Chainsaw Gas Cap Vent Leaking

When the gas inside your stihl chain saw fuel tank heats up it creates pressure inside the tank.

Chainsaw gas cap vent leaking. If the vent hole is broken ripped open or clogged the gas may leak in other areas. Thought it might be tank vent. Move the chainsaw to a well ventilated area and check the fuel lines for cracks. Replace the fuel tank cap if its seal is damaged and leaking.

Fuel lines are good. Still does it just sitting there. In my shop is a poulan 2550 super clean chainsaw for a profuse fuel leak but what i wind up finding is a lot more based on my initial look. Cleaned it out good.

If even a single thread becomes cracked or chipped it can cause fuel to leak out. Replace the fuel lines if they re leaking. If the tank can t vent this added pressure fuel will stop flowing from the tank to the carburetor due to an imbalance in the atmospheric pressure and the tank pressure. For the carburetor to work these pressures must be equal.

Take spark plug out and pull rope and fuel shoots out of exhaust and spark plug hole. Flip the cap upside down and inspect the vent hole which is usually in the middle of the cap on poulan s chainsaw. Any help would be appreciated. Inspect the top of the gas cap and look for cracks but also inspect the threads on the underside of the cap.

If fuel leaks from the carburetor rebuild or replace the carburetor to prevent gas from leaking. Check the fuel tank and replace the tank if it s damaged.