Impeller Drive Sleeve 359448 – Fits Kohler Marine 4EF, 4EFCD, 5E, 5ECD, 6EF, 6EFCD, 7.3E, 7.3ECD Generators

Impeller Drive Sleeve 359448 – Fits Kohler Marine 4EF, 4EFCD, 5E, 5ECD, 6EF, 6EFCD, 7.3E, 7.3ECD Generators

This impeller drive sleeve is a direct replacement for Kohler 359448, designed for use in the seawater/raw water cooling pump system of various Kohler marine generators. It fits models including the 4EF, 4EFCD, 5E, 5ECD, 6EF, 6EFCD, 7.3E, and 7.3ECD series.

Engineered to protect the coupling from wear during operation, this sleeve ensures a secure connection, preventing slippage and maintaining efficient cooling performance. It serves as a direct replacement for Kohler part numbers 359448, 359448-01, GM46773, 229955, and 359978.

• Function: Provides protection for the raw water pump coupling, reducing wear during operation.
• Material: Made from high-strength yellow polyurethane for durability.
• Design: Features an 8-spline internal gear design that fits tightly with the coupling to prevent slipping.

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.

Technical Specifications

Package Contents

• 1 x Drive Sleeve (359448)

Installation Guide

1. Safety First: Shut down the generator and disconnect all power sources.
2. Stop Water Flow: Close the corresponding seacock to prevent water from entering the system.
3. Access the Pump: Locate the raw water pump assembly on your Kohler generator.
4. Remove Cover: Carefully remove the pump cover plate and gasket to expose the impeller.
5. Extract Old Parts: Remove the impeller and then pull out the old, worn drive sleeve from the housing.
6. Clean Housing: Thoroughly clean the inside of the pump housing, removing any debris or old lubricant.
7. Install New Sleeve: Insert the new 359448 Drive Sleeve, ensuring its internal splines align correctly with the pump shaft coupling.
8. Reassemble Pump: Re-install the impeller, apply a new gasket with sealant if necessary, and secure the cover plate.
9. Test for Leaks: Open the seacock, start the generator, and immediately check the pump for any leaks and confirm proper water flow.

Troubleshooting & FAQ

Q: How do I confirm this drive sleeve will fit my Kohler generator?

A: This part is compatible with specific Kohler marine generator models, including the 4EF, 5E, 6EF, 7.3E series and their low-CO "CD" variants. Please cross-reference your generator model and original part number with the "Compatible Engine Models" and "Part Number Cross-Reference" tables above to ensure an exact match.

Q: What are the signs of a failing impeller drive sleeve?

A: A worn or failed drive sleeve can cause the impeller to slip or stop spinning, leading to reduced water flow, engine overheating alarms, or a complete loss of cooling. During impeller inspection, check the sleeve for stripped splines, cracks, or excessive play.

Q: How does this aftermarket part compare to the OEM original?

A: This drive sleeve is manufactured from high-quality polyurethane and is designed to meet or exceed original OEM specifications for fit, durability, and performance. It provides a reliable and cost-effective alternative to the original component.

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.