387361 763735 Water Pump Impeller for Evinrude Johnson 1.2HP 2HP 4HP 6HP | JLM Marine

Water Pump Impeller for Evinrude Johnson 1.2HP 2HP 4HP 6HP

This high-performance water pump impeller is designed for Evinrude Johnson outboard motors rated 1.2HP, 2HP, 4HP, and 6HP. Engineered with marine-grade materials, it ensures reliable cooling system operation and is built to withstand harsh marine environments.

This impeller directly replaces OEM part numbers 387361, 0387361, 763735, and 0763735, as well as aftermarket equivalents including Sierra 18-3090 and CEF 500358. It provides a cost-effective solution for maintaining your outboard's water pump system.

• Constructed from high-performance neoprene rubber for superior durability
• Includes key/pin for proper installation
• Engineered for top performance in small horsepower Evinrude Johnson outboards

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 engine cowling to access the lower unit. Ensure the engine is completely cooled before beginning work.
2. Drain the lower unit gear oil and remove the propeller for safe access to the water pump housing.
3. Unbolt and remove the lower unit from the midsection by loosening the mounting bolts. Carefully separate the unit to expose the water pump.
4. Remove the old impeller by disassembling the water pump housing. Note the direction of the impeller blades for proper installation.
5. Clean the pump housing thoroughly to remove debris, old gasket material, and corrosion.
6. Lubricate the new impeller with marine-grade grease or soapy water to ease installation and prevent blade damage.
7. Install the new impeller into the housing with blades oriented in the correct direction. Insert the key/pin into the designated slot.
8. Reassemble the water pump housing with new gaskets, ensuring all components align properly.
9. Reattach the lower unit to the midsection, tightening all bolts to manufacturer specifications.
10. Refill the lower unit with fresh gear oil and reinstall the propeller securely.
11. Reconnect the fuel line and replace the engine cowling.
12. Test the cooling system by running the engine in a test tank or on-water, confirming strong water flow from the telltale outlet.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Evinrude Johnson outboard?
A: Verify that your engine is rated 1.2HP, 2HP, 4HP, or 6HP and that your original impeller matches OEM part numbers 387361 or 763735. Cross-reference with the compatibility table above or consult your engine's parts diagram.

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, weak water flow from the telltale, or visible blade damage, replace it immediately.

Q: What are the signs that my impeller is failing?
A: Common symptoms include engine overheating, reduced or no water discharge from the cooling telltale, steam from the engine, or visible cracks and missing blades on the impeller. Replace the impeller at the first sign of these issues.

Q: Can I install this impeller myself, or do I need a professional?
A: If you have mechanical experience and the proper tools, you can install it yourself following the steps in the Installation Guide. However, professional installation is recommended to ensure proper alignment and avoid damaging the impeller or housing.

Q: Does this impeller come with the key or pin needed for installation?
A: Yes, this package includes the impeller with the key/pin required for proper installation on your Evinrude Johnson outboard.

Q: Is this an OEM impeller 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.