Water Pump Impeller for Johnson/Evinrude 40–75 HP Outboards — Replaces 396725, 389557

Product Details

This water pump impeller is designed for selected Johnson and Evinrude outboard applications from 40 to 75 HP. The company fitment data covers 40 HP models from 1999 and newer, 50 HP models from 1998 and newer, 55 HP models from 1998 and newer, 60 HP models from 1986 and newer, 65 HP Commercial models from 1984 and newer, 70 HP models from 1979 and newer, and 75 HP models from 1979 through 1988.

Use the application ranges and part-number references below as a starting point, then verify the exact engine model, year, serial number, and existing impeller before ordering. Model-specific details can vary within the same horsepower range.

• Water pump impeller for selected Evinrude and Johnson outboards.
• Sold as one impeller; the company product record does not identify this listing as a kit or state that a drive key is included.
• Common reference number: Evinrude/Johnson/OMC/BRP 396725 and 0396725.
• Inspect the complete cooling-system assembly and replace related worn parts as needed during installation.

Part Number Matrix

The following manufacturer and aftermarket reference numbers are associated with this impeller listing. Number references are provided for identification and cross-referencing; confirm the exact application before purchase.

Engine & Model Compatibility

Company fitment is listed by brand, horsepower, and year range. Stroke designation, shaft length, and serial-number limits are not specified in the company record, so verify those details against your engine identification label and the original impeller before installation.

Technical Specs

Product Type

Water pump impeller

Application

Selected Johnson and Evinrude outboards

Rated horsepower range

40–75 HP, subject to the listed model and year ranges

Material

Not specified in the company product record

Dimensions

Not specified in the company product record

Drive key

Not included or listed as a package component in the company product record

Product configuration

Single impeller, not identified as a kit

What’s in the Box

• 1 x Water pump impeller

A drive key, gaskets, housing, wear plate, and other water-pump components are not listed as included with this product. Reuse only serviceable components and obtain any required additional parts separately.

Installation Notes

1. Disconnect the battery and follow the outboard manufacturer’s service procedure for removing the lower unit.
2. Remove the water-pump housing and inspect the old impeller, housing, wear plate, seals, and drive-key area.
3. Remove the old impeller and clean the mating surfaces before installation.
4. Verify that the replacement impeller matches the original part and water-pump housing before fitting it.
5. Install the impeller using the manufacturer’s specified procedure and lubricant, if applicable. Do not assume that a new drive key is included with this listing.
6. Reinstall the water-pump housing and lower unit using the manufacturer’s gaskets, torque values, and alignment procedures.
7. Run the engine with an appropriate water supply and confirm a strong cooling-water telltale and normal operating temperature before returning the boat to service.

Troubleshooting & FAQ

Safety & Important Info

• Verify the exact engine model, year, serial number, and original part before ordering.
• Do not rely on horsepower alone when selecting a replacement impeller.
• This listing is for one impeller only; a drive key and other water-pump service parts are not listed as included.
• Follow the outboard manufacturer’s service manual for disassembly, installation, torque, lubrication, and testing procedures.
• Professional installation is recommended when you are not familiar with lower-unit or water-pump service.

About Sea Sierra

Sea Sierra supplies marine replacement parts for routine outboard maintenance and repair. Please use the application information and reference numbers on this page to verify that the part is appropriate for your specific engine before purchase.