Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6H4-11635-09 0.25 Viewer:468 OEM No. : 6H4-11635-09-0.25 Similar Number: YAMAHA No: 6H4-11635-00 For YAMAHA Outboard 40, 50 HP You May Also Be Interested In Piston Kit 679-11635-00 0.25 Piston Kit 679-11631-00 STD Gasket, Water Pump 689-44315-01-00/689-44315-A0-00 Tilt Trim Motor 6H5-43880-02-00