Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 66T-11636-00 0.50 Viewer:948 OEM No. : 66T-11636-00-0.50 For YAMAHA Outboard 40 HP E40 40X You May Also Be Interested In Piston Kit 61N-11631-00 STD Piston Pin 648-11633-00-00 Fuel Pump Comp. 60V-13907-00-00 Gear 694-45570-00(23T)