Water Pump Impeller – Fits Honda Marine 4HP–10HP Outboards (Replaces Honda 19210-881-003, 19210-881-A01, 19210-881-A02)
Water Pump Impeller – Fits Honda Marine 4HP–10HP Outboards (Replaces Honda 19210-881-003, 19210-881-A01, 19210-881-A02) is backordered and will ship as soon as it is back in stock.
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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.
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Water Pump Impeller – Fits Honda Marine 4HP–10HP Outboards (Replace...
Water Pump Impeller – Fits Honda Marine 4HP–10HP Outboards (Replaces Honda 19210-881-003, 19210-881-A01, 19210-881-A02) is backordered and will ship as soon as it is back in stock.
Product Details
This high-quality aftermarket Water Pump Impeller – Fits Honda Marine 4HP–10HP Outboards (Replaces 19210-881-003) is designed for reliable performance in Honda Marine 4-stroke outboard engines, including 4HP, 5HP, 5.5HP, 7.5HP, 8HP, and 10HP models.
It serves as a direct replacement for several OEM and aftermarket part numbers, including Honda 19210-881-003, 19210-881-A01, 19210-881-A02, Sierra 18-3245, and more.
- Engineered for direct OEM replacement fit and function.
- Manufactured from a durable rubber/neoprene compound for longevity.
- Meets or exceeds original equipment specifications for reliable cooling.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Honda | 19210-881-003 |
| Honda | 19210-881-A01 |
| Honda | 19210-881-A02 |
| Sierra | 18-3245 |
| CEF | CEF500327 |
| GLM | GLM91008 |
| HJB | HJB-H-14A01 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
Compatibility for Honda outboards is based on the model and horsepower range. Verify that your specific model code matches the details below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Honda | BF4.5B | 4.5HP | 4-Stroke | 19210-881-003 | - | |
| Honda | BF5, BF50F | 5HP | 4-Stroke | 19210-881-003 | - | |
| Honda | BF5.5 | 5.5HP | 4-Stroke | 19210-881-003 | - | |
| Honda | BF6B-BX-D6 | 6HP | 4-Stroke | 19210-881-003 | - | |
| Honda | BF75 (7.5HP models) | 7.5HP | 4-Stroke | 19210-881-003 | Models A-B-C-D-E-F | |
| Honda | BF8AH-AK-AM-AX-B-BX | 8HP | 4-Stroke | 19210-881-003 | - | |
| Honda | BF100 (10HP models) | 10HP | 4-Stroke | 19210-881-003 | Models A-B-C-D-E-F |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Direct OEM replacement
- Housing Material
- Rubber/Neoprene compound
- Housing Color
- Black
- Dimensions
- Inner diameter (C): 14.20mm, Outer diameter (A): 41.00mm, Height (B): 23.00mm
- Other Technical Attributes
- High quality aftermarket impeller manufactured to OEM specifications
What’s in the Box
- 1 x Water Pump Impeller (19210-881-003/19210-881-A01/19210-881-A02)
Installation Notes
- Disconnect the battery and engine kill switch lanyard for safety.
- Place the engine in neutral and remove the lower unit (gearcase) by unbolting it from the engine leg.
- Locate and remove the bolts securing the water pump housing cover.
- Take note of the rotational direction of the old impeller's vanes before removing it.
- Slide the old impeller off the driveshaft, removing the drive key as well.
- Clean any debris from the housing interior and inspect it for wear or damage.
- Lightly lubricate the new impeller and the inside of the housing with marine grease.
- Install the drive key, then slide the new impeller onto the shaft while turning it clockwise to bed the vanes correctly.
- Re-install the water pump housing and torque its bolts to the manufacturer's specification.
- Re-attach the lower unit to the engine, ensuring the driveshaft and water tube align correctly.
- Once assembled, start the engine in water and verify a steady stream from the cooling system's tell-tale outlet.
Troubleshooting & FAQ
How do I know if this impeller fits my Honda outboard?
This impeller is designed for specific Honda 4HP to 10HP 4-stroke models. Please review the 'Engine & Model Compatibility' table and cross-reference your engine's model code and the OEM part number (19210-881-003). Matching these details ensures correct fitment.
What are the signs of a failing water pump impeller?
Key indicators of a worn or damaged impeller include the engine overheating at idle or low speeds, a weak or intermittent water stream from the "telltale" pisser outlet, and, upon inspection, visible cracks, stiffness, or missing vanes on the impeller itself.
How often should I replace my outboard's impeller?
For preventative maintenance, it is recommended to replace the water pump impeller every one to two years, or every 100-200 hours of operation. Frequent use in saltwater or sandy/silty conditions may require more frequent changes.
Is this a difficult part to install?
Installation requires basic mechanical skills and tools to remove the lower unit. While it can be a DIY job for many boat owners, we recommend professional installation if you are not comfortable performing this type of service.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). Built to OEM-level specifications with comparable materials. Manufactured in an ISO 9002 facility, batch-inspected for consistency.
Shipping speed & cost?
We ship worldwide quickly—typical transit 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty & returns?
Covered by a 1-year warranty against manufacturing defects under normal use. If issues arise, contact support with your order details. Returns are accepted within our standard window (unused & in original condition). See our policy page or reach out for instructions.
Safety & Important Info
- Verify images/specifications vs your original part. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safety and performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing without compromising on materials or QC.
Payment & Security
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