ARCO NEW Original Equipment Quality Replacement Outboard Starter Fits Mercury 30/40/50/60 HP 1999 - UP, 3-Cyl, 4 Stroke. Yamaha 2000 - UP 40 HP, 4 Stroke, 9 tooth drive gear. Replaces Part Numbers Mercury 50-859170T Mercury 50-859170T1 Mercury 50-884045T Mercury 50-888160T Mercury 50-893887T Yamaha 67C-81800-00 Yamaha 67C-81800-01 Yamaha 67C-81800-02