Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6F6-11636-00 0.05 Viewer:1123 OEM No. : 6F6-11636-00-0.50 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Pin 663-11633-00-00 Piston Kit 675-11631-00 STD Gasket 688-14198-A1-00 Water Pump Key 09420-04009