Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6H4-11636-01 0.50 Viewer:486 OEM No. : 6H4-11636-01-STD For YAMAHA Outboard 40, 50 HP You May Also Be Interested In Piston Ring 6E5-11610-00-00 STD Piston Kit 6F6-11635-00 0.25 Bearing 93315-43061-00 Gasket, Drive Shaft Housing 52113-93000-000/52113-93400-000