Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6F5-11631-00 STD Viewer:932 OEM No. : 6F5-11631-00-STD For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Kit 6D0-11636-00 0.50 Piston Kit 679-11635-00 0.25 Oil Seal, SD-Type 93102-25M11-00 Gasket, Head Cover 63D-11193-A0-00