Bronze hub with Rubber Bushing
13 spline tooth 3 1/4" Gearcase
25hp Bigfoot(4 stroke) ... 1999-2005 ; 30hp Bigfoot(4 stroke) ... 2010-newer
30hp(2&4 stroke) ... 1994-2005 ; 30hp(sea Pro/Marathon) ... 1994-newer
3 5 hp ... 1984-1989 ; 402&500 Models ... 197 4-1984
40hp(2&4 stroke/not bigfoot) ... 1977-newer; 40hp(Sea Pro/Marathon) ... 1977-newer 45hp ... 1986-1989 ; 48hp(Mariner) ... all years
55hp(Mercury/Sea Pro/Marathon) ... 1995-newer; 50hp(2&4 stroke/not bigfoot) ... 1977- newer
60hp(4 stroke)(not bigfoot or Sea Pro/Marathon) ... 1978-newer; 60hp(2 stroke) ... 1978- newer
70hp(Model 700) ... 1983 ; Force40/50hp ... 1995-1998
70hp ... 1991-1995; 75hp ... 1996-1998