Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6F6-11631-00 STD Viewer:847 OEM No. : 6F6-11631-00-STD For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Ring 688-11603-A0-00 STD Piston Kit 688-11631-81 STD Anode 41109-ZW-B03 Propeller Shaft 57610-94401-000