Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 688-11631-02 STD Viewer:1027 OEM No. : 688-11631-02-STD For YAMAHA Outboard 55, 85 HP You May Also Be Interested In Piston Ring 6K5-11601-02-00 STD Piston Ring 676-11610-00 STD Zinc Anode Assembly 55300-95500-000 Piston Ring 39-822321A1/822321A 1 0.015