Mercury, 25-30HP - 3 Gearcase - 10 tooth spline, 25HP (4-Stroke) 2006-, 30HP (4-Stroke) 2006-, , Tohatsu/Nissan, 25-30HP - 3 Gearcase - 10 tooth spline, 25HP 1986-2001, 30HP 1985-2001, 25HP (4-Stroke) 2002-, 30HP (4-Stroke) 2002-, MFS 25/30 (4-Stroke), NSF 25/30 (4-Stroke)