4-Stroke Water Pump Impeller with Key – Fits Honda 75–130 HP and Tohatsu BFT115A/BFT150A Outboards
4-Stroke Water Pump Impeller with Key – Fits Honda 75–130 HP and Tohatsu BFT115A/BFT150A Outboards is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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4-Stroke Water Pump Impeller with Key – Fits Honda 75–130 HP and To...
4-Stroke Water Pump Impeller with Key – Fits Honda 75–130 HP and Tohatsu BFT115A/BFT150A Outboards is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket 4-stroke water pump impeller with key is intended for selected Honda Marine outboards rated at 75, 90, 115, and 130 HP. It is also listed for Nissan/Tohatsu marine outboards including the 4-stroke BFT115A and BFT150A. The included key is supplied with the impeller for the water-pump installation.
Use your engine brand, model designation, horsepower, and existing impeller dimensions to confirm compatibility before ordering. Engine model and serial-number conditions can vary, so do not rely on horsepower alone.
- Replacement water pump impeller for selected 4-stroke outboards.
- Includes one matching drive key.
- Aftermarket replacement for the listed OEM and aftermarket reference numbers.
- Designed to restore water-pump circulation when the original impeller is worn or damaged.
Part Number References
The following numbers are listed as reference or interchange numbers for this replacement impeller. They are not included as additional parts.
| Brand | Reference Number | Reference Type |
|---|---|---|
| Honda | 19210-ZW1-B02 | OEM reference |
| Honda | 19210-ZW1-B03 | OEM reference |
| Honda | 19210-ZW1-B04 | OEM reference |
| Sierra Marine | 18-3250 | Aftermarket reference |
| Mallory Marine | 9-45104 | Aftermarket reference |
| Tohatsu | HZW1-19210-B04 | OEM-style reference |
Engine Compatibility
Company fitment information identifies the following applications. Always verify the complete model and serial-number information on your engine before installation.
| Brand | Model or Application | Rated HP | Stroke | Reference Number | Notes |
|---|---|---|---|---|---|
| Honda Marine | Selected 75 HP outboards | 75 | 4-Stroke | 19210-ZW1-B02 / B03 / B04 | Verify the exact model and serial number. |
| Honda Marine | Selected 90 HP outboards | 90 | 4-Stroke | 19210-ZW1-B02 / B03 / B04 | Verify the exact model and serial number. |
| Honda Marine | Selected 115 HP outboards | 115 | 4-Stroke | 19210-ZW1-B02 / B03 / B04 | Verify the exact model and serial number. |
| Honda Marine | Selected 130 HP outboards | 130 | 4-Stroke | 19210-ZW1-B02 / B03 / B04 | Verify the exact model and serial number. |
| Nissan / Tohatsu | BFT115A | 115 | 4-Stroke | HZW1-19210-B04 | Confirm the complete model designation before purchase. |
| Nissan / Tohatsu | BFT150A | 150 | 4-Stroke | HZW1-19210-B04 | Confirm the complete model designation before purchase. |
Technical Specifications
- Product Type
- 4-stroke water pump impeller with drive key
- Application
- Selected Honda, Nissan, and Tohatsu marine outboards
- Installation
- Replacement component for the water-pump assembly
- Included Drive Key
- Yes
- Product Condition
- Aftermarket replacement
What's in the Box
- 1 x Water pump impeller
- 1 x Matching drive key
The water-pump housing, wear plate, gaskets, seals, fasteners, and other service parts are not included unless specifically listed above.
Installation Notes
- Review the applicable outboard service manual and disconnect the battery before beginning work.
- Place the engine in neutral and remove the lower unit according to the manufacturer's procedure.
- Remove the water-pump housing and carefully note the position of the original impeller and drive key.
- Remove the old impeller and inspect the housing, wear surfaces, seals, and keyway for damage or abnormal wear.
- Clean the pump cavity and confirm that the supplied key is properly seated on the shaft.
- Install the impeller with the blades oriented in the direction required by the engine manufacturer's service procedure.
- Reassemble the water-pump housing using any required new gaskets or seals; these service parts are not included with this listing.
- Reinstall the lower unit and tighten all fasteners to the manufacturer's specified torque.
- Run the engine only with an appropriate water supply and confirm normal cooling-water discharge before returning the boat to service.
Troubleshooting & FAQ
How do I confirm that this impeller fits my engine?
Check the engine manufacturer's nameplate for the brand, exact model, horsepower, stroke, and serial information. Compare those details with the compatibility table and verify the reference number and physical dimensions against the impeller being replaced. If any information differs, consult the engine parts diagram or a qualified marine technician.
What are common signs of a worn water-pump impeller?
Possible signs include reduced or intermittent tell-tale flow, overheating, poor water circulation at idle, or cracked, brittle, deformed, or missing impeller blades.
Does this listing include the drive key?
Yes. The company product description identifies this item as a water pump impeller with key. One impeller and one matching drive key are included.
Does it include the water-pump housing or gaskets?
No. This listing includes the impeller and drive key only. The housing, wear plate, gaskets, seals, and other water-pump service parts are not included.
How often should the impeller be replaced?
Replace the impeller according to the engine manufacturer's maintenance schedule, or sooner if inspection shows wear or if cooling-water flow is reduced. Replacement frequency depends on operating hours, water conditions, and maintenance practice.
Is this an OEM part?
No. This is an aftermarket replacement. Honda, Sierra Marine, Mallory Marine, and Tohatsu reference numbers are provided only to help identify the intended application.
Safety & Important Information
- Confirm the complete engine model and serial-number application before ordering.
- Compare the replacement impeller and key with the original parts before installation.
- Do not operate an outboard without an adequate water supply.
- Use the applicable service manual for torque values, assembly procedures, and maintenance requirements.
- Professional installation is recommended when lower-unit or water-pump service is unfamiliar.
About Sea Sierra
- Marine Replacement Parts — Practical aftermarket components for routine outboard maintenance and repair.
- Application-Focused Listings — Reference numbers and fitment information are provided to help with part identification.
- Service Support — Verify your engine information and consult the applicable service documentation before installation.
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