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

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

This water pump impeller repair kit is designed for Johnson/Evinrude 2-stroke outboard engines from 35 HP to 60 HP, covering models manufactured between 1979 and 1994, including commercial versions.

It serves as a direct replacement for multiple OEM and aftermarket part numbers, including Johnson/Evinrude 439077, 396933, 390770, 396932, 391635, and 777808, as well as Sierra 18-3399 and Mallory 9-48204/9-48207.

• Includes a high-performance 6-blade neoprene impeller and marine-grade alloy housing.
• Provides a complete solution for replacing the entire water pump assembly.
• Engineered for direct OEM replacement to ensure proper fit and function.

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 Serial Number Guide.

Technical Specifications

Package Contents

This kit includes the following components:

• 1 x Water Pump Housing (384087)
• 1 x Impeller (396809)
• 1 x Wear Plate (320981)
• 1 x Gasket (336530)
• 1 x O-Ring (303059)
• 1 x Grommet (315837)
• 2 x Screw, Short (319126)
• 2 x Screw, Long (909533)
• 1 x Seal (315748)
• 1 x Pump Cup/Liner (320775)
• 1 x Water Tube Guide/Bracket (315838)
• 1 x Grommet, Housing (341732)
• 1 x Key (331901)
• 1 x Key (344470)

Installation Guide

1. Disconnect Power: Disconnect the battery and shift the outboard into neutral.
2. Access Lower Unit: Remove the bolts securing the lower unit (gearcase) to the upper driveshaft housing.
3. Separate Gearcase: Carefully lower and separate the gearcase to expose the water pump assembly.
4. Remove Old Pump: Unbolt and remove the old water pump housing, impeller, and wear plate. Take note of the blade direction of the old impeller.
5. Clean Surfaces: Thoroughly clean the mating surfaces on the gearcase and driveshaft, removing any old gasket material or debris.
6. Install New Components: Place the new gasket and wear plate onto the gearcase. Install the new impeller key onto the driveshaft.
7. Install New Impeller: Slide the new impeller onto the driveshaft. Turn the shaft clockwise while pushing down to correctly orient the blades inside the new housing cup/liner.
8. Secure New Housing: Place the new housing over the impeller assembly and secure it with the provided screws, tightening them evenly.
9. Reassemble: Re-install the gearcase, ensuring the water tube, shift rod, and driveshaft are properly aligned.
10. Final Tightening: Tighten all gearcase bolts to the manufacturer's specified torque.
11. Test Operation: Reconnect the battery and test the engine in a suitable water source, confirming a strong, steady stream from the tell-tale outlet.

Troubleshooting & FAQ

Q: How can I be sure this kit fits my Johnson/Evinrude engine?
A: This kit is for specific Johnson/Evinrude 35–60 HP 2-stroke models from 1979–1994. Please check the "Compatible Engine Models" table and cross-reference your engine's model, horsepower, and year. Note the exclusions for certain models with a "Lever Operated Gas Assist Tilt."

Q: What are the signs my water pump needs to be replaced?
A: Common signs of a failing impeller include a weak or non-existent water stream from the engine's tell-tale outlet, engine overheating alarms, or a melted plastic water pump housing.

Q: How often should I replace the water pump impeller?
A: For preventative maintenance, it is recommended to inspect and replace the water pump impeller every 1-2 years or every 100-200 hours of operation, especially if you frequently operate in saltwater or debris-heavy water.

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.