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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 is vapor lock chainsaw?
Vapor lock occurs when the fuel (usually gasoline) within the fuel delivery system overheats and vaporizes too rapidly. Consider allowing the chainsaw to cool down for 10 to 15 minutes until vapor pressure has subsided and saw will start without removing gas cap.
What happens if you overheat a chainsaw?
The air filter will eventually get to a point where it will become so clogged that it won’t let fresh air pass through. At this point, the engine will stop working because it cannot run without air. This will make the chainsaw overheat due to the lack of cooling fresh air.
Why does my chainsaw start and then stop?
A clogged carburetor is often caused by leaving fuel in the chainsaw for a long period of time. Over time, some of the ingredients in the fuel may evaporate, leaving behind a thicker, stickier substance. This sticky fuel can clog up the carburetor and cause the chainsaw engine to stall.
How do you start a chainsaw that has been sitting?
So how can you fix it? Just let the saw sit for 30 min and the excess gas will evaporate. Remove the spark plug, dry it, crank over the engine a few times to dry the cylinder. Now refit the plug and try again. Set the switch to “On”, set throttle to fully open, set choke to “Off” and crank over the engine.
Do you start a chainsaw with the brake on?
When engaged, the chain brake stops the chain from rotating around the saw’s guide bar. When using a chainsaw, you should always start it with the chain brake engaged so the chain does not move.
What are the signs of vapor lock?
Vapor lock causes: Loss of fuel pressure (and flow) Loss of power. Stalling. Difficulty restarting the engine.
How do you cure 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.
How do you stop vapor lock?
If you’re wondering how to prevent vapor lock, try using a thermal barrier like a heat shield, or heat sleeve. Whether you have a carburetor or use fuel-injection in your vehicle, vapor lock can bring your vehicle to a standstill causing hours of frustration.
How do I keep my chainsaw cool?
To prevent the bar from overheating and warping, the engine blows a fine mist of oil on the chain while it’s spinning. Replenish this oil whenever you add gasoline, and periodically hold the saw over a clean surface while you pull the throttle and check the surface for oil.
How tight should a chainsaw blade be?
A properly-tensioned chainsaw chain should still be just a little loose on the chainsaw guide bar, but the chain needs to be tight enough that you can’t pull the drive links out of the bar nose.
How do I know if my chainsaw spark plug is bad?
What Does a Bad Spark Plug Look Like and What Makes It Look That Way? Black, chunky carbon buildup spanning the gap between the sparking end of the plug and the hook-shaped metal piece overhanging the end. Dark carbon residue built up on the ends but not spanning the gap.
Why does my chainsaw dies when I give it gas?
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. If the filter becomes clogged, not enough fuel will reach the engine for it to run properly.
Do all chainsaws have spark arrestors?
Chainsaw manufacturers include a spark arrestor on every model to prevent combustion byproducts from escaping the combustion chamber during saw operation and starting a fire. To access the spark arrestor, you’ll probably have to remove the muffler.
Why do chainsaws never work?
The chainsaw’s engine is flooded with fuel. A fuel issue is one of the most common reasons why a chainsaw won’t start. If you believe fuel has flooded the chainsaw engine, pull the starter cord several times while holding the throttle, dry and replace the spark plug, and then try starting the chainsaw again.
How long to wait if chainsaw is flooded?
Let your chainsaw sit for 15-20 minutes to allow the fuel to evaporate from the engine and then repeat the starting instructions.
Why is my Stihl chainsaw not starting?
Common solutions for: Stihl Chainsaw won’t start. The spark plug might be defective. To determine if the spark plug is defective, remove the spark plug and inspect it. A clogged carburetor is often caused by leaving fuel in the chainsaw for a long period of time.
What temperature does vapor lock occur?
When modern injection motors are stopped after long travelling, some might not be able to restart immediately. The reason is that those new motors reach temperatures up to 120-140°C, and vapor lock is prone to happen at high temperatures.
At what temperature does vapor lock occur?
When modern injection motors break down after traveling for a long distance, some might not be able to restart right away. This is because those new motors reach temperatures of up to 120–140 °C, and vapor lock is likely to occur at such high temperatures.
