Fits: O.M.C. 55-75 HP 3-cylinder. Replaces: OMC 384777, 386657, 391735, 585050, 585058, 586281. 9-tooth drive gear. Uses DV370* replacement drive gear, DVK70* 2-piece drive kit (fits current-model starters), SR370 repair kit. *NOTE: New OMC outboard starters use a 2-piece drive assembly while older O.M.C. outboard starters use a 1-piece drive assembly. When ordering starter drives make certain you choose the correct drive because the new and old style OMC drive assemblies are not interchangeable!