OMC Back Water Cover Gasket 329920 OMC Sterndrive Parts & Accessories Viewer:334 Item No: 329920 Similar fits No: OMC - 0329920 / 0777393 Sierra - 18-2905 GLM - 34580 You May Also Be Interested In Impeller Housing 438544 Impeller Housing Plate 318995 Propeller Nut 11-16147 Bearing 93306-00702