Shop by Brand Yamaha OutboardPiston/Piston Kit ; Piston Pin ; Piston Ring Back Piston Kit 679-11635-00 0.25 Viewer:854 OEM No. : 679-11635-00-0.25 For YAMAHA Outboard 40 HP You May Also Be Interested In Piston Kit 6R5-11646-11 0.50 Piston Kit 6R5-11635-01 0.25 Gasket 27-81293910/81293910 Crankshaft Comp under 12240-91L30-000