Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 682-11635-00 0.25 Viewer:812 OEM No. : 682-11635-00-0.25 For YAMAHA Outboard 9.9, 15 HP You May Also Be Interested In Piston Kit 6G5-11645-00 0.25 Piston Ring 688-11610-00 STD Lower Unit Gasket Set 398-87321-0/398873210M Piston Ring 6F5-11610-10/6F6-11610-10 0.25