Chainsaw Gas Cap Vent Leaking

Take spark plug out and pull rope and fuel shoots out of exhaust and spark plug hole. Replace the fuel lines if they re leaking. Any help would be appreciated.

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Cleaned it out good.

Chainsaw gas cap vent leaking.

The vent hole gets rid of heated gasses so it may be broken. Move the chainsaw to a well ventilated area and check the fuel lines for cracks. Thought it might be tank vent. I have a stihl chainsaw 028 that just fills up with fuel.

For the carburetor to work these pressures must be equal. Check the fuel tank and replace the tank if it s damaged. Fuel lines are good. When the gas inside your stihl chain saw fuel tank heats up it creates pressure inside the tank.

Replace the fuel tank cap if its seal is damaged and 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. Replace the cap and see if it is still leaking. Inspect the top of the gas cap and look for cracks but also inspect the threads on the underside of the cap.

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. Still does it just sitting there. If fuel leaks from the carburetor rebuild or replace the carburetor to prevent gas from 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 the vent hole is broken ripped open or clogged the gas may leak in other areas. If even a single thread becomes cracked or chipped it can cause fuel to leak out.