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.

This kit is a direct replacement for Johnson/Evinrude part numbers 432955 and 438597. It also serves as an aftermarket replacement for Sierra 18-3389 and Mallory 9-48213.

• Includes all essential components for a complete water pump rebuild, including the housing, impeller, wear plate, seals, and gaskets.
• Engineered with a durable metal housing and a high-performance neoprene impeller for reliable cooling.
• Designed for installation in the lower unit of the outboard engine.

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 Water Pump Housing (Replaces 435673)
• 1 x Neoprene Impeller (Replaces 396725)
• 1 x Wear Plate (Replaces 321940)
• 1 x Wear Plate Gasket (Replaces 336530)
• 1 x Flywheel Key (Replaces 331107)
• 1 x Impeller Key (Replaces 334897)
• 4 x Bolts (Replaces 22360)
• 2 x Bolts (Replaces 22320)
• 1 x Water Seal (Replaces 315748)
• 1 x O-Ring (Replaces 324981)
• 1 x O-Ring (Replaces 326649)
• 1 x Grommet (Replaces 314008)
• 1 x Pump Housing Cup
• 1 x Coupling Guide/Tube

Installation Guide

1. Safety First: Before starting, disconnect the engine's battery and ensure the outboard is shifted into the neutral position.
2. Remove Lower Unit: Carefully unbolt and remove the lower unit assembly from the outboard's midsection. Be prepared for it to be heavy.
3. Access Pump Housing: Place the lower unit securely on a workbench and remove the bolts securing the water pump housing.
4. Disassemble Pump: Lift the old housing off the driveshaft. Slide the old impeller, keys, and wear plate off, taking note of their order and orientation.
5. Clean Surfaces: Thoroughly clean all mating surfaces. Scrape away any old gasket material or corrosion to ensure a proper seal.
6. Install New Components: Install the new wear plate gasket and wear plate. Insert the new impeller key into the driveshaft.
7. Install New Impeller: Slide the new neoprene impeller onto the shaft, rotating it clockwise to help seat the vanes inside the housing cup correctly.
8. Secure New Housing: Place the new housing, gasket, and other seals into position and secure them with the new bolts, tightening them to the manufacturer's specified torque.
9. Reinstall Lower Unit: Carefully reinstall the lower unit, ensuring the driveshaft, shift shaft, and water tube are properly aligned.
10. Test Operation: Reconnect the battery. Using a flush attachment or in the water, run the engine and check for a strong, steady stream from the water indicator (tell-tale) port to confirm correct operation.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my engine?
A: Please review the "Compatible Engine Models" table above. Cross-reference your outboard's brand, horsepower, stroke, and year range with the information provided to ensure a precise match.

Q: What are the signs of a failing water pump impeller?
A: Common symptoms include the engine overheating, a weak or intermittent water stream from the tell-tale (water indicator) port, or discovery of brittle, cracked, or deformed impeller vanes during a visual inspection.

Q: How often should I replace my water pump impeller?
A: For preventative maintenance, we recommend inspecting the impeller annually and replacing it every 2-3 years or 200-300 hours of use, whichever comes first. This helps prevent unexpected engine overheating and potential damage.

Q: Is this an OEM part?
A: 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.

Q: How fast do you ship and how much does it cost?
A: 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.

Q: What is your warranty and return policy?
A: 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. Damage due to improper installation is not covered by the warranty.

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 on quality.