Chainsaw Gas Cap Vent Leaking

Replace the cap and see if it is still leaking.

Chainsaw gas cap vent leaking.

Flip the cap upside down and inspect the vent hole which is usually in the middle of the cap on poulan s chainsaw. If fuel leaks from the carburetor rebuild or replace the carburetor to prevent gas from leaking. Fuel lines are good. Any help would be appreciated.

If even a single thread becomes cracked or chipped it can cause fuel to leak out. I have a stihl chainsaw 028 that just fills up with fuel. 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.

Move the chainsaw to a well ventilated area and check the fuel lines for cracks. When the gas inside your stihl chain saw fuel tank heats up it creates pressure inside the tank. 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. Take spark plug out and pull rope and fuel shoots out of exhaust and spark plug hole.

Replace the fuel tank cap if its seal is damaged and leaking. Thought it might be tank vent. Cleaned it out good. If the vent hole is broken ripped open or clogged the gas may leak in other areas.

Replace the fuel lines if they re leaking. For the carburetor to work these pressures must be equal.