Mercury, 9.9-20HP - 2 1/2 Gearcase - 14 tooth spline, 9.9 CT/Bigfoot 2005-, 9.9HP Pro kicker, 15HP (4-Stroke) 2007-, 20HP (4-Stroke) 2007-, , Tohatsu/Nissan, 9.9-20HP - 2 1/2 Gearcase - 14 tooth spline, 9.9HP (2-Stroke) 1984-, 9.9HP (4-Stroke) 2000-03, 12HP 1985-88, 15HP (2-Stroke) 1985-, 15HP (4-Stroke) 2000-, 18HP (2-Stroke) 1985-, 18HP (4-Stroke) 2001-08, 20HP (4-Stroke) 2007-, MFS9.9/15/18/20, , , Johnson/Evinrude, 15HP - 2 1/2 Gearcase - 14 tooth spline, 15HP (4-Stroke) 2012-