Water Pump Impeller – Fits Honda Marine 75–150 HP (Replaces 19210-ZW1-B04, 19210-ZW1-B03, 19210-ZW1-B02)
Water Pump Impeller – Fits Honda Marine 75–150 HP (Replaces 19210-ZW1-B04, 19210-ZW1-B03, 19210-ZW1-B02) is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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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 75–150 HP (Replaces 19210-Z...
Water Pump Impeller – Fits Honda Marine 75–150 HP (Replaces 19210-ZW1-B04, 19210-ZW1-B03, 19210-ZW1-B02) is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket Water Pump Impeller – Fits Honda Marine Outboard 75–150 HP (Replaces 19210-ZW1-B04, 19210-ZW1-B03, 19210-ZW1-B02) is a direct replacement for Honda Marine 4-stroke outboard engines from 1999 to present. It is designed to restore cooling system performance and prevent engine overheating.
It interchanges with Honda part numbers 19210-ZW1-B04, 19210-ZW1-B03, and 19210-ZW1-B02, and also replaces Sierra 18-3250, CEF 500337, Mallory 9-45104, Mercury 879117, and Tohatsu HZW1-19210-B04.
- Direct OEM-spec replacement for hassle-free installation.
- Constructed from durable neoprene rubber with a hardened nylon center for longevity.
- Includes one water pump impeller as shown in the package contents.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket brands.
| Brand | Part Number |
|---|---|
| Honda | 19210-ZW1-B04 |
| Honda | 19210-ZW1-B03 |
| Honda | 19210-ZW1-B02 |
| Sierra | 18-3250 |
| CEF | 500337 |
| Mallory | 9-45104 |
| Mercury | 879117 |
| Tohatsu | HZW1-19210-B04 |
Engine & Model Compatibility
Confirm your engine model and year in the table below.
This impeller is confirmed to fit a wide range of Honda Marine 4-stroke outboards from 75 HP to 150 HP manufactured between 1999 and the present day. Please check your specific model and serial number range where applicable.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Honda | BF75A/AX/AY/A1-A6 | 75 | 4-Stroke | 1999–2006 | 19210-ZW1-B04 | Supersedes 19210-ZW1-B03/B02 |
| Honda | BF75D K0/K2 | 75 | 4-Stroke | All years, through S/N BBAJ-1200000 | 19210-ZW1-B04 | Supersedes 19210-ZW1-B03/B02 |
| Honda | BF90A/AX/AY/A1-A6 | 90 | 4-Stroke | 1999–2006 | 19210-ZW1-B04 | Supersedes 19210-ZW1-B03/B02 |
| Honda | BF90D K0/K2 | 90 | 4-Stroke | All years, through S/N BBCJ-1300000 | 19210-ZW1-B04 | Supersedes 19210-ZW1-B03/B02 |
| Honda | BF115A/D | 115 | 4-Stroke | All years | 19210-ZW1-B04 | Supersedes 19210-ZW1-B03/B02 |
| Honda | BF130A | 130 | 4-Stroke | All years | 19210-ZW1-B04 | Supersedes 19210-ZW1-B03/B02 |
| Honda | BF135A | 135 | 4-Stroke | All years | 19210-ZW1-B04 | Supersedes 19210-ZW1-B03/B02 |
| Honda | BF150A | 150 | 4-Stroke | All years | 19210-ZW1-B04 | Supersedes 19210-ZW1-B03/B02 |
Technical Specs
- Product Type
- Water Pump Impeller
- Installation
- Direct OEM replacement
- Material
- Neoprene rubber with hardened nylon center
- Dimensions
- 87.8 mm OD × 31.0 mm thickness × 23.4 mm shaft diameter
- Blade Count
- 6 blades
- Compatible Engines
- Honda Marine 4-stroke outboards 75–150 HP
What’s in the Box
- 1 x Water Pump Impeller (Replaces 19210-ZW1-B04/19210-ZW1-B03/19210-ZW1-B02)
Installation Notes
- Disconnect the battery and ensure the engine is off and cool.
- Locate and drain the lower unit gear case oil.
- Remove the lower unit (gear case) from the outboard housing.
- Unbolt and remove the water pump housing cover.
- Inspect the housing and wear plate for scoring, distortion, or cracks. Replace if damaged.
- Remove the old impeller, noting the rotational direction of the existing blades.
- Clean the housing and shaft area thoroughly. Lightly lubricate the new impeller and housing interior with glycerin or dish soap.
- Install the new impeller onto the drive shaft, rotating it in the same direction as the old one to seat the blades correctly.
- Reinstall the water pump housing, ensuring a proper seal.
- Re-attach the lower unit, refill with fresh gear oil, and reconnect the battery.
- Start the engine at idle with a proper water supply (flushing muffs) and verify water is exiting the tell-tale port.
Troubleshooting & FAQ
How do I know this impeller fits my Honda engine?
This impeller is designed for Honda 4-stroke outboards from 75 HP to 150 HP. The best way to confirm fitment is to check the tables in the 'Engine & Model Compatibility' section. Compare your engine's model, horsepower, and year. For certain models like the BF75D and BF90D, serial number ranges are provided for precise matching.
What are the signs of a failing water pump impeller?
Common symptoms include a weak or non-existent water stream from the "tell-tale" outlet, engine overheating alarms, and reduced engine performance. Visible signs on the old impeller include cracked, brittle, or broken blades, or a melted hub.
How often should a water pump impeller be replaced?
As a preventative maintenance item, it is recommended to replace the impeller every 1-2 years or every 100-200 hours of operation, whichever comes first. This interval can be shorter if the engine is used frequently in sandy, silty, or saltwater environments.
Is this a complete water pump rebuild kit?
No, this listing is for the impeller only. It does not include the housing, wear plate, gaskets, or seals. If those components are damaged, they should be purchased separately as part of a complete water pump repair kit.
What's the difference between OEM and aftermarket parts?
This listing is an aftermarket replacement (not OEM). It's built to OEM-level specifications with comparable materials and performance. Manufactured in an ISO 9002 facility and batch-inspected for consistency, it offers a reliable alternative to the original manufacturer's part.
How fast is shipping and what does it cost?
We ship worldwide quickly—typical transit is 5–15 days for most destinations. Standard shipping is free. If available for your location, expedited options and their costs will be presented at checkout.
What is the warranty and return policy?
This part is covered by a 1-year warranty against manufacturing defects under normal marine use. If you encounter any issues, please contact our support team with your order details. Returns are accepted within our standard window for unused items in their original condition. See our full policy page or reach out for instructions.
Safety & Important Info
- Verify images and specifications against your original part before purchase. If anything differs—even if your model appears compatible—do not purchase.
- This is an aftermarket replacement component, not an original equipment manufacturer (OEM) part.
- Professional installation is recommended for safety and to ensure optimal engine performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts engineered to OEM-level tolerances and rigor-tested for real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing on reliable parts without compromising on materials or quality control.
Payment & Security
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