Carb problem

[iron man]

So that Grizzly 660 sitting in my driveway is having technical problems. When we rebuilt the carb, my brother put a new gasket on the bowl of the carb from a rebuild kit and it didn't even come close to fitting. So I bought one specifically for the carb and put it on and tested it for a few minutes. It started leaking gas from the bottom of the carb looks like right at or above the bowl about 10 minutes after I fired her up from the same locale that it was before. Thought it could have been the brass screw that controls the fuel flow so i changed that out with the old one and that didn't do a thing. I'm just about out of ideas. I know its not leaking from the tank or any hoses.