The quickest way of removing these vapors is to allow them to escape back into the atmosphere. ![]() These vapors exert an additional back pressure, thus hindering the fuel flow to the engine. Fastest Way:Īs discussed earlier, fuel vapors are trapped in the carburetor and fuel lines. However, the safest way of fixing this is to allow your chainsaw to cool for some time before starting it again. One way to fix a vapor lock is to open the fuel tank’s cover and allow the vapors to escape the fuel lines. This would confirm that your engine has indeed developed a vapor lock. If, in this case, you shut the engine off and restart it without checking the fuel tank, it will not start again. As it begins to heat up, it might show signs of bogging down and feel like the fuel has run out. If you experience that your overheated chainsaw doesn’t start up, check your tank vents for any clogging.Īlso, in the case of vapor lock, the chainsaw starts just fine when it is cold and runs perfectly too. Hence the vapor pressure doesn’t escalate too much to trigger a vapor lock. Usually, all fuel tanks have vents to allow the escape of fuel vapors into the atmosphere. The engine, as a result, starves from fuel, and hence it may not start again after it has been shut down after a heated operation. This heating effect worsens when the saw is run at wide-open throttle (WOT) or when the carburetor is adjusted to a lean setting.Īs the vapor pressure builds up, the carburetor faces difficulty extracting gasoline through the fuel lines due to the backpressure created by the vapors. As a chainsaw heats up, the vapor pressure in the fuel lines increases. Vapor lock is a condition when gasoline vaporizes excessively in the fuel tank and the fuel lines. Sometimes, it wouldn’t start up after turning the engine off. ![]() If your chainsaw engine has a vapor lock, it will start perfectly, but as it heats up, it will act as if it’s run out of fuel. ![]() How do I Know if a Chainsaw Engine has a Vapor Lock? 3 How do you Stop a Chainsaw Vapor Lock?.2 How do you Fix a Chainsaw Vapor Lock?.1 How do I Know if a Chainsaw Engine has a Vapor Lock?.
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