Water Pump Impeller – Fits Johnson/Evinrude 40–75 HP (Replaces 396725, 389557)

Water Pump Impeller – Fits Johnson/Evinrude 40–75 HP (Replaces 396725, 389557)

This high-quality water pump impeller is engineered to fit a wide range of Johnson & Evinrude outboard motors. It is specifically designed for 2-Stroke engines from 40 to 75 HP (1979–2006), as well as certain 60 HP 4-Stroke models (1989–2001) and 40-60 HP E-TEC models (2004+).

As a direct replacement for multiple OEM and aftermarket part numbers, this component ensures reliable performance for engine cooling systems. It is manufactured to match factory specifications for a precise fit and straightforward installation.

• Installation Method: Direct replacement for the original impeller.
• Included Components: The package contains the water pump impeller and may include the drive key.
• Materials: Constructed from durable, high-grade neoprene rubber for longevity and resistance to wear.

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.

Johnson/Evinrude 2-Stroke Engines

Johnson/Evinrude 4-Stroke Engines

Johnson/Evinrude E-TEC Models

Technical Specifications

Package Contents

This package includes the following items:

• 1 x Water Pump Impeller (0396725)
• 1 x Key (0334897) - Note: The key may not be included in all packages. Please verify contents upon receipt.

Explosion Diagram

Installation Guide

1. Safety First: Disconnect the engine's battery and ensure the engine is off and cool.
2. Remove Lower Unit: Unbolt and carefully remove the lower unit (gearcase) from the outboard motor's driveshaft housing.
3. Access Impeller: Locate the water pump housing on top of the lower unit and remove its cover bolts.
4. Remove Old Impeller: Carefully slide the old impeller off the driveshaft, paying attention to the direction of the blades. You may need to remove the drive key.
5. Clean & Inspect: Thoroughly clean the inside of the impeller housing and the wear plate. Inspect for scoring, cracks, or warping.
6. Install New Impeller: Slide the new impeller onto the driveshaft. Twist it in the direction of engine rotation (typically clockwise) to ease the blades into the housing.
7. Reassemble Pump: Secure the water pump housing cover with its bolts, ensuring an even and tight seal.
8. Reattach Lower Unit: Reinstall the lower unit, making sure the driveshaft, shift shaft, and water tube are correctly aligned.
9. Final Checks: Reconnect the battery. Start the engine in water and immediately check for a steady stream of water from the tell-tale outlet.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Johnson/Evinrude engine?
A: Check your engine's model, horsepower, and year against the "Compatible Engine Models" table. You can also verify the OEM part number (e.g., 396725) in your engine's service manual and cross-reference it with our part number list.

Q: What are the signs of a failing water pump impeller?
A: Common signs include the engine overheating, an intermittent or weak water stream from the "telltale" outlet, and finding brittle or cracked rubber blades during inspection.

Q: How often should I replace my water pump impeller?
A: For preventative maintenance, it is recommended to inspect the impeller annually and replace it every 1-2 years or every 100-200 hours of use, depending on operating conditions like saltwater or sandy water exposure.

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.