Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 689-11631-00 STD Viewer:946 OEM No. : 689-11631-00-STD For YAMAHA Outboard 25, 30 HP You May Also Be Interested In Piston Kit 6H4-11631-01 STD Piston Pin 648-11633-00-00 Impeller 47-803630T/803630T Piston Ring 676-11610-10 0.25