My mower wouldn't start as I haven't used it in a while. I cleaned out the carburetor and it started out. However, the white piece that sticks out is squirting gas and so is the air filter/primer button. Now it won't start again and I think it's because no fuel is getting to the engine due to leaking out. If I press the primer button it just squirts out of the white tube. Any ideas as to what the problem is?