Mercruiser: 48-816706A40, 48-816706A45, 816706A45

Shaft Splines: 13

Mercury

40hp (2- & 4-Stroke) (Not Bigfoot) 1977-Present;

40hp (Sea Pro/Marathon) 1977 - present;

45 hp 1986 - 1989;

48 hp (Mariner) any year;

50 hp (2- and 4-stroke) (not Bigfoot) 1977 - present;

55 hp (Mercury/Sea Pro/Marathon) 1995 - present;

60 hp (4-stroke) (Not Bigfoot or Sea Pro/Marathon) 1978 - present;

60 hp (2-stroke) 1978 - present;

70 hp (including Model 700) before 1983;

Force

40/50 hp 1995-1998

70 hp 1991-1995

75 hp - 1996-1998