Sierra 18-3056 Mercury MerCruiser Water Pump Impeller

The impeller is the one part that will strand you for the price of a lunch. Rubber vanes take a set sitting in the pump housing all winter, then tear or glaze the first time you run dry on the trailer, and by the time the alarm sounds the powerhead has already been hot. Sierra builds this one to OEM specification as a direct replacement.

• Fits Alpha I Generation 2 serial D494569 and above, MerCruiser Vazer, 30/40/45/50/60 four stroke Bigfoot, 60 three cylinder Bigfoot, and 75-125 three and four cylinder models A996142 and up.
• Also covers 75/90/115 four stroke, 150 EFI four stroke, V-200 3.0L DFI and V-225/250 3.0L.
• Key included per Sierra's published part detail.
• Interchanges with Mercury 47-430261, 47-430262, 47-430264, 47-43026B2, 47-43026T2, Mallory 9-45307 and GLM 89630.

Replace it on a schedule, not on failure, and change the housing gasket and the wear plate at the same time. Verify the application against your serial number before ordering.