Water Pump Impeller Kit – Fits Johnson Evinrude 5.5, 6, 7.5 HP (Replaces 763758)

Water Pump Impeller Kit – Fits Johnson Evinrude 5.5, 6, 7.5 HP (Replaces 763758)

This water pump impeller kit is designed for Johnson/Evinrude 5.5 HP, 6 HP, and 7.5 HP 2-stroke outboard motors manufactured between 1954 and 1979. It provides the essential components to restore your engine's cooling system for optimal performance and reliability.

It serves as a direct replacement for Johnson/Evinrude part numbers 763758, 391391, 382797, and 778166.

• Engineered for direct OEM replacement to ensure straightforward installation.
• The complete kit includes a new impeller, housing, liner, plate, and seals.
• Features a durable, 6-blade impeller designed for efficient water circulation.

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

• 1 x Water Pump Housing
• 1 x Impeller
• 1 x Pump Housing Liner and/or Plates
• 1 x Grommet
• Associated O-Rings and Seals

Installation Guide

1. Disconnect the negative battery cable before starting work.
2. Drain the gearcase lube from the lower unit.
3. Remove the bolts connecting the lower unit to the engine's upper leg and carefully lower it.
4. Unscrew the bolts on the water pump housing and lift it off the driveshaft.
5. Remove the old impeller, wear plate, and any gaskets. Note their orientation.
6. Clean the mating surfaces of any debris or old gasket material.
7. Install the new wear plate and gasket, followed by the new impeller. Turn the driveshaft clockwise to set the blades correctly.
8. Apply a light coat of marine grease to the inside of the new housing and install it.
9. Tighten the housing bolts to the manufacturer's specified torque.
10. Reattach the lower unit, refill it with fresh gear lube, and reconnect the battery.
11. Start the engine using a water supply and confirm a steady stream of water from the tell-tale port.

Troubleshooting & FAQ

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

A: This kit is made for Johnson/Evinrude 5.5, 6, and 7.5 HP 2-stroke outboards from 1954-1979. To ensure a perfect match, please check the "Compatible Engine Models" table and verify that your existing part number corresponds with one of the listed direct replacements (763758, 391391, etc.).

Q: What are the signs that my water pump impeller needs to be replaced?

A: The most common indicators of a failing impeller are engine overheating, especially at low speeds, or a significantly weakened or nonexistent water stream from the engine's tell-tale outlet. A visual inspection may also reveal cracked, brittle, or worn-down impeller blades.

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

A: As a key part of preventative maintenance, we recommend inspecting the impeller annually and replacing it every 1-2 years or every 100-200 hours of use. Replacement frequency should be increased if you operate primarily in saltwater or in water with heavy sediment.

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.