Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 656-11631-60 STD Viewer:1398 OEM No. : 656-11631-60-STD For YAMAHA Outboard 20, 25 HP You May Also Be Interested In Piston Pin 677-11633-00-00 Piston Ring 664-11610-00 STD Piston Kit 391798/0391798 STD Gasket, Exhaust Outer Cover 664-41114-00-00/664-41114-A0-00