Water Pump Impeller – Fits Johnson/Evinrude/OMC 20-35 HP Outboards (Replaces 388702, 395265)

Water Pump Impeller – Fits Johnson/Evinrude/OMC 20-35 HP Outboards

This water pump impeller is designed for a direct fit on a wide range of Johnson, Evinrude, OMC, and Mercury outboard motors. It ensures proper engine cooling by replacing worn or damaged original impellers.

This component directly replaces Johnson/Evinrude part numbers 388702, 395265, and 395289; Mercury part numbers 47-89982 and 47-65958; Sierra 18-3052; and CEF 500357.

• Installation Type: Direct OEM replacement
• Material: Durable rubber with a brass hub for corrosion resistance in raw water applications
• Blades: 6

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.

For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Johnson/Evinrude/OMC

Mercury

Technical Specifications

Package Contents

• 1 x Water Pump Impeller (Replaces 388702/395265/395289)

Installation Guide

1. Disconnect Battery: Disconnect the negative battery cable to prevent accidental starting.
2. Access Lower Unit: Remove the bolts securing the lower unit (gearcase) to the engine's upper housing.
3. Remove Lower Unit: Carefully lower the gearcase away from the engine. The driveshaft will disengage from the powerhead.
4. Open Water Pump Housing: Locate the water pump on top of the gearcase and remove the bolts securing its cover.
5. Remove Old Impeller: Note the rotational direction of the old impeller fins. Remove the old impeller and the drive key.
6. Clean and Inspect: Clean the inside of the housing and inspect it for scoring or damage. Replace the housing if necessary.
7. Install New Impeller: Insert the new drive key and slide the new impeller onto the driveshaft, twisting it in the direction of engine rotation to seat the blades correctly.
8. Reassemble Housing: Apply a light coat of marine grease to the inside of the housing and reinstall the cover with a new gasket.
9. Reattach Lower Unit: Guide the driveshaft back into the powerhead and secure the lower unit with its bolts.
10. Reconnect Battery: Reconnect the negative battery cable.
11. Test Operation: Start the engine in the water or with a proper flush attachment to verify water is pumping from the tell-tale outlet.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my engine?
A: The best method is to compare your original part number to our cross-reference list. You can also check your engine model, HP, and year against the compatibility charts provided above. Use our serial number guides to verify your engine details.

Q: What are the signs of a failing water pump impeller?
A: Common signs include the engine overheating at idle or low speeds, a weak or non-existent water stream from the "tell-tale" outlet, and a dry, cracked, or brittle appearance on the old impeller's blades upon 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, depending on usage (hours) and water conditions (saltwater vs. freshwater). Frequent use in sandy or silty water may require more frequent replacement.

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.