Mercury-Mercruiser 57234A-1 Water Pump Base Assembly

Mercury-MerCruiser 46-57234A1 Water Pump Base Assembly

The Mercury-MerCruiser 46-57234A1 Water Pump Base Assembly is a replacement water pump base for select MerCruiser MC-I and R drives. This assembly fits 1970-1984 MC-I and R drive applications without a flush screw in the housing where specified by the Mercury-MerCruiser parts diagram.

The water pump base is an important cooling system component that helps support proper water pump function and cooling water flow through the sterndrive. Replacing a worn, damaged, cracked, or leaking water pump base can help restore reliable cooling system performance during drive service.

Product Features:

• Mercury-MerCruiser water pump base assembly
• Fits select MerCruiser MC-I and R drives
• Designed for applications without a flush screw in the housing
• For 1970-1984 compatible drive applications where specified
• Helps replace a worn, cracked, damaged, or leaking original water pump base
• Supports proper water pump operation and cooling water flow

Product Details:

• Brand: Mercury-MerCruiser
• Manufacturer Part Number: 46-57234A1
• Listing Part Number: 46-57234A-1
• Part Type: Water Pump Base Assembly
• System: Water pump / cooling system
• Application: MerCruiser MC-I and R drives without flush screw in housing
• Model Years: 1970-1984 where specified

Fits Select MerCruiser Applications:

• MC-I drives without flush screw in housing, 1970-1984 where specified
• R drives without flush screw in housing, 1970-1984 where specified

Replaces / Interchange:

• GLM 12310
• Mallory 9-43306
• OMC 0508398
• Redline RL3417
• Sierra 18-3417

Service Note: See your owner’s manual or service manual for water pump inspection, base replacement, gasket placement, installation procedure, and cooling system checks for your specific drive.

Fitment Note: Water pump base assembly fitment should be verified by drive model, model year, serial number, water pump housing style, flush screw configuration, parts diagram, and existing part number before ordering. Please confirm this water pump base assembly is correct for your MerCruiser MC-I or R drive before purchasing.

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