Impeller Repair Kit – Fits Sherwood 10077K & Onan MDKBK Series (Replaces Onan 0132-0375, 0132-0498)

Impeller Repair Kit – Fits Sherwood 10077K & Onan MDKBK Series (Replaces Onan 0132-0375, 0132-0498)

This impeller kit is designed for use with Sherwood pumps and Cummins Onan marine generators fitted with 12-blade neoprene impellers and 1/2" keyed shafts.

It acts as a direct replacement for several OEM parts, making it suitable for a variety of marine applications.

• Includes: 1 impeller, 3 gaskets, and 1 O-ring
• Material: Neoprene with 12 blades
• Shaft Compatibility: Designed for 1/2" (12.7 mm) keyed shafts with 3/32" key drive

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 Cummins Onan owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

Technical Specifications

Package Contents

• 1 x Impeller (Sherwood 10077K, Onan 0132-0375)
• 3 x Gaskets
• 1 x O-Ring (Onan 132-0372)

Installation Guide

1. Shut off the engine and allow it to cool before starting installation.
2. Drain the cooling system to prevent water spillage when removing the old impeller.
3. Remove the pump cover and take out the old impeller carefully.
4. Inspect the pump housing for wear or damage before installing the new impeller.
5. Apply a light coating of lubricant to the new impeller blades for easier installation.
6. Insert the new impeller onto the 1/2" keyed shaft, ensuring proper alignment with the key.
7. Replace and secure the pump cover with new gaskets and O-ring included in the kit.
8. Refill the cooling system and check for leaks.
9. Test the engine to verify proper water pump operation and cooling system function.
10. Inspect for any abnormal noises or vibrations during operation.
11. Consult a professional if installation issues or performance concerns arise.
12. Regularly inspect and replace impeller based on engine manufacturer recommendations.

Troubleshooting & FAQ

• How do I confirm this fits my engine?
  Check your engine model and OEM part number against the compatibility tables provided. If unsure, consult your engine manual or contact support.
• What are the differences between this aftermarket kit and the OEM part?
  This is an aftermarket replacement built to OEM specifications with comparable materials but is not an original OEM part.
• How often should I replace the impeller?
  Impellers typically require replacement every 1-2 years depending on usage and water conditions; check your engine’s manual for specific intervals.
• What are common signs of impeller failure?
  Reduced water flow, overheating, or unusual noises from the pump can indicate a failing impeller that needs inspecting or replacement.
• 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.