Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Ring 6F5-11610-10/6F6-11610-10 0.25 Viewer:867 OEM No. : 6F5-11610-10/6F6-11610-10-0.25 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Kit 6R5-11636-01 0.50 Piston Ring 664-11610-10 0.25 Diaphragm 91748M Gasket, Valve Seat 13122-98500-000/13122-98501-000