Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 688-11631-02 STD Viewer:1015 OEM No. : 688-11631-02-STD For YAMAHA Outboard 55, 85 HP You May Also Be Interested In Piston Kit 6H4-11636-01 0.50 Piston Ring 664-11610-10 0.25 Piston Kit 6K5-11636-03 0.50 Spark Plug 94701-00160-00/B8HS-10