Water Pump Impeller Repair Kit – Fits Johnson/Evinrude 35-60 HP (Replaces 439077, 396933)

Water Pump Impeller Repair Kit – Fits Johnson/Evinrude 35-60 HP (Replaces 439077, 396933)

This water pump impeller repair kit is designed for Johnson/Evinrude 35-60 HP, 2-Stroke outboard motors manufactured between 1979 and 1994. It provides a reliable solution for maintaining your engine’s cooling system to prevent overheating.

This kit serves as a direct replacement for Johnson/Evinrude part numbers 439077 / 0439077 and 396933 / 0396933, as well as aftermarket parts Sierra 18-3399 and Mallory 9-48207.

• Includes all necessary components for a complete water pump rebuild.
• Engineered as a direct-fit replacement for the original housing and impeller.
• Constructed from durable metal alloy and neoprene rubber for longevity.

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 Impeller (777214/396809)
• 2 x Impeller Key Wedge (Black and White)
• 1 x Housing (384087/18-3336)
• 1 x Liner (320775)
• 1 x Plate (320776)
• 1 x Wear Plate (320981/18-3343)
• 1 x Gasket (336530/18-2709)
• 1 x O-Ring (339543/303059/18-7134)
• 1 x Grommet, Water Tube (315837/18-3337)
• 1 x Housing Grommet (341732)
• 1 x Seal (315788)
• 1 x Bracket (315838)
• 2 x Screw (Short) (319126/18-3369)
• 2 x Screw (Long) (909533/18-3365)

Installation Guide

1. Disconnect Power: Disconnect the battery before starting work.
2. Remove Lower Unit: Carefully detach the lower gearcase unit from the outboard motor.
3. Access Pump: Unbolt and remove the old water pump housing assembly.
4. Remove Old Components: Take out the old impeller, impeller key, wear plate, and gasket. Note their orientation.
5. Clean Surfaces: Thoroughly clean the mating surfaces to ensure a proper seal with the new components.
6. Install New Gasket & Plate: Place the new gasket and wear plate onto the gearcase.
7. Install New Impeller: Slide the new impeller key into the driveshaft and then slide the new impeller on, rotating it in the direction of engine operation.
8. Install Housing: Fit the new housing, liner, seals, and grommets over the impeller, ensuring the components are seated correctly.
9. Secure Housing: Tighten the housing bolts evenly to the manufacturer's recommended torque settings.
10. Reassemble: Reinstall the lower unit onto the outboard motor.
11. Test Operation: Reconnect the battery. Start the engine in water and verify a strong, consistent stream of water from the tell-tale outlet.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my Johnson/Evinrude engine?
A: Check the "Compatible Engine Models" table on this page. Verify your engine's model, horsepower, and year range. This kit fits specific 35-60 HP 2-stroke models from 1979–1994. Using your engine's serial number can also help confirm the correct part.

Q: What are the signs of a failing water pump impeller?
A: Common signs include a weak or non-existent water stream from the "tell-tale" outlet, engine overheating alarms, and reduced engine performance. A visual inspection may show brittle, cracked, or missing impeller vanes.

Q: How often should I replace my water pump impeller?
A: As a general rule, it's recommended to inspect and/or replace your water pump impeller every one to two years, or every 100-200 hours of use, to prevent engine damage from overheating.

Q: OEM vs. Aftermarket?
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.