Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 6F5-11635-00 0.25 Viewer:1300 OEM No. : 6F5-11635-00-0.25 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Kit 61N-11631-00 STD Piston Kit 6R5-11645-01 0.25 Gasket, Manifold 6E5-41135-00-00/6E5-41135-A0-00 Handle, Transom Clamp 6E0-43118-01-00