Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 662-11631-01 STD Viewer:1210 OEM No. : 662-11631-01-STD For YAMAHA Outboard 9.9, 15 HP You May Also Be Interested In Piston Kit 6R5-11635-11 0.25 Piston Kit 61A-11642-01 STD Oil Filter 16510-92J00-000 Gasket, Float Chamber 646-14384-00-00