Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 679-11631-00 STD Viewer:782 OEM No. : 679-11631-00-STD For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Kit 664-11636-00 0.50 Piston Kit 624-11631-00 STD Power Head Gasket Set 3AB-87121-0/3AB871210M Diaphragm 648-24411-00-00