Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6H4-11636-01 0.50 Viewer:487 OEM No. : 6H4-11636-01-STD For YAMAHA Outboard 40, 50 HP You May Also Be Interested In Piston Ring 688-11610-10 0.25 Piston Ring 61N-11605-00-00 0.50 Bearing 93306-00519-00 Gasket, Cylinder Head 11141-98411-000