OMC Back Screw 331979 OMC Sterndrive Parts & Accessories Viewer:661 Item No: 331979 Similar fits No: OMC - 0331979 / 0777860 Sierra - 18-3133 Mallory - 9-48218 GLM - 22323 You May Also Be Interested In Exhaust Bellows Tube 3852741 Sealing Ring 0853868 Top End Gasket Kit For VG-5029 Nut, Self-Locking 90185-12058