Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 61A-11635-00 0.25 Viewer:1400 OEM No. : 61A-11635-00-0.25 For YAMAHA Outboard 250 HP You May Also Be Interested In Piston Kit 6F5-11635-00 0.25 Piston Kit 624-11631-00 STD Piston Kit 6R5-11646-01 0.50 Valve, Water Pressure 17660-90J00-000