Water Pump Impeller Kit – Fits Sherwood Pumps (Replaces 17000K, Jabsco 18958-0001, Johnson 09-704BT-1)

Water Pump Impeller Kit – Fits Sherwood Pumps (Replaces 17000K, Jabsco 18958-0001, Johnson 09-704BT-1)

This OEM-equivalent impeller kit is designed for marine water pump applications in various engine cooling systems. It provides a reliable replacement for Sherwood 17000K impellers and is compatible with pumps from several leading manufacturers, including Jabsco, Johnson, Caterpillar, and Cummins.

This component is a direct replacement for the following part numbers: Sherwood 17000K, Jabsco 18958-0001, Johnson 09-704BT-1, John Deere RE49896, Caterpillar 7E0321 / 1W5664, and Cummins 3802444 / 3897337 / 3916852 / 3925236.

• Engineered as a direct OEM-equivalent fit for straightforward installation.
• Constructed from a durable neoprene compound with a brass insert for longevity.
• Kit includes the flexible impeller and necessary seals for a complete service.

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.

Caterpillar Engines

Compatible Sherwood Pumps

Technical Specifications

Package Contents

• 1 × Flexible Impeller (17000K)
• 1 × O-Ring/Gasket (varies by brand)
• 1 × Key (if applicable, based on brand)

Installation Guide

1. Shut off the engine, allow it to cool completely, and disconnect the battery.
2. Close the engine's water inlet valve (seacock) to prevent water intrusion.
3. Locate the sea water pump and remove the screws from the cover plate.
4. Carefully remove the old impeller using impeller pullers or needle-nose pliers.
5. Clean the pump housing interior, checking for debris or old impeller fragments.
6. Lightly lubricate the new impeller with a water-based lubricant (e.g., glycerin).
7. Install the new impeller with a twisting motion, ensuring the vanes bend in the direction of pump rotation.
8. Install the new O-ring or gasket on the cover plate.
9. Re-secure the cover plate, tightening the screws evenly in a star pattern.
10. Open the water inlet valve (seacock) and reconnect the battery.
11. Start the engine and immediately check for proper water flow at the exhaust outlet.
12. Inspect the pump cover for any signs of leaks and tighten if necessary.

Troubleshooting & FAQ

How do I confirm this impeller fits my Caterpillar engine?
This impeller fits Caterpillar 3116, 3126, 3126B, 3208, C7, and C9 engines that use pump part number 7E0321 or 1W5664. Always verify your specific pump model and cross-reference the part number before ordering.

How often should I replace my water pump impeller?
We recommend inspecting the impeller annually and replacing it every 1-2 years as part of routine maintenance. Replacement frequency may increase depending on operating hours and water conditions (e.g., sandy or silty water).

What are the signs of a failing impeller?
Common symptoms include engine overheating at idle or low speeds, a noticeable reduction in water flow from the exhaust, and visible cracks, tears, or stiffness in the impeller vanes upon inspection.

OEM vs. Aftermarket?
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.

How fast do you ship and how much does it cost?
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.

What is your warranty and return policy?
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.