Gene,
the reason I think the mixture is rich is because when I run the motor, the exhaust smells like raw fuel. The plugs, exhaust pipes and the valves ( I have the heads off right now) have black residue all over them. I just assumed this was from a rich mixture...please correct me if I am wrong.
I have tried to adjust the mixture screws, floats, and have checked for vacum leaks. When I adjust the mixture screws (i've tried turning both ways) accordng to protocol, the motor never really "bogs" down or the rpm's dont seem to change. I am thinking maybe the carb is dumping fuel. I did have short problem with some backfire through the carb, maybe that messed something up????