Yamaha - 4 1/4 Gearcase - 15 tooth spline, T50 (4-Stroke)1996-, 60HP (C60/E60/P60) 1992-2005, T60 (4-Stroke) 2003-, 70HP 1984-, F70 (4-Stroke) 2010-, 75HP (C75/E75/P75) 1994-99, 80HP 1997, F80 (4-Stroke) 1999-2002, 85HP 1991-97, 90HP (C90) 1984-