Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6F6-11631-00 STD Viewer:852 OEM No. : 6F6-11631-00-STD For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Pin 6H3-11633-00-00 Piston Kit 644-11631-03 STD Water Pump Repair Kit 17400-87D11-000 Piston Kit 682-11631-00 STD