The chainsaw does not start in the cold

The chainsaw won’t start: causes and remedies

There are cases that during construction work does not start the chainsaw what to do? This question is not unambiguously answered, since the two-stroke chainsaw engine requires four factors for reliable operation: fuel, spark, lubricant, and air. They provide:

  • The carburetor, which prepares the air-fuel mixture for engine operation;
  • spark plug and ignition unit;
  • A filter that cleans the air from dust, and a fuel filter;
  • the lubricating oils in the fuel.

Let’s start with the simplest and assess the quality of the fuel. It is best for each brand of chainsaw to prepare its own fuel mixture in a properly calculated proportion of high-quality gasoline and the brand of oil specified in the manual. The mixture should be ready for no more than two weeks, because gasoline loses its properties over time.

As for the spark, its absence can be due to both poor contact between the high-voltage wire and the tip of the spark plug (you should clean them of soot and fuel), or the failure of the plug itself. If the contact is good, but there is no spark, the culprit is the ignition unit, which should be replaced with a new one, it is not repairable.

It is not uncommon for the malfunction to occur if gasoline floods the spark plug at the moment of start. Having spare spark plugs in his tool kit, the saw owner, in order not to lose time, eliminates the problem by replacing the wet spark plug with a new one. You can send the old part to dry out by draining the excess fuel through the spark plug hole.

If the tool does not start in the cold, as the experts say in the cold, and the spark plug is wet, then in addition to the actions with the spark plug indicated above, it is necessary to observe the sequence of manipulations when starting the chainsaw in accordance with the instructions.

If the device does not start on hot, the cause of the problems may be the same faults in the ignition system. But if it is found that the spark occurs and the spark plug is dry, then the problem lies in the fuel system.

Methods of elimination are reduced to cleaning and checking the fuel filter and hose, the place of its connection to the carburetor (whether there is a leak and whether gasoline appeared in the air filter). When the repair or replacement of the fuel hose, cleaning the air filter did not help, you will have to remove the carburetor and repair it with the help of specialists.

Another sign of malfunction on a hot start: fuel leaking into the engine cylinder. A sign indicating this is a wet spark plug and the presence of a spark. This flooding of fuel may also be a consequence of a faulty carburetor or its improper adjustment.

chainsaw, does, start, cold

The chainsaw will not start. what to do

The first sign of improper operation, the manifestation of breakdowns becomes difficult to start the gasoline engine. Most often the cause of poor engine starting in the cold are problems with the ignition system. In this case, check the spark plugs and ignition coils. Spark plugs that have used up their service life can be defined by the dark color of the insulator, carbon deposits on the electrodes. Check the functionality of the unscrewed spark plug can be checked by attaching it to the high-voltage cap and the cylinder block. When you jerk the starter cord, you should get a blue spark. Additionally check the gap between the electronic ignition coil and the flywheel. Improperly aligned clearance interferes with normal spark formation.

Another reason why the chainsaw won’t start may be an unadjusted carburetor. If the carburettor is not correctly adjusted, the cylinders are fed with a lean or oversaturated gasoline mixture through the choke. In this case, it is also difficult to start the engine when it is hot. The same way the internal combustion engine reacts to cylinders filled with fuel-air mixture. Difficult start can also be caused by a clogged air filter.

A kind of bad start becomes a sudden stop of the engine. The two-stroke engine can stall due to problems with the carburetor, clogged filters, malfunctions of the fuel system. First of all, the fuel hose, connections to the tank and carburetor are inspected for gasoline leaks. The simplest reason for the engine to stop, typical for novice users, may be the lack of gasoline in the fuel tank.

Why the chainsaw does not start

First it is necessary to check the fuel level. If it is not enough, it is necessary to prepare a correct fuel mixture, which should include the petrol/oil ratio indicated in the instruction manual (oil brand is also indicated in the manual). For the preparation of the mixture it is correct to use gasoline AI-92. this will help to get rid of a lot of unnecessary problems. This amount of mixture should last for 1-2 weeks of chain saw work, i.e.к. Gasoline has a peculiarity to lose its octane properties.

The tool may not start because the spark plug fills up during start-up. If this is indeed the case, then to solve this problem, it is necessary to unscrew the primed plug and be sure to dry it (without burning it), drain the fuel trapped there from the plug hole and take a half-hour break. Then install either a dried spark plug or a spare spark plug. It is also important to pay attention to the contact between the tip of the spark plug and the high voltage wire.

Completely dry spark plug indicates that the fuel mixture does not flow, which means that there is some problem with the carburetor. First the fuel filter should be cleaned. If after eliminating all the existing dirt, nothing has changed, it is necessary to deal with the carburetor. However, its disassembly and cleaning is better left to experts in this business.

If you get a spark but the chainsaw won’t start, you’ll need to check the air filter and breather plug additionally. The air filter can be easily cleaned of dust. To check if the breather valve, which is responsible for equalizing the pressure in the tank, is blocked, unplug the fuel hose and check how the fuel flows out. If the flow is normal, the breather is fine. If there is no fuel or it flows very slowly, you should clean it.

See also  How to assemble a chainsaw starter spring. Repairing the starter mechanism

Your chain saw will not run on hot

In cases where the chainsaw does not start on hot, it is necessary to carry out a visual inspection of all major components of the chainsaw. The inspection should start with the spark plug. Check the spark, examine the electrode surface of the spark plug, these actions will help to determine the direction in which to look for the problem.

Trouble in the ignition system

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

How to fix a chainsaw that won’t start

Problems in the fuel system

If you find the spark and the spark plug is dry, it means that the problem is in the fuel system. You should start checking it 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. Start removing the carburetor only if the visual inspection did not identify the cause of failure.

A characteristic sign of a problem in the fuel system, it is an excessive amount of fuel in the engine cylinder. A typical sign of this is that the spark plug is very wet, and there is a spark on the spark plug pins. In this situation, turn the chainsaw upside down so that the spark plug hole is facing downward. If gasoline is leaking from the cylinder, then the reason the chainsaw will not start is because the engine is overfueled.

“Fills” with fuel, sometimes due to improper adjustment of the carburetor, or its malfunction.

With the process of adjusting the carburetor, you can get acquainted with the example of Champion 254 saw, watching a video instruction.

How to start the chainsaw correctly

Before you start the chain saw, you must fill it up with a fuel mix, mixed in certain proportions. The next steps vary depending on the model, but in general they are as follows. If there is a start-up lock it is removed and the saw brake is set in a non-operational state. Then the choke lever is pulled, the ignition button is pressed and the starter motor is jerked a few times until the engine emits a characteristic pop, indicating that it is working. Then the choke lever is moved to the middle position, and the starter motor continues to start until. After starting is complete, the choke slides in and the sawing process begins with the throttle trigger.

Why does the chain saw quit?

If the chainsaw starts and stops, the causes may be different. An external inspection should be made before attempting to repair the tool.

If the cut-off saw stalls, check the oil and gasoline mixture in the tank. If fuel mixture has run out, the machine will not work. In situations where there is still gasoline left, you should evaluate the quality of the tool before turning it off. If you hear unusual noises and have to stop suddenly afterward.

Formation of carbon deposits on the electrodes can also cause difficulties in the operation of the tool. The device should be inspected carefully, cleaned if necessary.

When pressing on the gas

If the chainsaw stops when you accelerate, check the muffler and fuel filter. Possible cause of malfunction is a leak in the fuel hoses. In some cases adding revolutions helps.

Sometimes checking all the parts fails, the tool suffocates, stalls when adding gas. If the appliance stalls when a person presses the gas, it is possible that the fuel supply is insufficient to work properly. This is caused by a clogged carburetor or filter.

The breakdown may also occur due to clogging of the air filter with dust. When you give gas, the device stops working. It is not worth troubleshooting on your own, because each model has individual characteristics.

Insufficient or no lubrication in chainsaw chain can cause a problem. If the chain is dry, you should clean the ducts through which the oil flows to the bar. If the oil leaks, cracks, defects on the pipes, you need to treat them with sealant.

Under load

In situations where the device stalls on load, the problem may be with the gas tank or filters. Check the fuel and change the filter.

Often the fuel system doesn’t rev up because the fuel in the fuel tank has a low octane rating. Not enough power, not enough warm-up, chainsaw stops under load.

Often, component failures cause the unit to stall under load. Check for leaks in hoses, seals, and gaskets. If parts are faulty, you can try to repair or replace them.

In cases where the chainsaw starts and immediately shuts down, there is not enough fuel, the unit does not heat up. The unit should be refueled. It is important to use the proper mixture. Different models are better suited to different fuels. You should read the manual, customer service recommendations and other testimonials from people who have found the saw to be working properly.

At idle

In situations where a chainsaw cuts out at idle speed, the condition of the muffler needs to be checked. If the part is dirty, the exhaust gases are poorly exhausted, the engine can not continue to run, stops.

The saw stops when idling and in cases where the carburetor is not properly set. For beginners, it is better to entrust the repair to specialists, as there is a possibility of improper adjustment, due to which the tool will not be able to work. A tachometer is needed to adjust the carburetor.

At high rpm

If the device stalls at high revs, check the condition of the petrol and air filters, the condition of the fuel hoses.

A dirty air filter may be washed under warm running water. It is important to dry the part thoroughly before installing it so that water does not impair the function of the tool.

Why won’t this Echo chainsaw start or run? Diagnose it first.

If liquid stops flowing through the fuel hose, it is clogged. You can clean the part or replace it with a new one.

If you have a high-speed cut-off, but all the fluid is coming through the hose, and the air filter is clean and working properly, look for the problem in the fuel filter. Replace it with a new one or clean it.

In some cases the problem is in the gasoline pump. If the component is worn, fuel begins to leak through the walls. If this phenomenon is noted, a new pump should be installed.

See also  Changing the fuel filter on the STIHL 180 chain saw

When tilted

If the saw fails to rev up when tilted, shuts down, stops working, check the fuel level in the tank. If it is not too high, in a tilted position, the device is not supplied with enough fuel, because the fuel pipe is above the level of mixture.

All tools, both zabugornye (Husqvarna, Makita, STIHL, Partner 350), and Chinese chain saws, and Russian (Druzhba, Ural), are designed identically. To find the reason why the machine doesn’t start and stops is not difficult.

There are four elements in which difficulties occur:

  • Fuel, for which the carburetor is responsible;
  • Lubricant;
  • The air that comes in through the air filter;
  • The spark, the quality of the busy is dependent on the ignition unit.

They all depend on and interact with each other. If any element is malfunctioning, the saw stops working.

The first question left for our customer is what tools start differently. hot to cool. Two often-used mechanisms are responsible for this process.

Always read what is written in the user manual. There it is marked that at switching on it is necessary to be convinced that the brake of a critical stop is fixed. But it is much more difficult to start the saw with a brake, so, from time to time, it is better not to put the brake on.

You can find out from the manual, inside of the body there are fuel tank and engine, and outside. saw part (guide bar with chain), handle and starter.

At first it is necessary to understand how exactly the tool doesn’t start. For example, the saw starts, but immediately stops, or loses power to work, the quality of the cut.

You don’t get much work done because of problems with the engine. But I would not recommend that you disassemble it immediately. It is better to find the problem with the most common variant.

A chainsaw is a useful tool for homeowners and construction professionals. It’s a shame if it stops working properly! When a chainsaw won’t start, it can lead to difficulty with specific projects and cost extra money. It is important to find an answer to the question of why a chainsaw does not start well, to learn about possible solutions.

Sometimes a chainsaw’s poor performance is a sign that it’s time to decide to buy a new one. Tool owners often feel it’s worth investing in a new chainsaw rather than paying for costly repairs. But there are several possible reasons why a chainsaw does not start well in the cold. The possible cause can be checked and eliminated on your own. Sometimes all it takes is replacing the defective parts.

Check the fuel tank

Checking the tank is something that many people do when a chainsaw malfunctions. At the same time, this is a factor that many, do not take into account when bad work of the tool. Fuel can go bad. After storing the saw for two weeks with a full tank, there is a high chance of starting problems.

Sometimes it’s enough to drain the tank and use new fuel. It is worth checking the fuel mixture. Different fuel mixtures are appropriate for engine types. Most two-stroke engines run using a mixture of oil and gasoline in the tank to ensure proper lubrication. It is worth avoiding the use of car oil, any gas mixed with methanol or ethanol, as it can damage the engine.

We recommend checking our information if the gasoline is not flowing into the chainsaw. In the article reasons and basic solutions.

Spark plugs

The spark is responsible for initiating combustion in the cylinder, where the air-fuel mixture ignites. Often in most chainsaw models, spark plugs suffer over time due to wear and tear. To make sure that the plug produces a spark, you must first remove it, then using the plug wire, you need to touch the metal part of the engine and observe how the electrodes form a spark. Sometimes a cleaning with a steel brush is enough to gently remove the corrosion. If the problem persists after that, you need to install new spark plugs.

The ignition coil

A faulty ignition coil can also be the culprit for a chainsaw not working properly. The coil sends voltage to the spark plug during operation. If you have the same starting problems after cleaning the spark plugs or replacing them, the ignition coil may be the culprit. You need to use an ignition coil sensor to determine the malfunction.

Problem with the starter

The starter assembly consists of several elements that start the engine when the chainsaw is turned on. This is the starter pulley and rewind spring. There are a number of problems that can occur with each of these elements. If the spring is not working properly, the starter rope cannot bounce on the pulley, making the chainsaw difficult or impossible to start. You can change the springs or replace the starter completely, which is sometimes much easier.

Clogged carburetor

Leaving fuel in the tank for too long can ruin the carburetor. When the light fuel elements evaporate, a dense substance is left behind that will lead to clogging. The solution is to carefully clean the carburetor with a special cleaner. If cleaning doesn’t help, the carburetor may need to be replaced.

Dirty air filters

Chainsaws often won’t start because of clogged air filters. Clogged and dirty air filters consume more fuel, similar to how the throttle works. Starting a saw with clogged air filters increases carbon buildup. Since the engine uses a lot of unburned fuel. Carbon buildup can form as a result of frequent engine idling. After having used the chainsaw for 5 hours, you must remove the air filter and clean it with water and detergent. Before you put it back in.

Finding the Reason a chainsaw won’t start

Amateur and professional chainsaws are complex machines. The service life of their two-stroke engines, components and assemblies has its limits. For this reason, quite reliable and expensive tools, along with cheap Chinese units, periodically fail and refuse to start. The situation when a chainsaw won’t start or stops is not very pleasant and sometimes puts the user at a loss. How to determine and fix the problem, restoring the functionality of the tool.

Why a chain saw cuts off when not in use

Sometimes the chainsaw is unable to operate normally when under load. Most often it is caused by improperly adjusted or leaking carburetor. Also, this problem may be caused by air leaks through the carburetor gasket or crankshaft oil seals. A tool that is unable to operate under load is also unable to hold idle speed reliably.

Diagnostics begins with checking the carburetor and crankcase for leaks. In case of detecting air leakage through the crankshaft oil seals, they need to be replaced. If an air leak is detected in the carburetor, the problem requires the installation of a repair set of gaskets.

If these actions have not led to the desired result and the engine carburetor and carburetor are sealed, it is necessary to adjust the carburetor.

If your Husqvarna chain saw cuts out under load, then first of all it is necessary to check the impulse hose, because it is the most common reason of this chain saw malfunction.

See also  How to adjust the stihl chainsaw. Repair of the chainsaw STIHL MS-180 with your own hands.

Engine assembly

The first and almost basic element of a chainsaw is the engine, namely a carbureted two-stroke (see. carburetor adjustment). Its direct power varies, it all depends on the model of the device and its direct purpose. So, for example, the power of a chainsaw Ural is 3.68 kW.

Chainsaw Won’t Start 3 Reasons Why

The second no less important part of the tool is a set (saw) which consists of a chain (cutting), bar, sprocket, wheel (chain). It is worth adding that absolutely different manufacturers provide their own specific range of this headset.

It is important that it is always necessary to pick up directly certain engine performance data. as the bigger step has such kind of chain, the deeper the cut of chainsaw will be, we can even say that the more powerful and productive it will be. But do not forget that to work properly the engine also should not yield to it in power.

It is lubricated by means of a special oil directly from the tank of the second, which is located on the hand unit. It is worth noting that the mass of this kind of tank has such features that the oil and fuel, which is designed for the engine ends at the same time.

In general outline with the device figured out, but most likely with its basis, and now it’s time to start to understand why the chainsaw has stopped working, what could be the reason and how to fix it.

Why the chainsaw stops when you give throttle?

There could be even more reasons for this than in the previous cases. Let’s look at the main ones.

  • Poor fuel or oil quality or miscalculation of the volumetric parts of the mixture as required by the owner’s manual;
  • Unexpected spark plug flooding after idle start. To restart, the fuel surplus is drained and the spark plug is removed from the unit and dried. Only after this you can initiate the start of the unit again;
  • Also chain saw starts normally but stops on adding gas because the spark may be lost. This usually occurs when there is poor mating between the wire and the spark plug tip, or there are significant defects in the ignition elements.
  • Not enough fuel or inadequate fuel supply (dust particles clogging the air filter or breather).
  • Muffler has become contaminated and needs urgent cleaning.
  • Malfunctions in the cylinder piston system.
  • Problem with lubrication system. Lube may be simply missing or the oil filter and conductive tubes may be clogged with debris. They are subject to heavy wear and tear, so you should always check the lubricant lines and connections for continuity before you start working with a power tool.

The effects of running with too much or too little fuel

The brown color of the insulator and the absence of any traces of carbon deposits are the proof of the normal 16:1 ratio of the air-fuel mixture.

What to do if the chain saw won’t start any more?

If the initial inspection did not give anything or defects were eliminated during the search, and the chainsaw and further does not start, then you need to look for more serious reasons. It is better to find out and eliminate such malfunctions in the service center. However, with experience, you can find and fix them yourself. What to diagnose and check?

In the first case, checking the compression in the cylinder will allow to find out the state of the cylinder and piston group (BCG) of the chain saw, which does not want to start in the cold. You will need a compressometer for this. The device is screwed in place of the spark plug and the engine is idled. Measuring the readings allows you to judge the condition of the cylinder head. In the absence of a compressometer to determine the compression in the cylinder can be at a glance as follows:

Putting a finger to the spark plug hole and twitching the starter, you can check the compression in the cylinder

If you feel that the finger is pulling hard into the spark plug passage, there is nothing wrong with the compression. If there is no vacuum in the compression chamber, this is a sign of malfunction. The cylinder-piston group needs a more detailed inspection which will give an indication of the condition of the piston and cylinder, piston rings and bearings.

Not start the chainsaw in the cold can also due to lack of compression in the crankcase. The main reason for this is damage to the gasket placed between the cylinder and the crankcase. Detecting the lack of compression is quite easy:

  • Disconnect the upper tube from the carburetor;
  • Pour petrol into an ordinary cap;
  • We dip the removed tube into the fuel;
  • Pull the starter a few times.

If fuel is sucked out of the cap when you start the chain saw starter, then there is nothing wrong with the compression. If not, check the gasket.

If the fuel retracts, everything is fine. the gasket is intact. Otherwise you will have to buy a repair kit and make a replacement. How to do it see the video, why the Chinese chainsaw does not start:

Starting the tool can be complicated by improper operation of the carburetor or its failure. It is often the case that during sawing the fastening screws come loose and air is sucked into the cylinder. Check that the carburetor is securely fastened. Inspect it for fuel leaks. There could be many reasons. It is possible to accurately determine the malfunction, fix it and make fine adjustments to the carburetor only in the service center.

By going through the step-by-step defectology of a chainsaw engine, you will be able to find the fault, fix it yourself and successfully start your working tool. Do not start with jobs you are not sure about. You can leave troubleshooting at your local STIHL servicing center.

STIHL saw winding mechanism

The mainstay of this and all other STIHL chain saws is the carburettor. But since we are specifically talking about the STIHL 180 chainsaw today, we won’t stray too far from the topic. So. The carburetor in this model has a single adjusting screw, that is a kind of adjustment screw of idle stroke. While the nozzle of the fully loaded carburetor is in a stationary state.

In simple terms, it simply can’t be adjusted (see “Adjustment” on page 54). The STIHL STIHL STIHL 180 Series saw is equipped with a crown winding screw. It is important that the carburetor at the factory has been adjusted so that regardless of actually what conditions are made direct exploitation of gasoline saws air-fuel mixture is supplied to the engine itself.

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