Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 669-11631-00 STD Viewer:1210 OEM No. : 669-11631-00-STD For YAMAHA Outboard 9.9, 15 HP You May Also Be Interested In Piston Ring 688-11603-A0-00 STD Piston Kit 6L1-11642-11 STD Gear 66R-45560-01-00(38T) Power Head Gasket Kit 392615/0392615