Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 66T-11636-00 0.50 Viewer:949 OEM No. : 66T-11636-00-0.50 For YAMAHA Outboard 40 HP E40 40X You May Also Be Interested In Piston Kit 6F5-11636-00 0.50 Piston Kit 6L1-11642-11 STD Dog Clutch 6D8-45631-00-00 Gasket 6E5-14198-A2-00