Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 688-11631-02 STD Viewer:1013 OEM No. : 688-11631-02-STD For YAMAHA Outboard 55, 85 HP You May Also Be Interested In Piston Ring 647-11610-10 0.25 Piston Kit 677-11635-00 0.25 Oil Seal 350-01215-0/350012150M/350-01215-1/350012151M Clip 6H4-11634-00-00