Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 61A-11645-00 0.25 Viewer:1301 OEM No. : 61A-11645-00-0.25 For YAMAHA Outboard 250 HP You May Also Be Interested In Piston Kit 6F6-11631-00 STD Piston Kit 679-11636-00 0.50 Gasket, Muffler 66K-45123-00-00 Gasket 61A-24564-00-00