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. To fix an engine that keeps cutting out, all components that deal with the fuel and air delivery have to be checked, cleaned, or replaced. The fuel filter in your chainsaw can be found inside the fuel tank. A clogged fuel filter stops fuel from entering the fuel lines, and eventually, from reaching the engine, causing it to cut out. If your engine keeps cutting out, check the fuel filter for damage and clogs. 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.
Try to relax and read our guide to possibly find the reason why your chainsaw won’t stay running. If the idle port of your chainsaw gets blocked or damaged, your chainsaw won’t stay running. If you have more chainsaw questions, here at Canberra Diamond Blade, we are happy to help! In the meantime, check out our other chainsaw articles answering questions like if it’s worth sharpening a chainsaw chain.
If you use it too much while it’s overheating, it’s possible you may burn out the engine or pistons causing you to have a broken chainsaw that will either need to be repaired or replaced. Chainsaws generally cut out after starting because the engine gets too little or too much fuel from the carburetor. The most common problems why a chainsaw does not stay running are: Spark Switch/Plugs.
A clogged air filter is usually the most common reason as to why your chainsaw keeps on stalling. Re: Chainsaw won’t re-start when Hot Typically when a chainsaw wont start when warmed but starts and runs fine when cool, it’s because the air/fuel ratio is too rich. Stihl chainsaw carburetors usually have three adjustment screws: one each for idle, low speed and high speed.
why does my chainsaw keep cutting out 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 cut out when revved?
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 stall out 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.
Why does my chainsaw keep running?
The most probable – and easiest to fix – cause of chain rotation while the chainsaw engine idles is a poorly adjusted idle setting on the carburetor. The result is that too much fuel is delivered to the combustion chamber when the throttle is released, and the engine doesn’t really slow. says Chainsawr.
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.
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.
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.
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.
Why does my chainsaw bog down at full throttle?
If your chainsaw is bogging down when you give it throttle, this is often a sign of improper gas-to-oil ratio. If there is too much gasoline in relation to the amount of oil used, this is known as a “rich mixture” and can cause the chainsaw to run poorly.
Why does my chainsaw rev too high?
The throttle valve (butterfly) simply cuts off the supply of combustible air/fuel and the engine stops. If this adjustment is set too high, the high idle speed will cause the centrifugal clutch to engage and the chain will run. This is a dangerous condition and should never be allowed.
What is a chainsaw carburetor?
The carburetor on a chain saw is pretty simple, as carbs go, but it’s not entirely uncomplicated. The job of the carb is to accurately meter extremely tiny quantities of fuel and mix it with the air entering the engine so that the engine runs properly.
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.
How often should I change my chainsaw fuel filter?
Most manufacturers recommend changing your fuel filter between every 20,000 and 150,000 miles. The older the vehicle, the more frequent your filter changes should be. This is because after around seven years of driving, rust, dirt and debris build up faster, clogging the filter.
Can you spray carb cleaner in chainsaw?
You can use Sea Foam Spray to clean your chainsaw carburetor effectively. Sea Foam spray has a petroleum cleansing solvency. And adds lubricity to various components of the carburetor. It is a fine cleaning agent for chainsaw carburetors.