Flexible Impeller Kit – Fits Kohler Marine Generators (Replaces Kohler 359978, Sierra 23-3314)

Flexible Impeller Kit – Fits Kohler Marine Generators (Replaces Kohler 359978, Sierra 23-3314)

This flexible impeller kit is designed for Kohler marine generators, including the 4EF, 5E, 6EF, and 7.3E series models. It serves as a direct, reliable replacement for several OEM and aftermarket part numbers, ensuring proper cooling system function.

This kit is a direct substitute for Sherwood part number 8000/8000K, Kohler 359978, Sierra 23-3314, Onan 132-0415, and JMP 7013-01K.

• Installation Method: Direct replacement component.
• Primary Component: Includes a 6-blade neoprene impeller with a brass hub.
• Primary Application: Designed for engine sea water cooling pumps.

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.

Kohler Marine Generators

Sherwood Pump Applications

Cummins Onan Generators

Technical Specifications

Package Contents

• 1 x Flexible Impeller (Neoprene + Brass) with 6 Blades and D-slot key (Replaces Kohler 359978, Sherwood 8000K)
• 1 x O-Ring, Nitrile 70 (Replaces ORG0031)

Installation Guide

1. Shut off the engine and close the sea cock (water intake valve) to prevent water from entering the boat.
2. Locate and access the sea water pump housing.
3. Loosen and remove the screws holding the pump cover plate. Keep track of the screws.
4. Carefully remove the cover plate and the old O-ring. A small amount of water may spill out.
5. Use needle-nose pliers or an impeller puller to grip the hub of the old impeller and pull it straight out of the housing.
6. Clean the inside of the pump housing, ensuring it is free of debris and old impeller fragments.
7. Lightly lubricate the new O-ring and the interior of the pump housing with marine-safe grease or soapy water.
8. Squeeze the blades of the new impeller and insert it, making sure the D-slot aligns with the key on the pump shaft.
9. Re-install the cover plate with the new O-ring, tightening the screws evenly in a crisscross pattern to ensure a good seal.
10. Open the sea cock.
11. Start the engine and immediately check for steady water flow from the exhaust and inspect the pump for any leaks.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Kohler generator?
A: This kit is a direct replacement for Kohler part number 359978. It is confirmed to fit a wide range of Kohler models, including the 4EF, 5E, 6EF, and 7.3E series. Please check the "Compatible Engine Models" section and cross-reference your generator's model and original part number to ensure compatibility.

Q: What are the signs of a failing impeller?
A: The most common signs are engine overheating alarms, a noticeable reduction in water flow from the exhaust outlet, and, upon inspection, visible damage to the impeller such as cracked, stiff, or missing blades.

Q: How often should I replace my generator's water pump impeller?
A: For optimal reliability, it is recommended to inspect the impeller annually and replace it every 1-2 years, or after approximately 200 hours of use. Replacement frequency should be increased if operating in water with heavy sediment or sand.

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.