Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 662-11631-01 STD Viewer:1178 OEM No. : 662-11631-01-STD For YAMAHA Outboard 9.9, 15 HP You May Also Be Interested In Piston Ring 6R5-11604-00-00 0.25 Piston Kit 682-11631-00 STD Labyrinth Packing 346-00051-1/346000511M Gear 648-45570-00(23T)