198 Trouble Starting

I pulled the carb off and there doesn't seen to be anything blocking the intake (at least as far down as I can see), but there is a film of black gunk, and I did notice a slow but steady stream of gas pumping out the back of the gasket between the carb and the intake manifold. I assume I am not only leaking gas but air as well. I need to get that replaced and see where that gets me. Any other tips???