Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 644-11631-03 STD Viewer:1378 OEM No. : 644-11631-03-STD For YAMAHA Outboard 3.5, 5 HP You May Also Be Interested In Piston Ring 61U-11601-00-00 STD Piston Kit 688-11635-03 0.25 Propeller Shaft 44-850308/850308 Joint, Link 6E9-41237-00-00