I just bought a new prop on e-bay my old one is a 15/17 on a omc cobra with a 4.3 engine.The new one prop is a 14 1/4 /19 aluminum.The boat is a 19' cuddy about 3400lbs. I had tryed a 15/17 stainless and all it did was raise my rpms about 800 to 5400 ,just a littel to much I'd say.<br /> Any...
