Impeller Repair Kit – Fits Oberdorfer 202M-11 & N202M Series Pumps (Replaces Onan 132-0277, Westerbeke 17556)

Impeller Repair Kit – Fits Oberdorfer 202M-11 & N202M Series Pumps

This comprehensive repair kit services a wide range of Oberdorfer pumps, including models 202M-11, N202M-03, N202M-7, N202M-11, N202M-15, and N202M-16, which are commonly found on various marine engines and generators.

It serves as a direct replacement for multiple OEM part numbers, including Onan 132-0277/132-0316, Westerbeke 17556, Universal 200209/295628, and Globe 815, ensuring a precise fit and restoring pump performance.

• Complete Kit: Includes the impeller, gasket, and O-ring needed for a full service.
• High-Performance Impeller: Features a durable 6-blade design made from neoprene.
• Installation Method: Designed as a direct replacement for the original components.

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.

Onan Generators

Oberdorfer Pump Applications

Technical Specifications

Package Contents

• 1 x Impeller (Replaces Oberdorfer 6593, Onan 132-0316)
• 1 x Gasket (Replaces Oberdorfer 6599, Onan 132-0315)
• 1 x O-ring (9797-034)

Installation Guide

1. Shut off the engine and close the raw water intake valve (seacock).
2. Loosen and remove the screws from the pump's faceplate.
3. Pry off the faceplate and remove the old gasket. Note the orientation of the impeller blades.
4. Using needle-nose pliers or an impeller puller, firmly grip the hub of the old impeller and pull it straight out.
5. Clean any debris or old gasket material from the pump housing and faceplate.
6. Apply a small amount of water-based lubricant or soap to the new impeller and inside the pump housing.
7. Insert the new impeller, bending the blades in the same direction as the old one.
8. Place the new gasket and O-ring into position on the pump body.
9. Reinstall the faceplate and tighten the screws in a star pattern to ensure an even seal.
10. Open the raw water seacock, start the engine, and immediately check for leaks and proper water flow from the exhaust.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my pump?

A: This kit is designed for Oberdorfer 202M-11 and N202M series pumps. To ensure compatibility, verify your pump model in the "Compatible Engine Models" section and cross-reference your existing part number with our table. Measuring your old impeller is also a reliable method; this one has a 51mm (2") diameter and 22mm (7/8") width.

Q: What are the signs of a worn or failing impeller?

A: The most common indications are engine overheating, a noticeable reduction in water flowing from the exhaust outlet, and, upon inspection, visible cracks, tears, or missing blades on the impeller itself.

Q: How often should I replace my engine's raw water impeller?

A: For preventative maintenance, it is recommended to inspect the impeller annually and replace it every one to two seasons of use. Frequency depends on the operating environment (sandy/silty water may require more frequent changes) and hours of operation.

Q: Is this an OEM part?

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.