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Sierra 18-3322 Water Pump Kit for Mercury & Mariner Outboards

Manufacturer

Picture for manufacturer Sierra

Part Number

18-3322
10 reviews
Sale Price

$85.88

In Stock (5)

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Usually delivered within 2 days

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Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-3322 is a complete water pump kit designed as a direct replacement for Mercury and Mariner outboard engines. It replaces OEM part number 46-77516A3 and is engineered to meet or exceed original equipment manufacturer (OEM) specifications, ensuring reliable cooling system performance.

This comprehensive kit includes everything needed for a full water pump service, eliminating the need to source individual components separately. All included parts are manufactured to Sierra's quality standards for fit, function, and durability in marine environments.

Kit Includes:

  • Impeller (18-3007)
  • Upper Pump Housing (18-3118)
  • Water Pump Base (18-3422)
  • Impeller Plate (18-3107)
  • Lower Water Pump Base to Face Plate Gasket (18-2823)
  • Upper Face Plate to Pump Body Gasket (18-2824)
  • Water Pump Base Gasket (18-2825)
  • Water Pump Base Gasket (18-2841)
  • Drain Screw Gaskets (18-2945)
  • Rubber Washer / Drain Plug (18-2948)
  • O-Ring (18-7115)
  • O-Ring (18-7155)
  • O-Ring (18-7174)
  • Exhaust Leg Rubber Seal (18-0539)

Cross-Reference Part Numbers:

  • Mercury Marine OEM: 46-77516A3
  • GLM: 12170
  • Mallory: 9-48303

Regular water pump servicing is critical to preventing engine overheating. Impellers can lose elasticity over time, especially after extended storage or seasonal lay-up. Sierra recommends replacing the water pump kit every 100 operating hours or at least once per season to maintain optimal cooling system performance.

Autoplicity had the part I needed. They had the best price I found. Shipping was a little slow. Overall I am very satisfied with the transaction and will be buying from them in the future.

So far I love everything that is taking place

Really Good. The right battery for my motorcycle.

Always really great prices from these guys. Believe me, I always look around and always come back to autoplicity. I ordered a super heavy part and shipping was very reasonable. This is my 5th order with these guys. Very happy customer.

FAST, EASY

Very smooth shopping experience

Finally I found the part I have searched all over for. Thank you autoplicity for having such a specialized part. Great customer service too. Very easy to use web site as well.

Very fast

Great info and easy to use web site

Great first order

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