Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 656-11631-60 STD Viewer:1427 OEM No. : 656-11631-60-STD For YAMAHA Outboard 20, 25 HP You May Also Be Interested In Piston Ring 675-11610-00 STD Piston Kit 6G5-11636-00 0.50 Gasket, Carburetor 16221-ZV1-850 Screw, Pan Head 97880-06016-00