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 service kit is designed for Johnson/Evinrude 35 HP to 60 HP 2-Stroke outboard engines manufactured between 1979 and 1994. It provides a complete solution for servicing or rebuilding your engine's cooling system pump.

This kit is a direct replacement for multiple OEM part numbers, including Johnson/Evinrude 439077, 396933, 396932, 391635, 390770, and 777808.

• Complete Service Kit: Includes the impeller, housing, wear plate, gaskets, seals, and all necessary hardware for a full replacement.
• High-Performance Impeller: Features a durable, high-performance neoprene rubber impeller with 6 blades for efficient water flow.
• Direct Fit Installation: Engineered as a direct OEM-equivalent replacement, ensuring proper fit and function without modifications.

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

Installation Guide

Follow these general steps for installation. It is always recommended to consult your engine's service manual for detailed instructions.

1. Safety First: Disconnect the battery and remove the propeller before starting work.
2. Access the Lower Unit: Drain the gearcase lubricant. Unbolt and carefully lower the gearcase/lower unit from the outboard's midsection.
3. Remove the Old Pump: Unbolt and remove the existing water pump housing. Take note of the position of all parts.
4. Inspect and Clean: Remove the old impeller, gaskets, wear plate, and seals. Clean all mating surfaces thoroughly.
5. Install New Components: Install the new wear plate and gasket. Slide the new impeller key onto the driveshaft and then install the new impeller, turning the shaft clockwise to seat the vanes.
6. Install New Housing: Place the new gasket and housing over the impeller. Apply a non-hardening sealant to the bolts and tighten them to the manufacturer's specified torque.
7. Reassemble Lower Unit: Reinstall the lower unit, ensuring the water tube and shift shaft are correctly aligned. Torque the bolts to specification.
8. Final Checks: Refill the gearcase with fresh lubricant. Reconnect the battery. Start the engine using a water supply (flushing muffs or in water) and confirm a steady stream of water from the tell-tale outlet.

Troubleshooting & FAQ

How do I confirm this kit will fit my exact engine?
Start by checking your engine's horsepower, model, and year against our compatibility table. Pay close attention to the "Notes" column, as some models have exclusions (e.g., "Not for models with Lever Operated Gas Assist Tilt"). If you are unsure of your engine's details, use the Johnson/Evinrude serial number guide linked above to identify it.

What are the signs of a failing water pump impeller?
Common symptoms include the engine overheating at idle or low speeds, and a weak or intermittent water stream from the "tell-tale" outlet. If you notice either of these, inspect your water pump immediately to prevent engine damage.

How often should the water pump impeller be replaced?
As a general maintenance guideline, we recommend replacing the impeller every 1 to 2 years, or after every 100-200 hours of use. This interval can vary depending on operating conditions, such as use in saltwater or sandy/silty water, which can accelerate wear.

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.