a step-by-step troubleshooting of the chainsaw engine, you will be able to find the malfunction, fix it yourself and successfully start your working tool. Do not take on types of work that you are not confident in. Entrust troubleshooting and troubleshooting to specialists from the service center.

Why the chainsaw does not start, reasons and solutions. How the mechanism works

Almost all tools, both foreign (Husqvarna, Makita, Shtil, Partner 350), and Chinese chainsaws, and domestic (Druzhba, Ural), are designed the same. Therefore, finding the reason why the device does not start and stalls will not be difficult.

There are four elements where problems may arise:

The fuel for which the carburetor is responsible;
Lubrication;
The air that enters through the air filter;
A spark, the quality of which depends on the ignition unit.

They all depend on each other and interact with each other. If any element does not work correctly, the saw stops working.

Let's start with the fact that all tools start up differently - hot and cold. Two commonly used mechanisms are responsible for this process.

Be sure to look at what is written in the user manual. It states that when turning it on, you need to make sure that the emergency stop brake is engaged. But starting a saw with a brake is much more difficult, so sometimes it’s better not to turn on the brake.

As you can find out from the instructions, inside the body there is a fuel tank and an engine, and outside there is a saw part (bar with chain), a handle and a starter.

First you need to figure out exactly how the tool won’t start. For example, the saw starts up, but immediately stalls, or loses power and cutting quality.

Perhaps interruptions in operation occur due to problems in the engine. But I would not recommend disassembling it right away. It is better to look for the problem from the simplest option.

It is very important to consider the quality of the fuel. If the mixture is prepared incorrectly or has deteriorated over time, then even such reliable tools as the Ural or Husqvarna 145 will not work

The instructions must indicate the proportions and special oil specifically for your chainsaw.

Another common problem is that the user fills the candle during startup. It needs to be inspected; if it is completely dry, then fuel is not passing into the cylinder.

If you see black carbon deposits or a lot of fuel, then the carburetor may not be properly regulating the fuel supply.

If your saw tool starts, but immediately stalls, then the problem needs to be looked for in the carburetor jet or fuel filter. Perhaps they are clogged.

To check if the breather is damaged, you need to disconnect the fuel hose from the carburetor and see if the fuel mixture leaks out of it.

If the saw does not start when hot, then the problem may be in the muffler. Sometimes it gets clogged from the exhaust itself.

Quite often, saw breakdowns occur due to a small amount of chain lubricant. This happens when the channels are clogged or the oil line is leaking.

Also inspect the connections of the pipes with the oil pump fittings to see if they are leaking.

It is very bad when a breakdown occurs in the cylinder. When examining it, you may find unevenness or chips, and this may be the cause of the problem.

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.

Ignition coil

The reason that a new chainsaw does not start, or starts poorly, may be the ignition coil. Modern chainsaws are equipped with electronic ignition coils. This part cannot be repaired, and, as a rule, if there is a defect, it is completely replaced.

Gap between ignition coil and flywheel

An incorrectly set gap between the flywheel and the ignition coil contacts affects the quality of spark formation, which in turn is responsible for normal starting and stable operation of the engine.

Why does a chainsaw stall under load?

In some cases, the chainsaw is unable to work normally when under load and simply stalls. A common reason for this behavior is improper carburetor adjustment, or air leakage through the crankshaft seals or carburetor gasket. This behavior can also occur due to a leak in the carburetor.

It is best to diagnose the cause and eliminate the fact that the chainsaw starts and stalls under load at a service center, since a special tool is needed to check the tightness of the carburetor and engine crankcase.

A saw that is unable to operate under load will also be unable to maintain idle speed. They will "float". Diagnostics begins with checking the crankcase and carburetor for leaks. If air leaks are detected through the crankshaft seals, they must be replaced. If air leaks are detected in the carburetor, the cause can be eliminated by installing a repair kit of gaskets.

Only after the above actions have not yielded results and the engine crankcase and carburetor are sealed, can you begin to adjust the carburetor.

The reason for this algorithm is as follows: if air leaks from the crankcase are not eliminated, but the carburetor was simply adjusted to ensure normal engine operation, then the fuel mixture will contain more fuel than is required with a sealed crankcase, which in turn will significantly increase its consumption. Also, most likely, carbon deposits will appear in the engine, which will also negatively affect the further operation of the chainsaw.

In some models of chainsaws, to ensure the operation of the fuel pump, special hoses are installed that transmit an air impulse from the engine crankcase to the carburetor fuel pump. If this hose becomes frayed, the saw will idle unevenly and will not operate at all under load.

Owners of household chainsaws HUSQVARNA 137 and HUSQVARNA 142, in case of any deviations in engine operation from the norm, should first check the pulse hose, since this is considered the most common cause of breakdown of these chainsaws.

A video showing how to replace a defective impulse hose on a HUSQVARNA 142 chainsaw with your own hands can be viewed below. It shows step-by-step the process of disassembling the saw, shows the impulse hose and outlines the consequences of its improper functioning HUSQVARNA 142.

Chainsaw doesn't start well when cold

Violation of the sequence of actions when starting on a cold

If a new chainsaw does not start when cold, the reason may be the incorrect engine starting sequence. As a rule, each manufacturer, in the instructions for the chainsaw, indicates the procedure for starting the chainsaw when cold. Basically, it is similar for all two-stroke internal combustion engines that are installed on chainsaws, and represents the following procedure.

Closing the air damper (necessary to enrich the fuel during startup).
Fuel suction using a special primer for this (on some models of chainsaws, the primer is not provided by the design, and therefore this item is not available for them).
Turning on the ignition (if you forget about this, you may mistakenly consider the tool to be faulty).
Carry out several movements of the starter until the first “flash” of the engine (it is important not to miss this moment, otherwise it is possible to “flood” the engine).
Set the air damper to the open position.
Start the chainsaw engine.

Fuel problems

As in the case of difficult starting when hot, problems in the fuel system can also affect starting or the inability to start even when cold. Carburetor adjustment, contamination of the fuel filter and line are all reasons that cause starting difficulties.

Carry out diagnostics of the fuel system, this is the first thing you need when it is difficult to start when cold.

It is worth paying attention to the quality of the fuel, because... When using a mixture of gasoline and oil that contains a small amount of water, starting may be significantly difficult or impossible.

The mixture must be used fairly fresh, because... When gasoline diluted with oil is stored for more than a month, its properties are lost and it becomes difficult to start, both on a cold and hot engine. For this reason, gasoline may burn poorly.

Engine faults

CPG scuffing, ring sticking, CPG wear, air leaks through seals and gaskets, decreased compression, all these problems can make starting a chainsaw impossible or significantly complicate it. For example, if the CPG wear is not significant, the compression in the engine decreases. In this case, starting “cold” will be significantly difficult, or the saw may stop, the tool will start well.

It is quite difficult to accurately diagnose problems in the engine associated with problems in starting it, and it is better to contact a specialist in this field.

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.

Video

The main reasons why the chainsaw does not start in the video. The video will be useful for those who quickly want to start a saw; the author gives practical advice.

If a situation arises when the chainsaw does not start, it is important to correctly diagnose it and determine the direction in which to look for the fault. You should not use a tool that does not idle, as this indicates that there is air leaking into the engine and can lead to serious problems. If you don’t have enough experience in repairing chainsaws, it’s better to contact a specialist who will save your time and nerves.

Problem with Stihl 250

The Shtil 250 chainsaw stood in the closet for about two years. Now it's hard to start. But when it starts, it stalls if you press the accelerator. The carburetor may have come to an end. the adjustments do not help. I drained the old gasoline and filled in new gas.

The carburetor membranes may have become stiff. You also need to look at the carburetor's impulse hole. Try, if possible, to disassemble the carburetor and soak all the membranes in gasoline for a day and all metal parts in acetone. Blow out the impulse hole and try replacing the spark plug.

Ex-Art-Kit thank you! I kept the saw all this time without draining the gasoline. Maybe the membranes are stuck together? Is it difficult to disassemble the carburetor? So it's not necessary to change the carburetor?

vik wrote: isn't it difficult to disassemble the carburetor?

It's harder to get to him

.There are usually 4 screws on the carb. 2 on the membrane and 2 on the filter gasket. Before you get into the carb, look at the spark plug and air filter. Based on the appearance of the spark plug, one can draw a conclusion about the condition of the carb: is the valve under the membrane stuck, or is the membrane itself out of order (lost elasticity, leaky)

vik wrote: isn't it difficult to disassemble the carburetor?

It's not difficult to take apart. It's more difficult to put everything back in the correct order. Be more careful and keep track of where everything was in the carb. Write it down just in case.

Here is a link to the pictures with the carb » > By the way, if you still don’t dare, go to Wald in St. Petersburg. Good service. Address on this site

I don’t know how to use a spark plug to determine whether the valve is sticking and the membrane is failing.

Ex-Art-Kit Dry or wet candles, these are of course indirect signs, but still

. If the membrane is damaged, the spark plug is usually dry, because no vacuum is created to open the valve (but here we must take into account pumping gasoline with a hand pump) A “frozen” membrane often, on the contrary, pours a lot of gasoline, which can even be seen through the air intake - the spark plug will be wet All this is IMHO, but it seems to be the same so far

Spark plug problem

A problem with spark plugs is one of the most common causes of chainsaw breakdowns!

This is one of the most common reasons why the engine stalls when cold. As a rule, its electrodes are covered with a layer of corrosion and carbon deposits, as a result of which the distance between their ends decreases - and there is ultimately no room for a spark to jump through.

The cause of corrosion and carbon deposits on the electrodes is uneven fuel supply, which is already a problem with the carburetor, which can be solved separately. There doesn’t have to be soot on the spark plug - there may be no spark because the fuel completely fills it when it’s hot, which also indicates problems with the carburetor.

The spark plug itself must be removed, dried and checked to see how the spark passes through it:

First, remove the wire and unscrew the spark plug.
Return the wire end to its original position.
Place the spark plug on the cylinder with the skirt.
Check for a spark by starting with the starter.

If there was a spark in this way, then you need to immediately move on to the problem with the carburetor. If not, then the spark plug must either be cleaned of rust and carbon deposits, or replaced. It is also possible that adjusting the distance between the electrode contacts will help.

Other reasons for the lack of spark include:

The final check for problems with the spark plugs can be completed with a number of simple procedures, after which the chainsaw should start:

Unscrew the spark plug and give it a full inspection.
Clean it from rust and deposits, dry it
Place the ends of the electrodes at the correct distance.
Drain all excess fuel from the engine of the tool so that the ignition compartment does not flood.
Place the spark plug back and try lighting again.

If these procedures helped and the saw began to work and the chain began to move, then you can work like this for about 5-30 minutes until the spark plug floods again

It is important to understand that this solution is temporary and just indicative. The main problem lies in the carburetor.

The question with him is ambiguous: in any case, it is necessary to adjust the fuel supply, but how to do this - yourself or with the help of a mechanic - is up to you.

When setting up the carburetor, be sure to use a tachometer, which will allow you to find out the number of engine revolutions with greater accuracy.

Based on them, you can already adjust its operating mode by adjusting the tightness of the screws on the carburetor block in several scenarios:

A complete inspection of the carburetor is necessary if it was not possible to determine a specific problem, but there is confidence that the jamming of the saw is associated with this particular part.

The audit is carried out as follows:

It is necessary to remove all communications (wires and hoses) from the device;
Carry out cleaning and purging. It is better to do this without removing the carburetor;
Remove the product and clean it a second time so that no traces of fuel or oil remain inside;
Gradually disassemble the device, guided by the drawing in the documentation or drawing up a diagram yourself;
All channels must be blown out with compressed air, and parts must be washed in an industrial solvent;
Give the parts at least 2 hours to dry;
Reassemble the carburetor, strictly following the instructions in the documents and diagram;
Connect back.

What to do if the chainsaw does not start

Breakdowns can occur even in the most expensive garden equipment. But if your chainsaw won't start, it doesn't mean it's time to buy a new one or pay for expensive repair services. Most of the problems associated with this problem are not global and can be easily fixed with your own hands. The main thing is to correctly determine the reason why the chainsaw refused to properly perform its functions.

Switching system design

A key role in any chainsaw is played by a two-stroke carburetor power unit. Its power directly depends on the chosen model and purpose. The second important mechanical unit in the device is the saw part, which consists of a bar, cutting chain and sprocket. The parameters of these components may vary.

Treatment with lubricating mixtures is carried out using special oil, which is poured into a specialized reservoir, which is located on the hand block. Separately, it should be noted that the volumes of the oil tank and fuel are calculated in such a way that their contents, as a rule, end at the same time.

Troubleshooting options and methods

Regardless of the brand of chainsaw - Champion, Husqvarna 236 or Patriot, the reasons for poor performance are identical. There are a lot of options why the Shtil chainsaw won’t start, but the most common are the following.

Chainsaw doesn't start well when cold

If the saw does not start well when cold, it means there is no compression. This occurs due to abrasion of the rings due to prolonged use. It turns out that when the user tries to start the Champion 137 in a cold state, the compression will not be enough to carry out this manipulation.

In this case, it is not recommended to systematically pull the handle. In the end, the unit will still start, but other mechanical components may break down. In this situation, you need to replace the worn rings with new ones.

Chainsaw won't start when hot

Here the reasons lie in engine flooding and wet spark plugs. Here's what to do in this situation:

move the air damper to the middle position;
Blow the component parts well;
start the device for 10 seconds;
switch to idle mode;
on a caliber chainsaw or another model, fully open the damper.

Next, simply start the engine at idle speed by pulling the handle. If the engine does not overheat, it will start easily.

If this troubleshooting option did not help, it means that the motor has already cooled down significantly. Fix the half-gas according to the recommendations from the instructions and repeat the operation.

You should also try turning the cold speed screw in a clockwise direction. The higher the rotation speed in the equipment, the easier it is to start it. You should know that the chain must remain stationary at idle.

VIDEO: Why the saw does not start or stalls and how to fix it

The chainsaw has difficulty starting and immediately stalls

In this situation, the cause is the filling of the spark plugs with gasoline at the moment when the user tried to turn on the unit. A small amount of fuel accumulates under the spark plug electrodes, which is why there is no spark in the equipment.

Removing the candle and drying it thoroughly will help solve the problem. In addition to these actions, you can additionally carry out heating. But this manipulation should be carried out exclusively using a gas burner. Otherwise, a small deposit may form in the area of the electrodes. After the spark plugs have completely dried, you need to drain off the excess fuel and leave the equipment itself to dry.

Chinese saw won't start

It should be noted right away that Chinese devices do not have any distinctive features from other analogues. They are just as reliable and productive, and also cost less. The only thing that is necessary individually for this device is to use only branded oil and fuel.

Most units do not work well with fuel from domestic manufacturers; gasoline clogs the channels and, as a result, fuel does not flow to the engine. Use fuel either of high quality or from the manufacturer of the saw itself.

VIDEO: How to properly adjust the carburetor so it doesn’t stall

Why doesn't the new saw work?

New equipment should not have problems with wear and tear on functioning mechanical parts, since the model has just left the assembly line. Such untidiness may arise if you purchase demonstration equipment that has been used more than once to advertise the company. The reason may also be improper operation of the unit, which does not comply with the recommendations from the instructions.

Husqvarna chainsaw repair diagram

First of all, you should check whether all the parts and components are installed in their places. Also, for example, Husqvarna will not start if it has been filled with a fuel mixture prepared without taking into account the required proportions.

But if all the recommendations are followed, every detail is carefully fixed in its place and the equipment was not purchased from a stand, the buyer probably received a defective device.

There is not enough fuel in the tank or it is of poor quality

This is one of the most common reasons. Users of gasoline vehicles, in order to save money, often use budget fuel. At first, the unit will perform its job properly, but the problem will certainly arise after a few months of operation.

It should also be remembered that fuel has an expiration date; it should not be stored in the tank for more than three weeks. Such a liquid, with constant contact with oxygen, quickly loses its octane number. This makes gasoline completely unsuitable for use.

Saw Shtil 250 won't start

Shtil 180 chainsaw won't start? Prerequisites and solution!

Today, the manufacturer Shtil occupies a leading position among other companies that produce equipment designed for agricultural and construction work. 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. The products of this manufacturer are famous not only for their highest level of properties, but also for their good pricing policy and the power of their models. This is one of the most recognizable global companies.

Surely, it is quite difficult to meet a person who does not have a chainsaw of this brand. But the fact is that out of 10 probable people, 6 people definitely have them. And this is not mind-blowing, because Stihl chainsaws represent power along with elegance of design. But unfortunately, such giants of technology also break down from time to time and require a certain kind of repair. Spark, quality, if the saw does not start when hot, the calm saw is quite durable. Now we will pay attention to one of the moths of this manufacturer, namely the Stihl 180 chainsaw. Read about the stihl ms 660 chainsaw here. So let's get started.

Content

Briefly about the main thing

This model is the pride of the German manufacturer and is a specific piece of equipment created for low-level work. It can be used for less than 20 hours every month. This beautiful device will easily help you take care of your garden, prepare firewood for the winter (see how to cut down a tree), clear areas, and will also be an indispensable assistant in other areas of, let’s say, easy manipulations.

We can say that these are mini-model chainsaws because they have a low weight, which is 3.9 kg , and they do not have a large tank, both oil and fuel. Repair of chainsaw Shtil ms 250. The saw does not start. The manufacturer has equipped this device with a two-stroke engine with sufficient power for light work.

Moreover, it is quite quiet because during operation the noise level does not exceed 98 dB. So to better understand the level of loudness itself, just compare its noise with conversational speech, which has an indicator of 76 dB.

The power of this model is 2.6 W. Why does the Stil 180 saw not develop speed? It's worth noting that this is a fairly significant level of power, considering that it is not a professional chainsaw. The oil tank has a volume of only 0.145 liters, and the fuel tank - 0.25 liters. The tire has a size of 350 mm and a pitch of 0.325 inches.

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 Shtil 180 chainsaw, we will not deviate from the topic. If the saw does not start after a long period of inactivity mac538. So. The carburetor in this model has a single adjustment screw , that is, it is a kind of idle speed adjustment screw. Why does the Stihl 180, 180 chainsaw not start and fill the spark plug? And I didn't drink. While the jet of the fully loaded load is stationary.

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Chainsaw carburetor Stihl 180

In simple terms, 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.

The saw does not start: reasons and solutions

First of all, it is worth noting the fact that the 180 chainsaw of this manufacturer is one of his best “creations”, but it also has its drawbacks. Actually, which we will talk about now.

the spark plug floods

Naturally, this problem can be solved, but given the design of this chainsaw, this will not be so easy, since you simply have to completely disassemble the device in order, as they say, to get to the right place. The video shows it more clearly:

Many people are concerned about this question: why does the Shtil 180 chainsaw not start? If you believe the experts, then in such a situation you need to first open and then close the cap located on the gas tank. Or take out and dry the candle. Or try to ventilate the combustion chamber. In most cases, this kind of manipulation is quite enough for the device to work. But there are times when the Shtil chainsaw does not start, but there is a spark...
In the above case, you need to directly check the gasoline supply , air filter and the immediate performance of the spark plug. Since the basis of this type of breakdown is the breather, namely its contamination. Because when it is completely clogged, a kind of vacuum appears in the gas tank itself, which simply interferes with the fuel supply process. Solving this issue is not difficult, since all you need to do is clean it using a needle.
There are also situations when the device basically started up, but immediately stalled .

The main reasons for this type of malfunction are the carburetor and filter, which could simply be clogged.

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In order to exclude the saloon from damaged objects, it is necessary first of all to disconnect the fuel hose from the carburetor itself and actually check whether fuel is leaking from it. You must remember that during proper operation of the chainsaw, gasoline must flow out in a dense and stable stream . It is also not uncommon for the Shtil 180 chainsaw to not start when hot and actually stall after switching on, or to hold power for a fairly short time.

In this case, the problem of breakdown lies precisely in the muffler, which can simply be clogged with any deposits that arise through the operation of the device and which settle during the exhaust process.

Also, a fairly common cause of tool malfunction is insufficient lubrication of the device chain itself . The reason for this may be channels that are simply clogged, or the reason is an oil line that is leaking.

Why does the chainsaw not start? First malfunctions

the saw won't start

how to start quickly.

Calm WILL NOT START, what should I do?

Even more information about repair and choosing tools on our website www.LookTool.Ru, come in, we welcome everyone

Chainsaw chain lubrication

Connecting pipes or the connections themselves in the area of the oil pump fittings may also leak.
It happens that the Shtil 180 chainsaw does not start well due to the cylinder, which may be broken. But to determine its condition, a visual inspection is sufficient. The saw works great and in general my saw (calm 180) saw stihl ms 180 does not produce oil. But if there you find the formation of irregularities and chips, then you can be sure that you have found the cause of the breakdown.
If through testing you find that the fault is in the spark plug, then you simply need to turn it out and then dry it directly. But it is worth noting that under no circumstances should you pierce it, as you will simply ruin the part and it will be unusable.
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. But what to do if there is a spark, why the saw does not start in the calm ms180 does not start. 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. The reasons why the saw does not start, why the chainsaw does not start. Further. The Stihl 180 chainsaw does not start: what can cause problems in the operation of the Stihl 180 chainsaw, how can they be eliminated. 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.
Also important is the concern of the owners of this model regarding the systematic idling after the first gasoline tanks are empty . But if you believe the experts in this field, they claim that this kind of situation does not pose any problem. But still, if this kind of process is repeated quite often, then you need to simply reduce the engine speed by using the carburetor screw.
In addition, you can clean the muffler , since the cause of the malfunction may be in it. This manipulation is not difficult.
A fairly common occurrence of poor-quality tool performance is the carburetor. 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.

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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. If you have carried out direct manipulation regarding checking and replacing the quality of the oil (see oil for the Shtil chainsaw), but, nevertheless, the chainsaw still refuses to start, then you need to continue your search.

But if you have fully carried out all the manipulations prescribed above and have not missed a single nuance, but still the tool has not yet been corrected, then in this case the problem lies in the group, which is called cylinder . 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.

To sum it up...

In fact, as you can see, there are quite a lot of reasons for the breakdown of the Shtil 180 chainsaw, and at the same time, there are also quite a few solutions to this problem. If you are faced with this situation, then simply follow all the recommendations written above and then, undoubtedly, you will be able to repair your device, and it will delight you with its work for many years to come.

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