Why is gasoline coming out of air filter?

You may have already done this but here is what I would do in this case. My initial guess would be the gasket in between the air filter housing and the carburetor. There is typically a separate port or hole in the gasket that leads directly to the primer.

• Take the air filter cover off and remove the air filter.
• Press the primer bulb a few times until you see where the gasoline is coming from.
• If you don’t see where it is coming from, then trace the gasoline back to its origin.