Category OMC Back Cover Gasket 340657 OMC Sterndrive Parts & Accessories Viewer:526 Item No: 340657 Similar fits No: OMC - 0340657 GLM - 37793 You May Also Be Interested In Grommet 333758 Adapter to Powerhead Gasket 328618 Piston Ring R09-661 Complete Gasket Kit HS-711283