Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 682-11635-00 0.25 Viewer:825 OEM No. : 682-11635-00-0.25 For YAMAHA Outboard 9.9, 15 HP You May Also Be Interested In Piston Kit 664-11636-00 0.50 Piston Kit 688-11631-02 STD Oil Seal, SO-Type 93104-20M02-00 Tab, Trim 69L-45371-00-00