Water Pump Impeller Kit – Fits Johnson/Evinrude 8-15 HP (Replaces 394711)

Water Pump Impeller Kit – Fits Johnson/Evinrude 8-15 HP (Replaces 394711)

This water pump impeller kit is designed for Johnson/Evinrude 8, 9.9, and 15 HP 2-Stroke outboard engines (1974 and newer) as well as 9.9 and 15 HP 4-Stroke outboard engines (1995 and newer). It is a complete rebuild kit for the engine's water pump assembly.

This part is a direct replacement for Johnson/Evinrude OEM part number 394711 / 0394711 and is cross-referenced with aftermarket parts including Sierra 18-3327, GLM 12050, and Mallory 9-48201.

• Includes a new housing, neoprene impeller, wear plate, and all required seals, gaskets, and bolts for a full service.
• Engineered to meet or exceed original equipment specifications for reliable cooling performance.
• Provides a direct-fit replacement for the listed models, ensuring a straightforward installation.

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 Pump Housing (435390)
• 1 x Pump Cup (324097)
• 1 x Neoprene Impeller (386084)
• 1 x Pin (300611)
• 1 x Seal (318972)
• 1 x Wear Plate (318995)
• 2 x O-Ring (202893/319085)
• 3 x Grommet (338908/302497/327035)
• 4 x Installation Bolt (302325)

Installation Guide

Professional installation is highly recommended. Always consult your owner's or service manual for detailed instructions and torque specifications. The general process is as follows:

1. Ensure the engine is off and the battery is disconnected.
2. Remove the gearcase/lower unit from the outboard engine.
3. Unscrew the bolts securing the water pump housing and remove the old assembly.
4. Thoroughly clean all mating surfaces, removing any old gasket residue or corrosion.
5. Install the new wear plate and gasket, followed by the new impeller (turn the driveshaft clockwise to set the fins).
6. Install the new housing, cup, and seals from the kit.
7. Tighten the housing bolts to the manufacturer’s specified torque.
8. Reinstall the lower unit, and test for proper water flow from the tell-tale outlet before operating the boat.

Troubleshooting & FAQ

Q: How do I confirm this part fits my engine?

A: The most reliable method is to match your engine's original part number to the numbers in our cross-reference list. Additionally, please review the compatible models table to ensure your specific engine HP, stroke, and year range are listed. Visually comparing our product photos to your old part can also help prevent errors.

Q: What are the signs of a bad water pump impeller?

A: Common symptoms include the engine overheating at idle or low speeds, a weak or non-existent water stream from the engine's tell-tale outlet, and in severe cases, a cracked or melted pump housing from excessive heat.

Q: How often should I replace the impeller?

A: For preventative maintenance, it is recommended to replace the impeller every 1 to 2 years, or every 100-200 hours of operation. If you frequently operate in sandy, silty, or saltwater, more frequent inspections and replacements are advisable.

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.