A chain saw does not start well in the cold
Why does not start on a hot?
Until we begin to solve this difficulty it is necessary to say that the productive and faithful work of the engine depends first on the rate of implementation of the starter mechanism. In the main part of the models This minimum level is 800 rpm. It is important to note that the main reason that the chainsaw doesn’t start is the commonplace priming of the engine.
To remove this problem, you must first put the damper (air) in the middle position. After that, blow the chainsaw several times. When the process has started, warm it up for about 10 seconds and then put it into run (idle) mode. After performing these manipulations will be able to fully open the (air) flap.
After that, it should be noted that while to start a specific action on the prescribed recommendations try to make start the device specifically in the idle position. For this purpose just pull the rope. Because in this case, if the engine is not hot, the start will be made without any troubles.
If you can’t get anything out of it that means it’s gotten pretty cold. Then fix the half throttle in accordance with the instructions in the manual that came with your chainsaw.
If all of this does not help, under such circumstances, you should perform a specific cranking of the cool down screw, specifically clockwise.
Top Reasons Chainsaw Won’t Start — Chainsaw Troubleshooting
Remember that the easier it will be for you to start the device, the easier it will be for you to start the device. Don’t forget that the chain relative to the cool stroke must become immobile.
The main reasons why the chainsaw does not start on the video. The video will be useful to those who quickly want to start the saw, the author gives sensible advice.
If the situation arises, when the chainsaw does not start, it is important to correctly diagnose the problem, to determine the direction in which to look for faults. Do not use the tool, which does not work at idle, as this indicates the presence of air suction in the engine and can lead to serious problems. If you do not have enough experience in the repair of chain saws, it is better to contact a specialist who will save your time and nerves.
What to do if the chain saw will not start
Good afternoon, dear readers and subscribers to my blog! At some inopportune moment you may find that your chainsaw
does not start. But do not rush to take the tool for repair immediately, you may be able to fix the breakdown yourself. I will show you what to do when a chainsaw won’t start and how to find the right solution.
Not starting the chainsaw: causes and remedies
Among the malfunctions responsible for starting the mechanism, we can distinguish simple. when recovery does not require specific knowledge, and complex. when repair requires an engine or carburetor. Troubleshooting simple problems, in 90% of cases, is limited to cleaning or replacing easily accessible components. complex breakdowns may require almost complete disassembly of key components of the system, followed by the replacement of damaged elements.
If the tool has been operated carefully and according to the manufacturer’s requirements, there is a high probability of a minor malfunction. A banal lack of fuel in the tank, a violation of the starting sequence, lack of spark, clogging of filters and breather and similar problems that usually do not start the chainsaw. Reasons and nuances of the solution are briefly described in the following list (more details below):
Lack of fuel may seem the most obvious reason for refusal to start, but cases of referral to the service about this occasionally occur. It seems that there is enough gasoline in the tank, but the filter on the fuel hose does not allow the carburetor to suck it up practically from the bottom. In such a case, you should simply fill the tool up at least by half.
The right sequence of actions before starting, makes the starting procedure much easier. Algorithm violation can not only make starting difficult but even impossible. The process should be as follows: 3-4 presses on the primer to supply fuel to the carburetor, closing the choke (lever on itself) and several steady rotations of the starter until the chainsaw starts for a split second, then stalls. Then it’s just a matter of opening the choke, starting the engine, and you’re good to go.
Lack of spark could be caused by a faulty spark plug or ignition system. The spark plug may be dirty or deformed, which can be solved by cleaning, easy repair or replacement. The problem with the ignition system may be due to incorrect clearance between the flywheel and coil, the gap between which should not exceed 0.35 mm. If the adjustment does not help, the system should be replaced.
Clogged filters (air and fuel filter) limit the flow of substances that are vital for the engine, making it impossible to start or reducing its efficiency. On a new saw this problem will not occur and these items should be checked after extended use. The fuel filter is mounted on a hose in the tank and the air filter on the carburettor.
The fuel filler nozzle is designed to stabilize pressure by replacing the need for air with a smaller volume of gasoline. If the breather is clogged, the gas tank will become airtight and pumping out the gasoline will create a vacuum in it. When the pressure threshold is reached, the carburetor will not be able to suck fuel and deliver it into the cylinder. If air is sucked in sharply when the tank cap is unscrewed, then the breather plug is clogged and needs to be cleaned.
Top 5 Reasons A Chainsaw Won’t Start
If there is soot on the exhaust valve or muffler, it can prevent exhaust gases from escaping when the engine is running. In this case the chainsaw may choke immediately after starting or it may not start at all. The problem occurs after the tool has been used for a long time and can be solved by cleaning the holes.
serious faults are related to the carburetor and engine. Repair of these elements requires a certain experience, and a person with minimal knowledge of the work of the internal combustion engine for it is better not to take. Independently it is possible to adjust the carburetor, check compression and replace the diaphragm (about this in detail below), but a complete replacement of the cylinder head is better to trust a specialist.
The key role in any chainsaw is played by a carbureted two-stroke power unit. Its power depends directly on the chosen model and purpose. The second important mechanical unit in the device is considered the saw part, which consists of the bar, the cutting chain and the chain wheel. The parameters of these components can vary.
Lubricating mixtures are treated with a special oil, which is poured into a specialized reservoir, it is located on the hand unit. Separately, it should be highlighted that the volumes of the oil tank and fuel tank are calculated in such a way that their contents, as a rule, ends at the same time.
Failure modes and troubleshooting
Regardless of the brand of chainsaw. Champion, Husqvarna 236 or Patriot, the causes of poor performance are identical. There are lots of variations in why a STIHL chain saw does not start, but the most common are.
A chain saw does not start well when cold
If the saw does not start well when cold, it means that there is no compression in it. This is caused by ring wear and tear from prolonged use. It turns out that when the user tries to start Champion 137 in a cold state, the compression to perform this manipulation will not be enough.
In such a case, it is not recommended to systematically jerk the handle. In the end, the unit will still start, but other mechanical components may break down. In this situation, replace the worn rings with new ones.
The chainsaw won’t start when hot
Here the reasons lie in the flooding of the engine and wetting of the spark plugs. Here is what to do in such a situation:
- move the air damper to the middle position;
- Blow out the constituent parts well;
- start the machine for 10 seconds;
- set it to idle mode;
- On the chainsaw Kalibr or other model, fully open the flap.
Next, simply run the engine at idle speed by pulling the handle. If the engine is not overheated, it will start with ease.
If this option of troubleshooting did not help, it means that the engine has already cooled down a lot. Fix the half throttle according to the recommendations in the manual and repeat the operation.
You should also try to turn the idle speed screw in a clockwise direction. The higher will be the speed of rotation in the equipment, the easier it is to start. Be aware that the circuit, when idling, should remain in a stationary position.
Your chain saw does not start right away and shuts down
This is caused by the plugs being filled with gasoline when the user tries to start the machine. A small amount of fuel accumulates under the spark plug electrodes, due to which there is no spark in the equipment.
The problem can be solved by removing the spark plug and drying it thoroughly. In addition to these actions, you can additionally carry out glowing. But this manipulation should be done only with a gas burner. In the other case, there may be a small amount of soot in the area of the electrodes. After complete drying of the plugs, you need to drain the excess fuel and leave the equipment itself to dry.
The Chinese saw does not start
It should be noted right away that Chinese machines do not have any distinctive features from other counterparts. They are just as reliable and productive, and cost less. The only thing that is necessary individually for this unit is to use only branded oil and fuel.
Most units do not work well on the fuel of domestic producers, gasoline clogs the channels and as a result the fuel does not come to the motor. Use either high quality fuel or from the manufacturer of the saw itself.
Why the new saw does not work
New equipment should not have problems with wear and tear of functioning mechanical parts, since the model has only come out of the conveyor. Such untidiness can occur in the case of demonstration machines which have been used more than once to promote the company. It can also be caused by improper use of the unit, which does not meet the recommendations from the manual.
First of all you should check whether all parts and components are installed in their places. Also, for example, Husqvarna will not start if it was filled with a fuel mixture that was not prepared in the correct proportions.
But if all the recommendations are followed, each detail is carefully fixed in its place and the equipment was not purchased from a test bench, it is likely that the buyer got a defective device.
The fuel in the tank is insufficient or of poor quality
This is one of the most common causes. Gasoline equipment users, in order to save money, often use cheap fuel. At first the unit will perform its work properly, but the problem is bound to occur after a few months of operation.
Also remember that fuel has an expiration date, it must not be stored in the tank for more than three weeks. Such fluid quickly loses its octane rating in constant contact with oxygen. This makes the gasoline completely unsuitable for use.
Contaminated filters are one of the main factors of the chainsaw not starting. Check for cleanliness of the air filter, it is located under the body-cap. The fuel filter is located directly in the fuel tank.
Air filter and spark plug location
Above all, the breather plug in the tank should be checked. To diagnose it, remove any possibly clogged parts for a while, start the unit without them.
How to “run in” a chainsaw correctly
To make sure your new apparatus runs properly, it needs a proper running-in period.
- First you need to prepare a fuel mixture, the proportions of which depend on the power:
- For engines up to 5,000 rpm the optimal proportions of oil and gasoline are 1:25;
- for engines with speed up to 120,000 rpm the oil to gasoline ratio is different. 1:50.
- Pour it into the fuel tank and turn on the saw at medium power.
- You give 4-5 minutes to work, then 15-20 seconds of idling, and so on, until the fuel runs out.
- In such a mode start 5-10 cycles, after which you can proceed to the full work at full power.
When it is necessary to refill the tool, it is necessary to wait for it to cool down completely. Never fill the fuel tank while the engine is hot. it could cause serious injury. And always refuel away from flammable objects.
Some models have two separate chainsaw tanks. for gasoline and for oil, in the process of operation the components are mixed together in the correct proportions. Before refueling make sure exactly what type of fuel you have, so that you do not have too much oil.
What the wrong choice of fuel leads to
The correct operation depends on the quality of fuel and oil, as well as on the correct proportion of components. If you make a mistake, it leads to a number of problems. In the best case the unit simply will not start, in the worst case it fails, and this does not fall under the warranty repair.
Why the chainsaw will not start in the cold. Why the chainsaw won’t start
If defects occur, it is necessary to check the serviceability of the components.
If the new chainsaw does not start, you should check the presence and supply of fuel, the spark on the spark plug, the functioning of the exhaust valve, the state of the filters. Can be violated and the work built into the fuel cap glocking saloon device.
The reason that the Chinese chain saw does not start, may be low-quality equipment. There may be a variety of faults, improper assembly. Some products arrive defective. If inspection shows no faults that can be repaired yourself, you can replace the saw under the warranty card.
The reason why the device does not start in the cold, often turns out to be a violation of the sequence of starting the engine.
Read the manual: the manufacturers indicate how to start the chain saw correctly.
To enrich the fuel, first close the choke. After that, the fuel is sucked. A special primer is used for this. Then switch on the ignition. Before the first engine flash, it is necessary to make several movements of the starter. The flap is opened, the device is started. If the sequence is broken, any step is skipped, it may not work properly.
If the chain saw does not start, there is probably a problem with the fuel system. Starting problems can be caused by an improperly adjusted carburetor, a clogged fuel line and fuel filter. The quality of the fuel also matters. If the fuel is diluted with water, the unit does not start well or does not work at all. The mixture must be fresh.
Possible cause of trouble starting is an engine malfunction. Wear or breakage of the part leads to undesirable consequences: reduction of compression in the cylinders and other troubles. With such problems, it is recommended to contact specialists, because it is difficult to diagnose and fix the failure yourself.
If the chainsaw does not start badly on hot, you should start the inspection of the tool with the spark plug. You will also need to check the spark plug.
The spark plug must be dry for it to work properly. When it is wet, no sparks appear on the contacts. You could try replacing the part with a new one.
If the spark is there and the spark plug is good, try to look for a problem in the fuel system. If a visual inspection can not find the cause of the failure, you should remove the carburetor. If the amount of fuel exceeds the allowable amount, the unit will not work. The spark plug should be wet. It is necessary to turn the spark plug hole downwards. If fuel mixture is leaking, excessive fuel will be the reason why the chain saw does not start on hot.
What to do
If the chainsaw engine won’t start and there are traces of fuel and oil on the electrodes of the spark plug, it is necessary to determine the cause. This will determine what you need to do to fix it. If fuel is thrown when starting the machine, it is necessary to remove the fuel mixture that has accumulated in the engine crankcase. To do this, unscrew the spark plug, turn the chainsaw cylinder down and turn the crankshaft with the hand starter. Such manipulations should be done at least 25-30 times.
After that, the removed part is reinstalled and the engine is started in accordance with the instruction manual. If there are interruptions in the process of operation of the machine, this indicates a defect in the spark plug. Over time, the electrodes of the spark generator burn out, resulting in an increased gap between them. That leads to a weak spark that can’t ignite the fuel.
Unburned fuel is deposited on the electrodes and the spark formation stops.
Chainsaw Won’t Start (Easily Fixed) Must See!
Gap adjustment is done with a feeler gauge. For two-stroke engines, the distance between the electrodes should be 0.7. 0.9 mm. The fuel may be spilt on the machine’s contacts because the mixture is too enriched. This can be caused by improper carburetor adjustment or clogging of the air filter.
The machine is adjusted with the engine warmed up. Turn the screws to achieve the highest possible rpm stability. If the owner of the unit did not adjust the carburetor, then it is worth contacting a specialist.
Why the Husqvarna chain saw does not start. why?
The carbureted, two-stroke power unit is the key to any chainsaw. Its power is directly related to the chosen model and intended use. The second important mechanical component of the device is the saw part, which consists of the bar, the cutting chain and the toothed wheel. The parameters of these components may vary.
It is treated with a special oil, which is poured into a specialized container located on the handheld unit. Separately, it is worth noting that the volume of the oil tank and fuel tank are calculated so that their contents, as a rule, run out at the same time.
Troubleshooting options and methods of elimination
Regardless of the brand of Champion, Husqvarna 236 or Patriot chainsaw, the causes of poor performance are identical. There are many variations of why a Calm chainsaw won’t start, but the most common are.
A chain saw does not start well when cold
If the saw does not start well when it is cold it means that there is no compression in the saw. This is due to ring abrasion due to prolonged use. It appears that when the user tries to start the Champion 137 cold start, there is not enough compression for this manipulation.
In this case, it is not recommended to systematically pull the handle. Eventually, the device will still boot, but other mechanical components may break. In this situation it is necessary to replace the worn rings with new ones.
The chainsaw will not start when hot
Here the causes lie in the priming of the engine and wet spark plugs. Here is what to do in this situation:
- Blow out the components well;
- start the device for 10 seconds;
- go into standby mode;
- Move the air damper to the center position;
- On a caliber or other chainsaw, open the choke completely.
Then start the engine at idle by pulling the handle. If the engine does not overheat, it will start easily.
If this variant of troubleshooting has not helped, it means that the engine has already cooled down a lot. Secure the half throttle as instructed and repeat the operation.
You should also try turning the cold cutting screw clockwise. The higher the speed of the equipment, the easier it will be to start. You should know that the inactive chain must remain stationary.
A stuck engine is easily detected by pulling on the starter cord. In the case if the starter does not spin, most likely it is jammed and further repair is possible only in the service center.
Broken fuel line
When the chain saw is running, vibrations occur and can cause damage or break the chain saw’s fuel line. In this case, the chainsaw will freeze and it will be impossible to start it. To diagnose a malfunction, you must inspect and determine if there are fuel leaks.
Overheating while the engine is running could cause the chain saw to stop, but not to start. Overheating is quite dangerous, because it can lead to the melting of the piston in the cylinder and jamming of the engine. In the first cases of overheating, it is worthwhile to diagnose the tool for the presence of extraneous air intake into the engine and adjust the carburetor.
Air leaks and improper carburetor adjustment affect the maximum engine speed and lubrication, which in turn leads to overheating and jamming of the tool.
When cleaning the walls of the exhaust duct it is necessary to cover the cylinder opening with a rag. This will eliminate the possibility of dust and sand in the cylinder. After cleaning the muffler and the chainsaw exhaust duct, you can proceed to start the engine of the tool. In this case, you will feel the chainsaw will work at full power.
Why the chainsaw will not start
Some of the breakdowns can not be done without bringing in specialists. Well, and minor repairs to the chainsaw, such as refusal to start, you can try to fix it yourself. I’m sure you have faced the problem that the chain saw stops after 10 minutes of work. So, there is a solution to this problem.
Husqvarna 142 chain saw repair with your own hands video
The key role in any chainsaw is played by a carburetor power unit of two-stroke type. Its power directly depends on the chosen model and purpose. The second important mechanical component in the device is considered the saw part, which consists of the bar, the cutting chain and the chain wheel. The parameters of these components can vary.
Treatment with lubricating compounds is carried out with a special oil, which is poured into a specialized tank, it is located on the hand unit. It should be separately noted that the volumes of oil and fuel tanks are calculated in such a way that their content is usually finished at the same time.
Fault options and troubleshooting methods
Regardless of the brand of chainsaw. Champion, Husqvarna 236 or Patriot, the causes of poor performance are identical. There are many variations in why the STIHL chain saw does not start, but the most common are.
The chainsaw does not start well in the cold
If the saw does not start well when cold, it means there is no compression in the saw. This is due to ring wear and tear from prolonged use. it turns out that when the user tries to start the Champion 137 in cold condition, there will not be enough compression to perform this manipulation.
In that case, do not pull the handle systematically. In the end, the unit will still start, but it may break other mechanical components. In this situation, you need to replace the worn rings with new ones.
The chainsaw does not start on hot
Here the causes lie in the engine priming and wetting of the plugs. Here’s what to do in such a situation:
- Move the air damper to the middle position;
- Blow out the constituent parts well;
- start the machine for 10 seconds;
- Switch to the idle mode of operation;
- On a Kalibr or other model of chain saw, open the choke completely.
Next, simply idle the engine by pulling the knob. If the engine is not overheated, it will start easily.
If this troubleshooting option did not help, it means that the engine has already cooled down a lot. Fix the half throttle according to the recommendations in the manual and repeat the operation.
You should also try to crank the cold run screw in the direction of clockwise movement. The higher the speed of rotation in the equipment, the easier it is to start it. You should know that the chain should remain stationary when idling.
The chainsaw would not start and immediately shut down
In this situation the cause is that the spark plugs are flooded with gasoline when the user tries to start the machine. A small amount of fuel is trapped under the spark plug electrodes and this causes no spark in the equipment.
The problem can be solved by removing the plug and drying it thoroughly. In addition to these actions, you can carry out additional heating. But this manipulation should only be done with a gas burner. Otherwise, a small amount of soot may form in the area of the electrodes. After the spark plugs are completely dry you need to drain the excess fuel and leave the equipment to dry.
The Chinese saw does not start
It should be noted right away that Chinese machines do not have any distinctive features from other analogs. They are just as reliable and productive, and 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 on domestic fuel, gasoline clogs the channels and as a result, the fuel does not come to the motor. Use high-quality fuel or fuel from the manufacturer of the chainsaw.
Why the new saw doesn’t work
New equipment should not have problems with wear and tear of functioning mechanical parts, since the model has only come out of the assembly line. Such untidiness may occur in the case of purchase of demonstration equipment, which has been used more than once for advertising the company. It can also be caused by improper use of the machine, which does not comply with the recommendations in the manual.
The first thing to do is to check whether all the parts and components are in place. Also, for example, the Husqvarna will not start if it has been filled with a fuel mixture that has not been prepared in the correct proportions.
But if all the recommendations have been followed, each detail is carefully fixed in its place and the equipment has not been purchased from a test bench, it is likely that the buyer got a defective device.
The fuel in the tank is insufficient or of poor quality
This is one of the most common causes. Users of gasoline equipment, in order to save money, often use budget fuel. At first, the unit will work properly, but a problem is bound to occur after a few months of operation.