Water Pump Impeller for Honda Marine 75–130 HP and Tohatsu BFT115A/BFT150A Outboards
Water Pump Impeller for Honda Marine 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
Delivery and Shipping
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Water Pump Impeller for Honda Marine 75–130 HP and Tohatsu BFT115A/...
Water Pump Impeller for Honda Marine 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 water pump impeller is listed for selected Honda Marine 4-stroke outboards rated at 75, 90, 115, and 130 HP, as well as Tohatsu BFT115A and BFT150A 4-stroke outboards. It is intended to replace a worn impeller and help maintain proper water circulation through the engine cooling system.
The documented Honda reference numbers are 19210-ZW1-B02, 19210-ZW1-B03, and 19210-ZW1-B04. The documented Tohatsu reference number is HZW1-19210-B04. Additional aftermarket reference numbers listed for the Honda application include Sierra Marine 18-3250 and Mallory Marine 9-45104.
- Aftermarket replacement water pump impeller.
- Single impeller product; this listing is not a complete water pump rebuild kit.
- For the specific engine applications and reference numbers listed below.
- Verify the engine model, horsepower, stroke, and existing impeller reference before ordering.
Part Number Matrix
Use the following references to compare the impeller with your original part and application information.
| Brand or Reference Type | Part Number |
|---|---|
| Honda | 19210-ZW1-B02 |
| Honda | 19210-ZW1-B03 |
| Honda | 19210-ZW1-B04 |
| Tohatsu | HZW1-19210-B04 |
| Sierra Marine aftermarket reference | 18-3250 |
| Mallory Marine aftermarket reference | 9-45104 |
Engine & Model Compatibility
Compatibility is limited to the applications explicitly listed by the product records. The Honda and Tohatsu applications are shown separately because they use different model and reference-number descriptions.
| Brand | Model or Application | Rated HP | Stroke | Documented Reference | Application Notes |
|---|---|---|---|---|---|
| Honda Marine | Selected Honda Marine outboards | 75, 90, 115, 130 | 4-Stroke | 19210-ZW1-B02 / 19210-ZW1-B03 / 19210-ZW1-B04 | Confirm the exact engine model and serial-number range before installation. |
| Tohatsu | BFT115A | 115 | 4-Stroke | HZW1-19210-B04 | Confirm the exact model and serial-number range before installation. |
| Tohatsu | BFT150A | 150 | 4-Stroke | HZW1-19210-B04 | Confirm the exact model and serial-number range before installation. |
Technical Specs
- Product Type
- Water pump impeller
- Product Configuration
- Single impeller
- Part Type
- Aftermarket replacement component
- Honda Applications
- Selected 4-stroke outboards rated at 75, 90, 115, and 130 HP
- Tohatsu Applications
- BFT115A and BFT150A 4-stroke outboards
- Honda Reference Numbers
- 19210-ZW1-B02, 19210-ZW1-B03, and 19210-ZW1-B04
- Tohatsu Reference Number
- HZW1-19210-B04
What’s in the Box
- 1 x Water pump impeller
Gaskets, seals, housing components, wear plates, and other water pump parts are not included unless specifically stated in the order details.
Installation Notes
- Confirm the engine model, horsepower, stroke, and original impeller reference before beginning work.
- Turn the engine off, allow it to cool, and follow the manufacturer’s safety procedures.
- Remove the lower unit and water pump cover according to the engine service instructions.
- Inspect the pump housing, wear plate, key, seals, and gaskets for wear or damage. Replace damaged parts separately.
- Remove the old impeller and note the direction of the blades before removal.
- Clean the pump housing and drive-shaft area. Use an appropriate water-based lubricant or glycerin during installation.
- Install the new impeller with the drive key correctly positioned and orient the blades as required by the engine manufacturer.
- Reinstall the pump cover and lower unit using the manufacturer’s specified procedures and tightening sequence.
- Run the engine only with an adequate water supply and check for a steady cooling-water tell-tale stream.
Troubleshooting & FAQ
Which engines does this impeller fit?
The company application records list selected Honda Marine 4-stroke outboards rated at 75, 90, 115, and 130 HP, plus Tohatsu BFT115A and BFT150A 4-stroke outboards. Always compare the exact engine model, serial-number range, and original impeller reference before ordering.
Is this a complete water pump rebuild kit?
No. This listing is for one water pump impeller only. The housing, wear plate, gaskets, seals, and other water pump components are not included unless separately specified.
What are common signs of a worn impeller?
Possible signs include a weak or missing tell-tale stream, overheating warnings, reduced cooling-water flow, cracked or brittle blades, or a damaged hub. Inspect the complete water pump assembly when replacing the impeller.
How often should the impeller be replaced?
Replacement timing depends on the engine manufacturer’s maintenance schedule and operating conditions. Inspect the impeller regularly and replace it sooner if the engine is used in sandy, silty, salty, or debris-filled water.
Is this an OEM part?
No. This is an aftermarket replacement impeller. Honda, Tohatsu, Sierra Marine, and Mallory names and part numbers are used only to identify documented applications or reference numbers.
Safety & Important Info
- Confirm the complete engine model, horsepower, stroke, serial-number range, and original part number before purchase.
- Do not operate an outboard without an adequate water supply.
- Do not use the engine if the cooling-water tell-tale stream is weak or absent.
- Professional installation is recommended when removing the lower unit or servicing the water pump.
About Sea Sierra
- Marine Replacement Parts — Practical aftermarket components for common outboard maintenance applications.
- Application-Focused Listings — Reference numbers and engine applications are provided to support part matching.
- Customer Support — Contact support with your exact engine model and reference number if you need help confirming the application.
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