Chainsaw Gas Cap Vent Leaking

Take spark plug out and pull rope and fuel shoots out of exhaust and spark plug hole.

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

If even a single thread becomes cracked or chipped it can cause fuel to leak out. If fuel leaks from the carburetor rebuild or replace the carburetor to prevent gas from leaking. Inspect the top of the gas cap and look for cracks but also inspect the threads on the underside of the cap. Replace the cap and see if it is still leaking.

The vent hole gets rid of heated gasses so it may be broken. Cleaned it out good. I have a stihl chainsaw 028 that just fills up with fuel. If the vent hole is broken ripped open or clogged the gas may leak in other areas.

Still does it just sitting there. Fuel lines are good. Replace the fuel tank cap if its seal is damaged and leaking. For the carburetor to work these pressures must be equal.

Check the fuel tank and replace the tank if it s damaged. Thought it might be tank vent.