Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 688-11631-02 STD Viewer:1028 OEM No. : 688-11631-02-STD For YAMAHA Outboard 55, 85 HP You May Also Be Interested In Piston Ring 6H4-11610-00-00 STD Piston Kit 6D0-11646-00 0.50 Gear, Reverse 43-8037411/803741 1(27T) O-Ring, Drive Shaft 314728/0314728