Water Pump Impeller Kit – Fits Johnson/Evinrude 60-75 HP (Replaces 432955, 438597)

Water Pump Impeller Kit – Fits Johnson/Evinrude 60-75 HP (Replaces 432955, 438597)

This complete water pump impeller repair kit is designed for Johnson/Evinrude 3-cylinder 60-75 HP 2-Stroke engines (1979–2003) and 60-70 HP 4-Stroke engines (1998-up). It provides all the necessary components for a full service of the lower unit water pump assembly, ensuring your engine maintains proper cooling and performance.

This kit is a direct replacement for Johnson/Evinrude part numbers 432955 and 438597, as well as Sierra 18-3389 and Mallory 9-48213.

• Includes all necessary gaskets, seals, and hardware for a complete rebuild.
• Features a durable neoprene impeller and a corrosion-resistant metal housing.
• Installs in the lower unit to restore cooling system efficiency.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below. For Johnson/Evinrude owners, here’s a guide to help you identify your engine’s serial/model: Johnson/Evinrude Serial Number Guide.

Technical Specifications

Package Contents

• 1 x O-Ring (324981/326649/553127)
• 1 x Grommet (314008)
• 1 x Impeller (396725/389557/432954/437080)
• 1 x Seal (315748/341732)
• 1 x Wear Plate Gasket (336530)
• 1 x Housing (435673)
• 1 x Impeller Key (334897/331107)
• 1 x Wear Plate (319275/341038)
• 6 x Bolt Screw (302325/908158)

Installation Guide

1. Disconnect Power: Disconnect the engine's battery and shift the outboard into the neutral position.
2. Drop the Lower Unit: Remove the bolts securing the lower unit (gearcase) and carefully lower it from the driveshaft housing.
3. Access the Pump: Unbolt and remove the old water pump housing to expose the impeller.
4. Remove Old Components: Take out the old impeller, impeller key, wear plate, and gaskets. Note their orientation.
5. Clean Surfaces: Thoroughly clean the driveshaft and all mating surfaces where the new components will sit.
6. Install New Plate & Gasket: Place the new wear plate and gasket onto the pump base.
7. Install Impeller & Key: Slide the new impeller key into the driveshaft keyway. Install the new impeller by pushing down and twisting it clockwise to seat the vanes correctly inside the housing.
8. Secure New Housing: Install the new housing and seals, then tighten the bolts to the manufacturer's recommended torque specifications.
9. Reinstall Lower Unit: Carefully guide the lower unit back into place, ensuring the driveshaft, shift shaft, and water tube align correctly. Secure it with the mounting bolts.
10. Test Operation: Reconnect the battery, supply water to the engine using flushing muffs, and start it to check for a strong, steady water stream from the telltale outlet.

Troubleshooting & FAQ

How do I confirm this kit fits my Johnson/Evinrude engine?
This kit is designed for Johnson/Evinrude 3-cylinder 60-75 HP 2-Stroke (1979–2003) and 60-70 HP 4-Stroke (1998-up) engines. Please verify your specific model and year against the "Compatible Engine Models" table. Using the OEM part number 432955 or 438597 for cross-reference is the most reliable method.

What are the signs of a failing water pump impeller?
Common signs include a weak or non-existent water stream from the "telltale" outlet, engine overheating alarms, or a melted/brittle impeller during visual inspection. Reduced engine performance at high RPMs can also indicate poor water circulation.

How often should the water pump impeller be replaced?
For preventative maintenance, it is recommended to inspect the impeller annually and replace it every 1-2 years or every 100-200 hours of use, depending on operating conditions (e.g., saltwater vs. freshwater).

OEM vs. Aftermarket?
This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

How fast do you ship and how much does it cost?
We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

What is your warranty and return policy?
This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.