Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 682-11635-00 0.25 Viewer:827 OEM No. : 682-11635-00-0.25 For YAMAHA Outboard 9.9, 15 HP You May Also Be Interested In Piston Kit 689-11631-00 STD Piston Kit 644-11631-03 STD Needle Valve 61N-14392-00-00 Bearing Assembly 31-816773A2/816773A 2