Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 669-11631-00 STD Viewer:1223 OEM No. : 669-11631-00-STD For YAMAHA Outboard 9.9, 15 HP You May Also Be Interested In Piston Ring 664-11610-20 0.50 Piston Ring 656-11610-11 0.25 Bearing 93341-930V2-00 Diaphragm 6G1-24471-00-00