Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6F6-11635-00 0.25 Viewer:857 OEM No. : 6F6-11635-00-0.25 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Kit 6F8-11631-00 STD Piston Kit 6H3-11636-01 0.50 Piston Pin 6H3-11633-00-00 Gasket, Cylinder Head 3V1-01005-0/3V1010050M