There’s an interesting little blip in the service manual : It recommends replacing the needle and inlet seat with one having a smaller orifice, otherwise the pump will force too much fuel into the carb. The suggestion is getting a needle/seat combo for a T’son MD12A. It says the stock orifice is the same size as a #41 drill, while the replacement is a #52 drill. I’d try it first to see if it really floods out….