Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 682-11631-00 STD Viewer:956 OEM No. : 682-11631-00-STD For YAMAHA Outboard 9.9, 15 HP You May Also Be Interested In Piston Ring 647-11610-20 0.50 Piston Kit 6G5-11635-00 0.25 Piston Ring 39-821695A6/821695A 6 0.015 Bushing 647-45316-09