Upper unit top cover assembly, casting number 94997-C2, is listed as the aftermarket 94997-C2 top cover for Mercruiser Alpha One Gen I sterndrives. This item is a used freshwater part described as not corroded, compatible with MerCruiser R/MR/Alpha One Gen I models from approximately 1983 to 1990. The top cover protects the upper gearcase and bearings from debris and moisture, helping seal the gear chamber and maintain proper lubrication. For fit confirmation, reference the associated top-cover listing (part number 94998A2) and the casting number 94997-C2 against your sterndrive configuration.
