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 water pump impeller rebuild kit provides a complete solution for servicing the lower unit water pump on a wide range of Johnson and Evinrude outboard engines. It is designed to fit 60 HP 2-Stroke (1986–2001), 60-70 HP 4-Stroke (1998+), 65 HP 2-Stroke (1979–2001), 70 HP 2-Stroke (1979–1994), and 75 HP 2-Stroke (1979–1988) models.

This kit is a direct replacement for multiple OEM and aftermarket part numbers, including Johnson/Evinrude 432955, 436957, 438597, 0438951; Sierra 18-3389; and Mallory 9-48213.

• Includes all necessary components for a full rebuild, including the housing, impeller, wear plates, gaskets, and seals.
• Engineered for a direct OEM replacement fit, ensuring proper installation in the lower unit.
• Restores cooling system performance to prevent engine overheating and maintain reliability.

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 Grommet (18-2703)
• 1 x Oil Seal (18-2705)
• 1 x Wear Plate Gasket (18-2709)
• 1 x Impeller with Wedge Key (18-3053)
• 1 x Wear Plate (18-3126)
• 1 x Impeller Plate (18-3127)
• 1 x Water Pump Housing (18-3129)
• 1 x Stainless Steel Bolt (18-3133)
• 1 x Impeller Key (18-3138)
• 1 x Impeller Key (18-3299)
• 1 x O-Ring (18-7174)
• 1 x O-Ring (18-7481)

Installation Guide

1. Safety First: Disconnect the battery and remove the propeller before starting.
2. Drain Gear Lube: Place a drain pan under the lower unit and remove the upper and lower gear lube drain screws to drain the oil.
3. Drop the Lower Unit: Remove the bolts securing the lower unit to the engine's midsection. Carefully lower the unit and disconnect the shift shaft if necessary.
4. Access the Water Pump: With the lower unit on a workbench, remove the bolts securing the water pump housing.
5. Remove Old Components: Lift off the housing and slide the old impeller off the driveshaft. Remove the wear plate, gaskets, and seals. Note the orientation of all parts.
6. Clean and Inspect: Thoroughly clean all mating surfaces and inspect the driveshaft for any scoring or damage.
7. Install New Parts: Assemble the new components in reverse order. Lightly grease the new impeller and install the new wedge key, gaskets, seals, and wear plate.
8. Seat the Impeller: When installing the housing over the new impeller, rotate the driveshaft clockwise to help the impeller vanes fold correctly into place.
9. Reassemble: Torque the housing bolts to the manufacturer's specification. Reattach the lower unit to the engine, ensuring the driveshaft, water tube, and shift shaft are correctly aligned.
10. Refill and Test: Install the new drain screw gaskets and refill the lower unit with the correct gear lube. Start the engine using a water supply (flushing muffs) and check for a strong, steady water stream from the tell-tale.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my specific engine?

A: The best way is to check the "Compatible Engine Models" table on this page. Cross-referencing your engine's model, HP, and year is the most reliable method. You can also verify by matching the part numbers listed in the "Part Number Cross-Reference" table with your existing part.

Q: What are the common signs of a failing water pump impeller?

A: The most common symptom is engine overheating, especially at low speeds or idle. You may also notice a weak or nonexistent water stream from the "tell-tale" outlet. A brittle, cracked, or deformed impeller upon inspection confirms the need for replacement.

Q: How often should I replace my water pump impeller?

A: As a general maintenance rule, it's recommended to replace the impeller every 1-2 years or every 100-200 hours of operation. This interval should be shorter if you frequently operate in saltwater, silty, or sandy conditions.

Q: Is this an OEM part or an aftermarket 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.

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.