Chosen Solution
when I pour gas in the tank and before I can start it up the gas is leaking out of the carburetor
Your carb may need a new gasket kit. Please give us the model number and make of your mower.
Merilyn Williams a stuck needle valve in the float bowl will cause a leak. To narrow it down you will have to tell us what model your mower is, where it leaks and what make and model engine your mower uses.