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 (Replaces Onan 132-0277, Westerbeke 17556) is backordered and will ship as soon as it is back in stock.
Worry-free returns
Worry-free returns
Shop with confidence. If you’re not completely satisfied, eligible items may be returned within the return window, provided they are unused and in original packaging.
If the return is due to our error or a defective item, we’ll make it right.
Please contact us before returning any item.
Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
Tracking information will be provided once your order ships.
Impeller Repair Kit – Fits Oberdorfer 202M-11 & N202M Series Pu...
Impeller Repair Kit – Fits Oberdorfer 202M-11 & N202M Series Pumps (Replaces Onan 132-0277, Westerbeke 17556) is backordered and will ship as soon as it is back in stock.
Product Details
This Impeller Repair Kit for Oberdorfer 202M-11 and N202M Series Pumps contains the components needed for routine raw-water pump service. It is intended for Oberdorfer 202M-11, N202M-03, N202M-7, N202M-11, N202M-15, and N202M-16 pump applications commonly used in marine engines and generators.
The kit provides replacement references for Onan 132-0277 and 132-0316, Westerbeke 17556, Universal 200209 and 295628, and Globe 815. Always compare the pump model, existing part number, shaft style, and impeller dimensions before ordering.
- Service application: Designed for listed Oberdorfer pump models and corresponding raw-water cooling systems.
- Impeller material: Neoprene for water and engine-coolant pumping applications.
- Service components: Includes one impeller, one gasket, and one O-ring for a standard pump service.
Part Number Matrix
Use the following references to compare the kit and its individual service components. Equivalent references may describe a complete kit or a component only.
| Brand | Part Number | Notes |
|---|---|---|
| Onan | 132-0277 | Kit reference |
| Onan | 132-0316 | Impeller reference |
| Onan | 132-0315 | Gasket reference |
| Westerbeke | 17556 | Kit reference |
| Universal | 200209 | Kit reference |
| Universal | 295628 | Kit reference |
| Globe | 815 | Kit reference |
| Oberdorfer | 6593 | Impeller reference |
| Oberdorfer | 6599 | Gasket reference |
Engine & Model Compatibility
Confirm the pump model or generator application before installation. The following Onan generator model references are associated with the corresponding service-pump application.
| Brand | Model | Rated KW | OEM Part No. |
|---|---|---|---|
| Onan | MDKC | 3.5–4.0 KW | 132-0277 |
| Onan | MDKD | 6.5–8.0 KW | 132-0277 |
This kit is intended for the following Oberdorfer pump models when the listed dimensions and shaft configuration match the original part.
| Brand | Model | Part Reference | Notes |
|---|---|---|---|
| Oberdorfer | 202M-11 | 6593 | Impeller reference |
| Oberdorfer | N202M-03 | 6593 | Impeller reference |
| Oberdorfer | N202M-7 | 6593 | Impeller reference |
| Oberdorfer | N202M-11 | 6593 | Impeller reference |
| Oberdorfer | N202M-15 | 6593 | Impeller reference |
| Oberdorfer | N202M-16 | 6593 | Impeller reference |
Technical Specs
- Product Type
- Impeller repair kit
- Installation
- Direct replacement for compatible pump applications
- Impeller Dimensions
- Width: 22 mm (7/8 in); diameter: 51 mm (2 in)
- Fitting Type
- 1/2 in D-shaft
- Impeller Material
- Neoprene
- Impeller Blade Count
- 6
What’s in the Box
- 1 × neoprene impeller, corresponding to Oberdorfer 6593 and Onan 132-0316 references
- 1 × gasket, corresponding to Oberdorfer 6599 and Onan 132-0315 references
- 1 × O-ring, reference 9797-034
Installation Notes
- Ensure the engine is switched off and cool. Close the raw-water seacock.
- Place an absorbent towel beneath the pump to catch spilled water or coolant.
- Loosen the screws and remove the pump cover plate.
- Note the direction of the existing impeller blades before removal.
- Use an impeller puller or two flat-head screwdrivers to remove the old impeller carefully. Avoid scratching the pump housing.
- Clean the pump housing, cover plate, and gasket surfaces. Remove old gasket material and debris.
- Install the new gasket and O-ring supplied with the kit in their appropriate locations.
- Lubricate the new impeller with a small amount of water-based lubricant or liquid soap, then install it with the blades bent in the correct direction.
- Reinstall the cover plate and tighten the screws evenly in a star pattern.
- Open the seacock, start the engine, and check the pump and cover plate immediately for leaks and proper water flow.
Troubleshooting & FAQ
How do I confirm this kit fits my pump?
Verify the pump model against the compatibility information, compare the old part number with the listed references, and confirm the impeller dimensions, blade count, and 1/2-inch D-shaft configuration. If any of these details differ, do not assume the kit will fit.
What are the signs of a failing impeller?
Common symptoms include overheating at idle or low speed, reduced water flow from the exhaust, visible cracks or missing blades, a stiff or swollen impeller, or an impeller that has taken a permanent set after extended service.
How often should I replace my impeller?
Inspect the impeller annually and replace it according to operating hours, service conditions, and the manufacturer’s maintenance recommendations. Sandy or silty water can accelerate wear, so more frequent inspection may be appropriate.
Can I reuse my old gasket or O-ring?
Reuse is not recommended. Seals can become compressed, brittle, or damaged during removal. Install the new gasket and O-ring supplied with this kit to help prevent leaks.
Is this impeller resistant to fuel or oil?
No. The neoprene impeller is intended for water and engine-coolant service, not for pumping fuel or oil. Petroleum products can cause neoprene to swell and deteriorate.
What is the difference between this kit and the OEM version?
This is an aftermarket replacement kit designed for the listed applications and reference numbers. It is not an original-equipment-manufacturer component. Confirm dimensions and application details before installation.
What if I buy the wrong part?
Returns are accepted for unused items in their original condition within the standard return period. To reduce fitment errors, verify the pump model, shaft style, dimensions, and reference numbers before ordering.
How fast do you ship?
Standard shipping typically takes 5–15 days, depending on destination and fulfillment location. Expedited options may be available at checkout for eligible regions.
What is the warranty on this part?
This product is covered by a 1-year warranty against manufacturing defects under normal use conditions. Contact customer support with your order information and a description of the issue if service is required.
Safety & Important Info
- Verify the pump model, dimensions, shaft configuration, and references against the original part before purchasing.
- Do not operate the engine with the raw-water seacock closed except as required for a controlled service procedure.
- This product is an aftermarket replacement part, not an original-equipment-manufacturer component.
- Professional installation is recommended when you are not familiar with marine raw-water pump service.
About Sea Sierra
- Pro-Grade Standards — We supply marine replacement parts selected for dependable fit and service performance.
- Fast Global Fulfillment — Warehouses worldwide help provide efficient delivery to most regions.
- Manufacturer-Direct Value — Direct sourcing helps provide competitive pricing while maintaining consistent product standards.
Payment & Security
Payment methods
Your payment information is processed securely. We do not store credit card details nor have access to your credit card information.
