387361 763735 Water Pump Impeller for Evinrude Johnson 2HP 4HP 6HP | JLM Marine

Water Pump Impeller – Fits Johnson Evinrude 1.2HP 2HP 4HP 6HP Outboard Motors

This high-performance water pump impeller is designed as a direct replacement for Johnson and Evinrude outboard motors ranging from 1.2HP to 6HP. Engineered to OEM specifications, it ensures reliable cooling system operation and optimal engine performance across multiple horsepower ratings.

This impeller directly replaces OEM part numbers 387361, 0387361, 763735, and 0763735, as well as aftermarket equivalents including Sierra 18-3090 and CEF 500358.

• Constructed from marine-grade neoprene rubber and corrosion-resistant metal alloy for maximum durability
• Engineered for top performance in demanding marine environments
• Direct fit for Johnson/Evinrude 2HP, 4HP, and 6HP outboard engines

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 Impeller

Installation Guide

1. Disconnect the fuel line and remove the spark plug wire to prevent accidental engine start. Position the outboard motor in an upright, stable position.
2. Remove the lower unit from the outboard motor by loosening the mounting bolts. Carefully slide the lower unit downward and away from the driveshaft.
3. Access the water pump housing by removing the retaining bolts. Note the orientation of the old impeller before removal.
4. Remove the old impeller by carefully pulling it off the shaft. Inspect the pump housing and plate for wear, corrosion, or damage.
5. Clean the pump housing thoroughly and apply marine-grade grease to the new impeller blades and the housing interior.
6. Install the new impeller onto the shaft, ensuring the blades curve in the correct rotation direction. Rotate the impeller gently to seat it properly.
7. Reassemble the water pump housing with a new gasket if provided, and tighten bolts to manufacturer specifications.
8. Reinstall the lower unit onto the motor, aligning the driveshaft carefully. Secure all mounting bolts evenly.
9. Reconnect the spark plug wire and fuel line. Test the engine in water to confirm proper water flow from the cooling system indicator.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Johnson/Evinrude engine?
A: Cross-reference your original part number (387361, 0387361, 763735, or 0763735) with the Part Number Cross-Reference table above. This impeller fits Johnson/Evinrude outboards rated at 1.2HP, 2HP, 4HP, and 6HP.

Q: How often should I replace my water pump impeller?
A: Most manufacturers recommend replacing the impeller every 2–3 years or 200–300 hours of operation, whichever comes first. If you notice overheating, reduced water flow, or visible blade damage, replace it immediately.

Q: What are the signs that my impeller is failing?
A: Common symptoms include engine overheating, weak or no water discharge from the cooling indicator, steam from the engine, or unusual noise from the lower unit. Inspect the impeller annually even if no symptoms are present.

Q: What materials is this impeller made from and how does it compare to OEM?
A: This impeller is constructed from marine-grade neoprene rubber and corrosion-resistant metal alloy, engineered to match OEM specifications. It provides comparable durability and performance to the original Johnson/Evinrude impeller.

Q: Can I install this impeller myself or do I need a professional?
A: If you have mechanical experience and the proper tools, installation is straightforward following the guide above. However, if you're unfamiliar with lower unit disassembly, professional installation is recommended to avoid damage.

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.