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Sierra 18-3380 390770 Marine Outboard Water Pump Kit

Manufacturer

Picture for manufacturer Sierra

Part Number

18-3380
12 reviews
Sale Price

$69.84

In Stock (8)

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Usually delivered within 2 days

free shipping

FREE SHIPPING

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sierra 18-3380 is a complete water pump kit designed as a direct replacement for Johnson/Evinrude outboard engines, cross-referencing OEM part number 390770. Sierra marine parts are engineered to meet or exceed original equipment manufacturer specifications, ensuring reliable cooling system performance on the water.

This kit includes all necessary components to fully restore your outboard's water pump, making it an ideal choice for routine maintenance or when replacing a worn or damaged impeller assembly. Using a complete kit ensures all seals, gaskets, and wear components are replaced simultaneously for maximum reliability.

Key Features:

  • Direct OEM replacement — cross-references part number 390770
  • Engineered to meet or exceed OEM specifications
  • Complete kit includes impeller, housing, seal, and associated hardware
  • Manufactured by Sierra, a trusted name in marine aftermarket parts
  • Helps maintain proper engine cooling and prevent overheating
  • Ideal for scheduled water pump maintenance or emergency replacement

Regular water pump service is critical to outboard engine longevity. Replacing the impeller and associated components at recommended intervals helps prevent overheating and costly engine damage. The Sierra 18-3380 kit provides everything needed for a complete, professional-quality service.

Easy to shop

Quick screen load times and intuitive interface makes for easy site navigation.

Good price and free shipping!

Very pleased with the service and quick shipping. Checked out through Amazon payments without any issues. Item ordred was the Hella Supertone Horns. Arrived in original box and packaging. Will not hesitate to order from Autoplicity in the future.

Fast and accurate

Very easy to use website. That is hard to find these days. Thank you for keeping it simple.

Hope I get the parts I expect some of the description is hard to interpret.

A little hard to find exactly what you're looking for but good prices.. I placed an order for two products that were shipped separately. One was delivered quite quickly and the other took a lot longer. The orders were correct and the products were correct

Thank you

It was quick and easy!

I hate ordering things online but this is the easiest it's ever been however on delivery the headers I ordered were a bit scratched up. Nothing some header paint won't fix though.

very fast

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