389642 777212 Water Pump Impeller for Evinrude Johnson V4 V6 V8 | JLM Marine

Water Pump Impeller – Fits Evinrude Johnson V4 V6 V8 Outboard Motors 85HP–235HP

This high-quality aftermarket water pump impeller is designed to fit Evinrude Johnson V4, V6, and V8 outboard motors ranging from 85HP to 235HP. Engineered to meet OEM specifications, this impeller ensures reliable cooling system performance for your outboard engine.

This impeller directly replaces OEM part numbers 389642, 777212, 0777212, and aftermarket equivalent Sierra 18-3043, providing a cost-effective solution for maintaining your engine's water pump system.

• Complete with impeller key/pin for secure installation
• Premium rubber construction for durability and longevity
• Direct replacement for Johnson/Evinrude/OMC/BRP water pump assemblies

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 × Outboard Rubber Impeller with Key/Pin

Installation Guide

1. Disconnect the fuel line and remove the lower unit from the outboard motor according to your engine's service manual.
2. Remove the water pump housing by unscrewing the mounting bolts. Take note of the orientation of the old impeller before removal.
3. Carefully extract the old impeller from the pump housing, noting the position of the key/pin in the drive shaft.
4. Clean the pump housing thoroughly, removing any debris, old gasket material, or corrosion.
5. Insert the key/pin into the drive shaft slot, ensuring it is seated properly.
6. Lubricate the new impeller blades with glycerin, soapy water, or water pump grease to ease installation and prevent damage.
7. Align the impeller blades in the correct rotational direction (typically counter-clockwise when viewed from above) and carefully slide the impeller onto the drive shaft.
8. Ensure the key/pin engages with the impeller slot correctly and that all blades are positioned inside the housing.
9. Reinstall the water pump housing and plate, torquing all bolts to manufacturer specifications.
10. Reattach the lower unit to the outboard motor, ensuring proper alignment and secure fastening.
11. Reconnect the fuel line and perform a water test to confirm proper water flow from the tell-tale outlet.
12. Monitor engine temperature during initial operation to verify the cooling system is functioning correctly.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my specific engine?
A: Cross-reference your engine's horsepower and year range with the compatibility table above. You can also verify by checking your original impeller's OEM part number (389642, 777212, or 0777212) stamped on the part or listed in your engine's service manual.

Q: How often should I replace my water pump impeller?
A: Most manufacturers recommend replacing the impeller every 2–3 years or 300–400 hours of operation, whichever comes first. If you frequently operate in sandy or debris-filled water, or if the engine has overheated, inspect and replace the impeller more frequently.

Q: What are the signs that my impeller is failing?
A: Common symptoms include reduced or no water discharge from the tell-tale outlet, engine overheating, steam from the engine, or a high-temperature warning alarm. Inspect the impeller immediately if you notice any of these signs.

Q: Can I install this impeller myself or do I need a mechanic?
A: If you have basic mechanical skills and the appropriate tools, you can replace the impeller yourself following the installation guide. However, if you're unfamiliar with outboard motor servicing, professional installation is recommended to avoid damage to the water pump or engine.

Q: Will this aftermarket impeller perform as well as the original OEM part?
A: Yes, this aftermarket impeller is manufactured to OEM specifications using comparable-grade rubber materials. It is designed to provide reliable performance and durability equivalent to the original factory part at a more competitive price point.

Q: Is this an OEM or aftermarket part?
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.