OEM Mercruiser: 50-854636T, 50-859170T, 50-884045T, 50-888160T, 50-893887T, 50-893897T, 854636T, 859170T, 859170T1, 888160T, 893887T, 8M6007427; Yamaha: 67C-81800-00, 67C-81800-01, 67C-81800-02, 67C8180000, 67C8180001, 67C8180002, 67C818000200, 6E5-81800-12-00 Electricity 12 V Model / OEM 50-854636T, 50-859170T, 50-884045T, 50-888160T, 50-893897T, 854636T, 859170T, 893887T Engine 30 HP (Year: 1999+), 40 HP (Year: 1999+) Tooth 9 CCW