Finding the reasons why the chainsaw does not start Determining why the chainsaw does not start on hot or cold will help a step-by-step troubleshooting algorithm. Find out the main causes of breakdowns and methods
Checking the breather and cleaning it.
The breather is another element, from the 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 prevents gasoline from flowing out and equalizes the air pressure required for the free flow of fuel into the carburetor.
If the breather is dirty, the working chainsaw stalls, and when it starts it refuses to start. The thing is that air stops flowing through the hole. As a result, a negative pressure (vacuum) is created inside the fuel tank, preventing the flow of gasoline to the carburetor.
Defining the problem is pretty straightforward. Disconnect the fuel hose from the carburetor and see what happens to the gasoline. If it flows out without hindrance in a good trickle, then everything is in order with the breather. If it is absent or it flows weakly and intermittently, then the reason is identified the breather is clogged with dirt. You can solve the problem by cleaning the air hole with a regular needle or a powerful jet of compressed air.
Determine the availability of fuel and its supply.
First, you need to make sure that there is a fuel mixture in the tank of a chainsaw that does not want to start, and it regularly enters the carburetor. With a full tank, we check how the mixture is fed through the gas line. Disconnect the fuel system pipe from the carburetor and try to pump it up. In the case of a complete order, when pumping, gasoline will be supplied in jerks in accordance with the standards set by the manufacturer. Poor or no fuel supply can result from:
- The fuel supply channel is clogged;
- Clogged fuel filter.
Often the reason for a poor start of the chainsaw can be a tank that is too full. In this case, you should pay attention to the presence of smudges under the saw case cover. If present, see the connection of the gasoline feed pipe to the carburetor. Most often, it is squeezed out by pressure when the tank cap is screwed on, filled up to the very 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, the remaining gasoline is not drained, and the tool is left for long-term storage (more than 2 weeks), then the processes of resin formation and polymerization of components will begin to occur inside the tank. Which can cause carbon deposits on the piston, rings and cylinder liner. Therefore, always prepare the mixture only in the required amount before work.
Checking the condition of the fuel and air filters.
If everything is in order with the fuel quality, the chainsaw engine may not start due to clogged fuel and air filters. To diagnose these elements, it will be necessary to perform a number of manipulations associated with their dismantling.
For the fuel filter:
- Disconnect the gasoline supply channel from the carburetor;
- Pump up fuel.
If there is little or no pressure in the pipe, disconnect the filter. Before this, free the tank from the mixture and remove the filter element itself. Dismantling is done with a wire hook. A clogged replacement cartridge that causes a 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, it should be cleaned on a regular basis.
A clogged air filter can cause the chainsaw engine to run erratically, making it stalling or difficult to start. Dust and dirt deposited on the adsorbent material impede the flow of air into the system, make 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 cause of a poor start.
Care should be taken when removing the air filter, as dust accumulated on the surface of the saw during operation can enter the carburetor. And this is fraught with more expensive repairs. After detaching the cartridge, thoroughly clean it from the accumulated dirt and rinse it with the addition of detergent. Dry the element and place it in place just as carefully.
The chainsaw starts and immediately stalls
The reason for this kind of malfunction may be the pouring of a direct candle at the very moment when you are trying to start the chainsaw. Since a significant amount of gasoline is collected precisely between the electrodes of the spark plug, therefore, a spark cannot be created. You can fix this kind of breakdown yourself, and you do not have to contact specialized services.
To do this, simply turn out the candle itself, and dry it. You can also try to heat up, it will not be superfluous, but remember that this kind of manipulation must be carried out exclusively through a gas burner.
Otherwise, a specific carbon deposit may appear on the very surface of the direct electrodes. In the meantime, while your candle dries out, you need to drain the excess fuel directly using the hole and leave to dry for about half an hour.
Causes and remedies
Undoubtedly, after reading this heading, you continue to read this paragraph and this is not surprising.
In fact, there are a lot of reasons for this kind of failures in the operation of the tool, and now we will try to deal with the main ones. So let’s get started:
Why does not it start up hot
Before starting to solve this problem, it should be noted that the productive and correct operation of the engine depends primarily on the speed through the use of a starter mechanism. In most models, this minimum level is 800 rpm. An important fact is that the main reason for not planting the chainsaw is normal engine flooding.
In order to eliminate this problem, it is first of all necessary to put the damper (air) in the middle position. After that, blow it a couple of times to start the chainsaw. After the process has started, warm it up within ten seconds, then put it into running (idle) mode. After carrying out these manipulations, you can fully open the damper (air).
After that, it is worth noting that before starting the direct implementation of actions regarding the prescribed recommendations, try to start the device directly in the idle position. To do this, just pull the rope.. Since if the engine is not hot, then the plant will be produced without any problems.
But if this does not help, in this case, you should directly turn the cold screw, directly clockwise.
Remember that the higher the RPM level in your device, the easier it will be for you to start the device. And remember that the chain must be stationary relatively cold running.
We restore the work of the tool
To restore the saw, it does not matter whether the Ural or Stihl brand, you need to know the location of the breakdown.
First, we check and change the unusable fuel mixture. If the saw still does not start, then check further point by point.
We pull out the problem in the candle and dry it. In no case should you pierce it, because this will lead to a malfunction of the part. After 30 minutes after drying, you can insert the spark plug back, before that, check if there is any fuel left in its place.
In addition, the candle can simply break, so it is better to have a spare to rule out the cause.
Another reason that the tool does not start well and stalls is poor contact between the spark plugs and the high-voltage wire. If everything is in order here, but there is still no spark, the ignition unit itself may have broken. Such a breakdown can only be corrected by replacing it.
The air filters should be checked and cleaned from time to time. If you have not checked it since the moment of purchase, then it could become clogged with dust and cause a malfunction.
In models such as Stihl 180, Ural or Partner 350, the breather is clogged, which often leads to breakdown. You can use a sewing needle to clean it.
On the Stihl 180, Druzhba, Ural and Husqvarna 142 models, the muffler sometimes gets clogged and needs to be checked and cleaned.
If the problem is in the carburetor, then without proper experience, you should not try to fix it. It is best to turn to specialists.
If, after checking and eliminating the above problems, your saw still does not start, then most likely the breakdown lies in the cylinder group.
When, upon inspection, you see damage and chips on the piston or cylinder assemblies, then these elements will have to be replaced.
If the reason for the malfunction of the chainsaw is the pipes that leak, then most likely not enough lubricant is supplied to the chain. To eliminate the problem, the tubes are just replaced, and the joints are covered with sealant.
The details of the mechanism cannot last forever, so they will have to be changed periodically. To find out how long which part serves, you need to look at the instructions.
We analyze the possible causes of the breakdown
You can find why the tool does not start in the instructions itself. But the instructions are not always at hand.
Although each model has its own characteristics, in general they are all similar. Therefore, I will tell you the possible causes of breakage and possible ways to eliminate them for different tools.
What to do if the chainsaw won’t start
Good afternoon, dear readers and subscribers of my blog! At one inopportune moment, you may find that your chainsaw will not start. But do not rush to immediately take the tool in for repair, perhaps you can fix this breakdown yourself. I will tell you what to do when the chainsaw won’t start, and how to find the right solution to this problem.