Guess I am not sure what the 500 hp motors are? 500 c.i. ? 500 horsepower?
Blown? Does HP mean High Performance or horsepower? Give some more info and maybe we can figure it out.... Thanks
They are Mercury racing HP500's. They are 502 C.I. carbureted motors. They are rated at 470HP
(The 500EFI is the newer model)