Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 689-11631-00 STD Viewer:910 OEM No. : 689-11631-00-STD For YAMAHA Outboard 25, 30 HP You May Also Be Interested In Piston Kit 624-11631-00 STD Piston Ring 656-11610-11 0.25 Impeller 682-44352-00-00/682-44352-01-00 Gasket, Head Cover 6E0-11193-01-00/6E0-11193-A1-00