Water Pump Impeller for Honda BF80A, BF80AK1, BFT80AK1, BF90DK4, BF90DK5, BFT100AK1, BF100A and BF100AK1 – Replaces 19210-ZY9-H01
Water Pump Impeller for Honda BF80A, BF80AK1, BFT80AK1, BF90DK4, BF90DK5, BFT100AK1, BF100A and BF100AK1 – Replaces 19210-ZY9-H01 is backordered and will ship as soon as it is back in stock.
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Water Pump Impeller for Honda BF80A, BF80AK1, BFT80AK1, BF90DK4, BF...
Water Pump Impeller for Honda BF80A, BF80AK1, BFT80AK1, BF90DK4, BF90DK5, BFT100AK1, BF100A and BF100AK1 – Replaces 19210-ZY9-H01 is backordered and will ship as soon as it is back in stock.
Product Details
This water pump impeller is a replacement cooling-system component for selected Honda Marine four-stroke outboards. It is listed for Honda BF80A, BF80AK1, BFT80AK1, BF90DK4, BF90DK5, BFT100AK1, BF100A, and BF100AK1 models that use Honda OEM part number 19210-ZY9-H01.
The impeller circulates cooling water through the outboard water pump. Replace a worn, cracked, brittle, or damaged impeller to help restore proper water flow. Confirm the exact engine model and existing part number before ordering; year, serial-number, shaft-length, and installation-specific conditions are not provided in the available fitment record.
- Replacement water pump impeller for selected Honda Marine four-stroke outboards.
- Customer-facing OEM reference: Honda 19210-ZY9-H01.
- Single impeller product, not a complete water pump service kit.
- Correct keyway alignment and installation direction are required during installation.
Part Number Reference
Use the following manufacturer reference to compare with the part removed from your engine.
| Brand | Part Number |
|---|---|
| Honda Marine | 19210-ZY9-H01 |
Engine & Model Compatibility
The company fitment record identifies the following Honda Marine four-stroke models. The model, stroke, and OEM reference should be considered together when checking compatibility.
| Brand | Model | Stroke | OEM Part No. | Fitment Notes |
|---|---|---|---|---|
| Honda Marine | BF80A | 4-Stroke | 19210-ZY9-H01 | Confirm the exact model designation before ordering. |
| Honda Marine | BF80AK1 | 4-Stroke | 19210-ZY9-H01 | Confirm the exact model designation before ordering. |
| Honda Marine | BFT80AK1 | 4-Stroke | 19210-ZY9-H01 | Confirm the exact model designation before ordering. |
| Honda Marine | BF90DK4 | 4-Stroke | 19210-ZY9-H01 | Confirm the exact model designation before ordering. |
| Honda Marine | BF90DK5 | 4-Stroke | 19210-ZY9-H01 | Confirm the exact model designation before ordering. |
| Honda Marine | BFT100AK1 | 4-Stroke | 19210-ZY9-H01 | Confirm the exact model designation before ordering. |
| Honda Marine | BF100A | 4-Stroke | 19210-ZY9-H01 | Confirm the exact model designation before ordering. |
| Honda Marine | BF100AK1 | 4-Stroke | 19210-ZY9-H01 | Confirm the exact model designation before ordering. |
No Tohatsu fitment is stated in the company record for this product. Do not rely on a cross-reference alone; verify your engine's model and the number printed on the original impeller or service documentation.
Technical Specs
- Product Type
- Water pump impeller
- Application
- Selected Honda Marine four-stroke outboards
- OEM Reference
- Honda 19210-ZY9-H01
- Product Format
- Single replacement component
- Installation
- Water-pump service installation; keyway alignment required
What’s in the Box
- 1 x Water pump impeller
This is a single impeller listing rather than a complete water pump service kit. Gaskets, O-rings, housing components, and other service hardware are not identified as included. Obtain any required additional parts separately according to the engine service manual.
Installation Notes
- Switch off the engine, disconnect the battery where appropriate, and allow the engine to cool before service.
- Place the outboard in a stable service position and remove the lower unit according to the manufacturer's service procedure.
- Remove the water-pump housing cover and note the arrangement and condition of the existing components.
- Remove the old impeller and inspect the key, keyway, housing, wear plate, and seals for wear or damage.
- Clean the pump components and confirm that the replacement impeller matches the original application.
- Install the key in the driveshaft keyway and align the impeller correctly with the key.
- Lubricate the impeller and pump housing only as permitted by the engine service manual. Do not use an incompatible lubricant.
- Install the housing while rotating the driveshaft in the correct operating direction so the impeller vanes are positioned properly.
- Reassemble the water pump and lower unit using any required gaskets or seals and tighten fasteners to the manufacturer's specifications.
- Run the engine using a safe water supply and check for proper cooling-water discharge before returning the boat to service.
Follow the official Honda service manual for detailed disassembly, torque values, sealing requirements, and cooling-system testing procedures.
Troubleshooting & FAQ
How do I know if this impeller fits my Honda engine?
Confirm that your engine is one of the listed Honda models—BF80A, BF80AK1, BFT80AK1, BF90DK4, BF90DK5, BFT100AK1, BF100A, or BF100AK1—and compare the original part number with Honda 19210-ZY9-H01. If the model designation, serial range, or original part differs, consult the engine service manual or a qualified marine technician before ordering.
What are the signs of a failing water pump impeller?
Possible signs include overheating, reduced cooling-water flow from the telltale outlet, an intermittent water stream, or visible cracking, brittleness, deformation, or missing vane material when the impeller is inspected.
Is this a complete water pump kit?
No. This listing is for one water pump impeller. Gaskets, O-rings, keys, wear plates, and other water-pump service parts are not identified as included.
Does the impeller include a key or gasket?
Additional key, gasket, O-ring, and service-kit components are not identified as included with this single impeller listing. Check the parts required for your specific engine before beginning installation.
Can I install the impeller myself?
Installation may be suitable for an experienced owner with the correct tools and service information. Because the lower unit and cooling system are involved, use the official service manual or have the work completed by a qualified marine technician.
Is this an OEM Honda part?
This listing is for a replacement impeller identified for use with Honda OEM reference 19210-ZY9-H01. The available product record does not identify it as a genuine Honda-branded component.
Will this fit a Tohatsu engine?
Tohatsu fitment is not stated in the company record for this product. Verify the exact Tohatsu model and manufacturer part number independently before considering this impeller.
Safety & Important Information
- Verify the complete engine model designation and original part number before purchase.
- Do not use model, horsepower, or brand similarities as the only basis for fitment.
- Inspect the water-pump housing, wear plate, key, seals, and related components during installation.
- Use the manufacturer's service manual for torque values, lubricants, sealing procedures, and testing.
- Stop operation immediately if the engine overheats or the cooling-water stream is weak or absent.
About Sea Sierra
- Marine Parts Selection — Replacement components for outboard maintenance and repair.
- Fitment-Focused Listings — Product information is organized around model and manufacturer reference checks.
- Service Support — Consult the appropriate service manual or a qualified marine professional for installation-specific questions.
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