Water pump kit for Mercruiser Alpha Gen-2 sterndrive - full kit with housing
Sierra 18-3147. Corresponds to Mercury Marine 81275--. Applicable to Alpha Gen-2 sterndrives, c.1990-up, serial numbers 0D469859-up. This excellent-quality kit is for full replacement of the lower-unit water pump, including stainless-steel housing in case it's become damaged.
Inspection and rebuilding or replacing the water-pump should be done on a 4-5-year cycle.
Aftermarket Sierra kits are noted for their very high quality and precision in matching the application. The rubber of the impeller is as good as or better than that used by Mercury Marine. Buy it with confidence!