I have a 1992 Evinrude Spitfire 150 hp on a 1979 Chaparral 21' Cuddy Cabin that I am in the process of refurbishing. The boat originally was equipped with a 1979 200 hp Evinrude and was repowered in 1992 with the 150 Spitfire. I bought the boat with the engine "blown" and have determined that...