Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 689-11631-00 STD Viewer:914 OEM No. : 689-11631-00-STD For YAMAHA Outboard 25, 30 HP You May Also Be Interested In Piston Kit 6H4-11631-09 STD Piston Kit 679-11636-00 0.50 Gasket, Cylinder Head 6G8-11181-00-00 Circlip, Inner 93450-15023-00