Sierra 18-4531 Water Pump Repair Kit Without Housing for Mercury Outboards

Manufacturer

Sierra

Part Number

18-4531
03/13/2036 1:20 AM
Sale Price

$40.56

In Stock (9)

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Usually delivered within 2 days

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No Hassle Returns

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Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-4531 is a complete water pump rebuild kit designed for Mercury and Mariner outboard engines. This comprehensive repair kit contains all the essential components needed to service your water pump without replacing the entire housing assembly, making it a cost-effective maintenance solution.

Kit Includes:

  • Impeller (Sierra 18-3057)
  • Short seal 1 3/4"
  • Long seal 2 1/4"
  • Upper water pump gasket
  • Lower water pump gasket
  • Wear plate
  • Washers (2)

Compatibility:

  • Mercury 25 HP (4-Stroke)
  • Mercury 30 HP (2 Cylinder and 4-Stroke)
  • Mercury 40 HP (2 Cylinder, 3 Cylinder, and 4-Stroke)
  • Mercury 50 HP (3 Cylinder, 4-Stroke, and Bigfoot 4-Stroke)

This kit replaces Mercury OEM part numbers 821354A1 and 821354A2. Regular water pump maintenance is critical for preventing engine overheating and ensuring reliable performance on the water.

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