Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Ring 6H4-11610-10-00 0.25 Viewer:1069 OEM No. : 6H4-11610-10-00-0.25 For YAMAHA Outboard 40, 50 HP You May Also Be Interested In Piston Kit 6R5-11636-11 0.50 Piston Kit 679-11631-00 STD Gasket, Cylinder Head 682-11181-00/682-11181-01 Carburetor 16100-ZW6-716