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 (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

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.