Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6H4-11636-01 0.50 Viewer:510 OEM No. : 6H4-11636-01-STD For YAMAHA Outboard 40, 50 HP You May Also Be Interested In Piston Ring 664-11610-00 STD Piston Ring 66T-11604-00 0.25 Float 6L2-14385-00-00 Fuel Meter Assembly 6Y1-24260-12-00