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. Close the Choke, Then Set It to “Run” or “On” Because your saw has been running, it’s already had fuel cycled into its carburetor. If dust, wood chips or other material blocks these systems, the engine will start to overheat.
The most common problem causing your chainsaw to run slow or die out is a vapor lock in the fuel lines. Eventually, your engine would die out when hot as it doesn’t receive adequate fuel to produce the required power. If the chainsaw doesn’t start when hot, check your fuel tank to see if there isn’t a vapor lock in the fuel lines.
chainsaw won’t start when hot Related Question:
What causes vapor lock in a chainsaw?
Vapor lock occurs when the fuel (usually gasoline) within the fuel delivery system overheats and vaporizes too rapidly. The resulting excess gas bubbles accumulate to the point of actually blocking normal fuel delivery.
Do you start a chainsaw with the brake on?
When using a chainsaw, you should always start it with the chain brake engaged so the chain does not move.
Why can’t I start my Stihl chainsaw?
Dirty or clogged fuel tanks, dirty fuel filters and lines, loose fuel hoses, dirty air filters and a dirty carburetor can all restrict fuel flow. Check, clean and replace all the fuel system parts before moving into the internal engine, as gas problems create a majority of starting problems.
How long to wait if chainsaw is flooded?
Many people wonder if a flooded chainsaw will fix itself? The answer is yes, but not always. By letting the chainsaw sit for about 20 minutes it will allow some of the fuel inside the engine to evaporate.
How do I cool down my chainsaw?
Hold the chainsaw by the front handle so the starter side is tilted downwards slightly. Brush off the entire starting, flywheel and cooling area, letting the sawdust fall away from the engine.
Can you overwork a chainsaw?
Even if your saw is in ideal working order, it will overheat if you overwork it. Two ways to do that are to operate it with a dull chain and try to make it do something for which it isn’t designed, such as cut a curve.
How do you stop vapor lock?
Once the fuel system has cooled, you can help eliminate any vapor left in the fuel system by first pressing the accelerator pedal slightly (do not press it to the floor) while cranking the engine. Once the engine starts, hold the accelerator pedal down until the vehicle runs smoothly, indicating the vapor lock is gone.
Why does my chainsaw bog down when I give it gas?
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.
Can you rev chainsaw with brake on?
Running a chainsaw with the brake on can be dangerous for you and anyone in your vicinity. The chainsaw will not cut, but it still creates sparks that can cause fires or startle nearby pets. It also doesn’t allow the saw to cool down enough which increases the likelihood of overheating and breaking down.
Can you start a chainsaw with a drill?
Starting the chainsaw using a drill is convenient for elderly DIYers who are no more strong enough to pull the cord too many times with speed. If the engine of your chainsaw is not convertible from cord start to an electric start then you can start it with an electric drill.
Why won’t my Stihl chainsaw start when it’s hot?
When your chainsaw quits after it gets hot, you either have a problem with gas flow being restricted into the engine or with the spark. This is a common occurrence on older-model chainsaws. By replacing your spark plugs and keeping your gas lines clear you can reduce the chances of this problem recurring.
What does a decompression button on a chainsaw?
A decompression valve releases some of the compression from the combustion chamber during the starting procedure, making the engine easier to turn over when pulling the recoil rope.
Does a Stihl chainsaw have a decompression valve?
To make starting the STIHL 4-MIX engine easier, the engine has been fitted with a decompression system which extends the valve opening times when starting. Starting the prize-winning STIHL 4-MIX engines is thus convenient and quick.
Will a flooded engine fix itself?
Will a flooded engine fix itself? No. You have to take appropriate measures to restore the fuel and air balance in your car’s engine.
Where do you spray starter fluid on a chainsaw?
Removing the air filter, spraying starting fluid into the carburetor and pulling the starting rope is another quick way to clear out the engine. Starting fluid creates a leaner fuel mixture that ignites more easily, and the operation of the engine clears out the combustion chamber automatically.