Water Pump Impeller – Fits Evinrude/Johnson 40-75 HP (1975-1978) (Replaces 382547)

Water Pump Impeller – Fits Evinrude/Johnson 40-75 HP (1975-1978) (Replaces 382547)

This water pump impeller is designed for Evinrude/Johnson 40-75 HP 3-Cylinder outboard motors manufactured between 1975 and 1978 that require a replacement water pump impeller.

It serves as a direct replacement for multiple OEM and aftermarket part numbers, ensuring a precise fit and reliable performance for your engine's cooling system.

• Installation: Direct replacement for a straightforward installation.
• Function: Engineered specifically for raw water cooling systems.
• Included: Comes with one high-quality rubber impeller.

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 (Replaces 382547, 765431, 777824)

Explosion Diagram

Installation Guide

1. Disconnect the battery and unhook the shift linkage.
2. Carefully unbolt and remove the lower unit (gearcase) from the outboard motor.
3. Locate the water pump assembly on top of the lower unit and remove its housing bolts.
4. Slide the housing up and off, then remove the old impeller. Note the rotational direction of the old impeller's vanes.
5. Clean the inside of the pump housing and apply a thin layer of marine grease.
6. Install the new impeller by pushing down while turning it clockwise to bed the vanes correctly.
7. Reassemble the pump housing, ensuring all seals are correctly seated, and tighten bolts to specification.
8. Reinstall the lower unit, reconnect the shift linkage, and test the engine on a water supply to confirm proper water flow.

Troubleshooting & FAQ

How do I confirm this impeller fits my Evinrude/Johnson engine?
Check the 'Compatible Engine Models' table on this page. This impeller fits 40-75 HP, 3-cylinder models from 1975 to 1978. Also, verify your original part number matches one listed in the 'Part Number Cross-Reference' table, such as OEM part 382547.

What are signs that my water pump impeller is failing?
Common signs include the engine overheating, a weak or non-existent water stream from the "telltale" outlet, and visible damage like cracked, brittle, or worn-down rubber vanes on the old impeller upon inspection.

How often should I replace my water pump impeller?
For preventative maintenance, we recommend replacing the impeller every one to two years, or every 100-200 hours of use. Replacement frequency depends on operating conditions (e.g., saltwater use may require more frequent changes).

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.