402&500 Models...1974-1984
40hp(2&4 stroke/not bigfoot)...1977-newer
40hp(Sea Pro/Marathon)...1977-newer
45hp...1986-1989
48hp(Mariner)...all years
50hp(2&4 stroke/not bigfoot)...1977-newer
55hp(Mercury/Sea Pro/Marathon)...1995-newer
60hp(4 stroke)(not bigfoot or Sea Pro/Marathon)...1978-newer
60hp(2 stroke)...1978-newer