If your chainsaw has been in storage, the fuel may need to be replaced. When gasoline is left standing in the fuel lines and carburetor, it partially evaporates, leaving behind a varnish-like substance that clogs the fuel system. The fuel may also have moisture in it, and the moisture mixes with ethanol in the gasoline and settles at the bottom of the tank, which is where the fuel line is located.
Issues that usually cause a chainsaw to keep cutting out include bad fuel, clogged carburetor, fuel lines, etc. In general, a chainsaw that starts but keeps cutting out is because the engine is not receiving the required fuel and air to keep it running. High-Speed Fuel Adjustment: The high-speed fuel adjustment controls the fuel proportion in the combustible air-fuel mixture when the chainsaw is running at cutting speed.
The primary reason that is why your chainsaw won’t stay running is the faulty carb. In your chainsaw, there is an idle port which is responsible to keep your chainsaw in idle position. Thus, the port will apply force to make your chainsaw stay running.
why does my chainsaw keep dying Related Question:
How do you fix a chainsaw that won’t stay running?
Clogged Air Filter – Check the air filter Your chainsaw’s engine needs the right supply of air to run properly. A clogged air filter can be the reason why your chainsaw won’t start or stay running. Find your chainsaw’s air filter and remove it. If it’s clogged or too dirty, wash it or replace it.
Why does my chainsaw keeps shutting off?
The main culprit behind a chainsaw engine that keeps cutting out is usually a dirty or wrongly adjusted carburetor. A faulty carburetor fails to supply the correct air-fuel mixture, also called the “charge”, to the engine. Causing the engine to cut out or stall.
Why does my chainsaw stop when I give it gas?
If the filter becomes clogged, not enough fuel will reach the engine for it to run properly. Because your chainsaw will idle, but dies when it is revved up to full power, it means that the filter is only partially clogged; it will allow enough fuel to the engine to run on idle, but not enough to sustain full throttle.
Why does my chainsaw cut out after starting?
If your chainsaw stalls instead of producing the reassuringly high-pitched sound of a healthy engine when you press the throttle trigger, something is interfering with efficient fuel combustion. The problem could be a lack of air or a misfiring spark plug, and both of these problems are easy to check and remedy.
Why does my Mcculloch chainsaw keep cutting out?
The air and fuel filters can get clogged or dirty which can result in the engine stalling. If these filters are clogged you should try to clean or replace them.
Why does my chainsaw overheat?
Common reasons behind chainsaw overheating are a wrong oil/fuel mixture, a blocked or clogged exhaust. It is also possible that the air filter is clogged. Or you are using a dull chain. If you are using your chainsaw for an extended time, or it is not powerful enough for the job, it can also overheat.
How do I know if my chainsaw carburetor is bad?
To test the carburetor, remove the air filter, pour a teaspoon of fuel into it, and pull the starter rope. If the engine starts momentarily and then dies, the carburetor is likely why the chainsaw won’t start.
Why does my Stihl chainsaw dies when I give it gas?
An engine stalls when it’s getting too much or not enough fuel from the carburetor. Stihl chainsaw carburetors usually have three adjustment screws: one each for idle, low speed and high speed. If the saw stalls while it’s idling, adjusting the idle screw, which usually is marked LA, should help.
How do you clean a chainsaw fuel filter?
Brush the air filter gently with a soft brush or wash it in warm soapy water then dry it. Do not use compressed air to clean it – compressed air can blow holes in the filter, allowing dust and debris into your carburetor.
Why does my Stihl chainsaw bog down when I give it gas?
The Job of the Carburetor One controls the fuel mixture when the engine is idling, one controls it when the engine is operating at low speed and one is for high-speed fuel control. When the saw bogs down during cutting, it’s usually the high-speed screw you need to adjust.
How do you start a stubborn chainsaw?
Try to start the chainsaw after priming the carburetor. 5. Activate the choke by moving the lever to the full choke position and pull the starter rope 3 or 4 times to start the engine. If that doesn’t work, move the choke lever to half choke and pull the starter rope, 6 times maximum, to start the engine.
Why does my chainsaw only run with the choke on?
When your chainsaw only runs if the choke is on the problem, in most cases, is a result of fuel supply problems or a faulty carburetor. To fix the problem you should check and clean the fuel system and carburator.
How does a primer bulb work on a chainsaw?
Some chainsaws use a primer bulb to help suck gas into a cold carburetor. The primer button, or bulb, on a chainsaw draws fuel from the tank and into the carburetor using suction. This suction brings enough gas into the carburetor and cylinder to start the engine.
Can you clean a chainsaw carburetor without taking it apart?
To clean a carb, you have to take it apart. If it needs cleaning, the parts that need cleaning can’t be seen from the outside.
How do you clean a carburetor without removing it?
To clean a motorcycle carburetor without removing it, you’ll need to remove the bowls at the bottom of the carburetor. Once the bowls are removed, spray some carburetor cleaner up inside, wait a few minutes, then spray again to ensure coverage. Then replace the bowls and start the motorcycle to assess how it runs.