389589 777129 Impeller for Evinrude Johnson OMC BRP 40HP 45HP 50HP 55HP 60HP | JLM Marine

389589 777129 Impeller for Evinrude Johnson OMC BRP 40HP 45HP 50HP 55HP 60HP

This high-performance neoprene impeller is engineered to fit Evinrude Johnson OMC BRP 2-stroke outboard motors from 40 HP to 60 HP (1979–1985 model years). Designed to replace OEM part numbers 389589 and 777129, it ensures reliable water pump operation and proper engine cooling.

A direct aftermarket replacement for Johnson/Evinrude/OMC/BRP impellers, this component also cross-references with Sierra 18-3062 and CEF 500318. Constructed from scientifically engineered neoprene rubber and corrosion-resistant metal alloy, it delivers dependable performance in harsh marine environments.

• 6-blade neoprene impeller designed for 2-stroke outboards
• Direct replacement for OEM part numbers 389589 / 777129
• Includes installation-ready impeller (approx. 60 g)

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 Serial Number Guide.

Technical Specifications

Package Contents

• 1 × Neoprene Outboard Impeller

Installation Guide

1. Disconnect the fuel line and remove the outboard motor cowling to access the lower unit.
2. Drain the lower unit gear oil and disconnect the water pump housing bolts.
3. Carefully remove the old impeller from the shaft, noting the blade rotation direction.
4. Inspect the impeller housing and shaft for wear, corrosion, or debris; clean thoroughly.
5. Lubricate the new impeller blades and housing with glycerin or soapy water (never petroleum-based grease).
6. Align the impeller key with the shaft keyway and slide the impeller onto the shaft, ensuring blades bend in the correct rotation direction.
7. Reinstall the impeller plate and water pump housing, ensuring all gaskets are properly seated.
8. Torque all bolts to manufacturer specifications in a cross-pattern to prevent warping.
9. Refill the lower unit with the recommended gear oil and check for leaks.
10. Reinstall the cowling, reconnect the fuel line, and perform a water test to verify proper flow and cooling.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my engine?
A: Check the Compatible Engine Models table above for your motor's HP, stroke, and year range. You can also cross-reference your original impeller's OEM part number (389589 or 777129) or measure the impeller diameter (69 mm) and shaft diameter (16 mm) to ensure a match.

Q: How often should I replace my impeller?
A: Most manufacturers recommend replacing your impeller annually or every 200–300 operating hours, whichever comes first. If you frequently operate in sandy or debris-filled water, inspect it more often and replace at the first sign of cracking, missing blades, or reduced water flow.

Q: What are the signs my impeller is failing?
A: Common symptoms include engine overheating, weak or no water stream from the tell-tale (pilot hole), steam from the cowling, or temperature warning alarms. Inspect the impeller immediately if you notice any of these issues to prevent serious engine damage.

Q: Can I use petroleum-based grease when installing this impeller?
A: No. Petroleum-based products will damage neoprene rubber and cause premature failure. Always use glycerin, soapy water, or a water-pump-specific lubricant during installation.

Q: Is this an OEM part or an aftermarket replacement?
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.