Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 66T-11636-00 0.50 Viewer:963 OEM No. : 66T-11636-00-0.50 For YAMAHA Outboard 40 HP E40 40X You May Also Be Interested In Piston Kit 6R5-11646-11 0.50 Piston Kit 6G0-11631-00 STD Piston Kit 6H3-11635-01 0.25 Bush, Propeller/Damper Rubber, Propeller 683-45981-00-00