Water Pump Impeller for Honda BF8D and BF9.9D Outboards – Short & Long Shaft, Replaces 19210-ZW9-013, 19210-ZW9-003, Sierra 18-3100
Water Pump Impeller for Honda BF8D and BF9.9D Outboards – Short & Long Shaft, Replaces 19210-ZW9-013, 19210-ZW9-003, Sierra 18-3100 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Water Pump Impeller for Honda BF8D and BF9.9D Outboards – Short &am...
Water Pump Impeller for Honda BF8D and BF9.9D Outboards – Short & Long Shaft, Replaces 19210-ZW9-013, 19210-ZW9-003, Sierra 18-3100 is backordered and will ship as soon as it is back in stock.
Product Details
This water pump impeller for Honda Marine outboards is a direct-replacement cooling-system component for Honda BF8D and BF9.9D 4-stroke outboard models with either short or long shafts. It is designed to restore proper water-pump circulation and help maintain dependable engine cooling during operation.
The impeller replaces Honda part numbers 19210-ZW9-013 and 19210-ZW9-003. It is also cross-referenced with Sierra Marine 18-3100.
- For Honda BF8D and BF9.9D outboards.
- Compatible with short- and long-shaft configurations as specified for the applicable model.
- Aftermarket replacement water-pump impeller.
- Six-blade rubber impeller for routine cooling-system service.
Part Number Matrix
Use the following references to compare the replacement impeller with the part number shown on your original component or service information.
| Brand | Part Number | Reference |
|---|---|---|
| Honda | 19210-ZW9-013 | Primary OEM reference |
| Honda | 19210-ZW9-003 | Additional OEM reference |
| Sierra Marine | 18-3100 | Aftermarket cross-reference |
| CEF | 500347 | Catalog cross-reference |
Engine & Model Compatibility
Confirm the complete engine model and shaft configuration before ordering. The company fitment record specifies Honda BF8D and BF9.9D models with short or long shafts.
| Brand | Model | Rated HP | Stroke | Shaft | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Honda Marine | BF8D | 8 HP | 4-Stroke | Short or long | 19210-ZW9-013 19210-ZW9-003 |
Confirm the exact model designation and shaft configuration. |
| Honda Marine | BF9.9D | 9.9 HP | 4-Stroke | Short or long | 19210-ZW9-013 19210-ZW9-003 |
Confirm the exact model designation and shaft configuration. |
Fitment note: Do not use the broader 8–20 HP range as a fitment assumption. This listing is specifically documented for BF8D and BF9.9D models; other Honda models require separate confirmation of the impeller part number and water-pump configuration.
Technical Specs
- Product Type
- Water pump impeller
- Application
- Honda Marine 4-stroke outboards
- Installation
- Direct replacement
- Shaft Configuration
- Short shaft or long shaft, subject to the specified BF8D/BF9.9D model
- Material
- Rubber
- Color
- Black
- Blade Count
- 6 blades
- External Diameter
- 45.6 mm
- Internal Diameter
- 13 mm
- Height
- 14.8 mm
- Drive Type
- Direct drive
What’s in the Box
- 1 x aftermarket water pump impeller
This is a single impeller, not a complete water-pump service kit. Gaskets, O-rings, keys, seals, housing components and other installation parts are not included unless separately stated.
Installation Notes
- Stop the engine, disconnect the battery where applicable, and place the outboard in neutral.
- Remove the lower unit according to the service procedure for your specific Honda outboard.
- Remove the water-pump housing and take out the existing impeller.
- Inspect the pump housing, wear plate, drive key, shaft and sealing surfaces for wear or damage.
- Clean the pump cavity and remove any fragments from the failed impeller.
- Install the replacement impeller on the driveshaft with the correct drive-key engagement.
- Position the impeller blades in the correct direction while reinstalling the pump housing. Follow the engine manufacturer’s service instructions for shaft rotation and blade orientation.
- Reinstall the pump housing and any removed seals or gaskets. Replace worn service parts as needed and tighten fasteners to the applicable service specification.
- Reattach the lower unit and test the cooling-water flow in a suitable water source before normal use.
Troubleshooting & FAQ
How do I confirm this impeller fits my Honda engine?
Confirm that your outboard is a Honda BF8D or BF9.9D 4-stroke model and identify whether it uses a short or long shaft. Also compare the existing impeller or service information with Honda part number 19210-ZW9-013 or 19210-ZW9-003. Other Honda models should not be assumed compatible solely because the horsepower is similar.
What are the signs of a failing water-pump impeller?
Typical signs include overheating, reduced or intermittent tell-tale water flow, poor cooling-water circulation, damaged or missing impeller blades, and rubber fragments inside the pump housing.
When should a water-pump impeller be replaced?
Replace the impeller according to the maintenance schedule for your engine and inspect it regularly. Replacement may be needed sooner after extended storage, heavy use, saltwater operation, or running the engine without an adequate water supply.
What is the difference between 19210-ZW9-013 and 19210-ZW9-003?
Both numbers are listed as OEM references for this replacement impeller. Compare the number on your original part and confirm the complete BF8D or BF9.9D model and shaft configuration before ordering.
Does this product include a key, gasket or O-ring?
No. This listing is for one replacement impeller only. The Sierra service-kit catalog lists related keys, gaskets and O-rings as separate service-kit components; they are not included with this single impeller listing.
Is this an OEM or aftermarket part?
This listing is for an aftermarket replacement impeller. Honda and Sierra part numbers are provided as application and cross-reference information; the product is not represented as a genuine Honda OEM component.
Safety & Important Information
- Verify the complete engine model, stroke, shaft configuration and original impeller part number before ordering.
- Do not operate an outboard without an adequate water supply or with a damaged cooling-system component.
- Replace damaged gaskets, O-rings, keys or other service parts as required during installation.
- Professional installation is recommended if you are not familiar with outboard lower-unit or water-pump service.
About Sea Sierra
- Marine Replacement Parts — We supply replacement components for routine outboard maintenance and repair.
- Application-Focused Listings — Product references and fitment information are provided to help you compare the part with your engine and original component.
- Service Support — For the best fitment result, use the complete engine model and existing part number when ordering.
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