Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 644-11631-03 STD Viewer:1388 OEM No. : 644-11631-03-STD For YAMAHA Outboard 3.5, 5 HP You May Also Be Interested In Piston Ring 6H4-11610-20-00 0.50 Piston Ring 6K5-11601-02-00 STD Coil Primary 32140-96310-000 Gasket 6G1-14398-00-00