Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 662-11631-01 STD Viewer:1145 OEM No. : 662-11631-01-STD For YAMAHA Outboard 9.9, 15 HP You May Also Be Interested In Piston Kit 6R5-11646-01 0.50 Piston Ring 6F5-11610-00-00/6F6-11610-00 STD Bearing 345-00113-0/345001130M Gasket, Pump Cover 369-03302-0/369033020M