If your Poulan Pro lawn mower is leaking gas, start at the carburetor, because that is where most fuel leaks begin. A lawn mower gas leak or gas leaking from the bottom of the lawn mower is most often caused by a dried out or missing carburetor bowl gasket at the bottom of the carburetor. Next, check the float needle, since a damaged needle can fail to shut off fuel and let the carburetor overflow. After that, inspect the carburetor gasket for wear or gaps, then look closely at the primer bulb, which can crack and leak as the rubber gets brittle with age. If those parts check out, inspect the fuel shut-off solenoid and connected fuel lines for loose fits, cracks, or pinholes. A stuck carburetor float can also cause a mower leaking fuel problem by holding the valve open, and in that case cleaning the carburetor may help before you rebuild or replace it. Enter your model number on RepairClinic.com to find the exact Poulan Pro carburetor bowl gasket, float needle, carburetor gasket, primer bulb, fuel shut-off solenoid, or other replacement part that fits your mower.
01 - Poulan Pro Carburetor Bowl Gasket
If the lawn mower leaks gas the carburetor bowl gasket on the bottom of the carburetor might be dried out or missing. If the leak is coming from the bottom of the carburetor, try replacing the carburetor bowl gasket.
Enter model number to search for the required part specific to your product
The float needle might not be shutting off the fuel. The float needle opens and closes the float valve to allow fuel to enter the float bowl. If the float needle is damaged, the carburetor will continue to fill with fuel until it overflows. If the float needle is defective, replace it.
Check the fuel shut-off valve for leaks, and ensure that the fuel lines fit tightly on the valve. If the fuel shut-off solenoid is leaking, replace it. In addition, inspect the fuel shut off lines for cracks or tiny holes. If a fuel shut-off line is leaking, replace it.
The float might be stuck open. If the float is stuck open, remove the carburetor assembly from the engine and clean it thoroughly. If the cleaning the carburetor is not effective, either rebuild or replace the carburetor.