Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 662-11631-01 STD Viewer:1188 OEM No. : 662-11631-01-STD For YAMAHA Outboard 9.9, 15 HP You May Also Be Interested In Piston Kit 6F6-11631-00 STD Piston Ring 689-11610-20-00/689-11610-21-00 0.50 Gasket 27-19050-3/19050 3 O-Ring 09280-05007