Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6H4-11636-01 0.50 Viewer:501 OEM No. : 6H4-11636-01-STD For YAMAHA Outboard 40, 50 HP You May Also Be Interested In Piston Ring 6E5-11610-10 0.25 Piston Ring 647-11610-20 0.50 Ball Bearing 30-95307/95307 Diaphragm 663-24411-00-00