Mercury/Mariner, 40-140HP - 4 1/4 Gearcase - 15 tooth spline, 40HP (4-Stroke/Bigfoot) 1995-, 50HP (4-Stroke/Bigfoot) 1995-, 60HP (4-Stroke/Bigfoot) 1995-, 60HP Sea Pro/Marathon 1995-, 65HP Model 650 (4-Cyl) 1961-70, 65HP Model 650 (2-Cyl) -1971, 70HP 1987-89, 75HP (2&4-Stroke) 1984-, 75HP Sea Pro/Marathon, 80HP 1978-89, 80HP Mariner 1978-83, 80HP Yamaha 1977-83, 80HP Model 800 (2&4-Cyl) -1977, 80HP Model 850 (2&4-Cyl) -1977, 90HP (2&4-Stroke) 1978-, 100HP 1988-, 115HP (2&4-Stroke) 1978-, 125HP 1994-, 140HP (Inc. Sea Pro/Offshore) 1978-81, Models 900-1500 -1977, Force 75HP 1999-, Force 90/120/150HP 1995-