Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 66T-11631-00 STD Viewer:968 OEM No. : 66T-11631-00-STD For YAMAHA Outboard 40 HP 40X E40 You May Also Be Interested In Piston Pin 6E7-11633-00 Piston Kit 677-11636-00 0.50 Piston Ring 676-11610-20 0.50 Roller, Wire 6F5-15752-00