Sierra 18-3420 Water Pump Base for MR & Alpha One Drives
Sierra Marine$44.89
- SKU:
- F005923
- MPN:
- 18-3420
1
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The Sierra 18-3420 is a replacement water pump base for MerCruiser MR and Alpha One sterndrives built between 1985 and 1990. It restores proper water flow through the drive's cooling system.
Cast from aluminum for durability, it replaces OEM part 46-44292A3 and is covered by Sierra's customer-satisfaction warranty. Verify fitment against your application before ordering.
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