Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 679-11635-00 0.25 Viewer:878 OEM No. : 679-11635-00-0.25 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Kit 61A-11642-01 STD Piston Kit 669-11631-00 STD Gasket, Exhaust Inner Cover 6F5-41112-00/6F5-41112-A0 Piston Kit 700-834800A6/834800A 6 0.030