Water Pump Impeller – Fits Honda Marine 20–30 HP Outboards (Replaces 19210-ZV7-003)
Water Pump Impeller – Fits Honda Marine 20–30 HP Outboards (Replaces 19210-ZV7-003) is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
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Water Pump Impeller – Fits Honda Marine 20–30 HP Outboards (Replace...
Water Pump Impeller – Fits Honda Marine 20–30 HP Outboards (Replaces 19210-ZV7-003) is backordered and will ship as soon as it is back in stock.
Product Details
This is a direct replacement Water Pump Impeller – Fits Honda Marine 20–30 HP Outboards (Replaces 19210-ZV7-003). It is designed for reliable performance in Honda Marine 4-stroke 20 HP, 25 HP, and 30 HP outboard engines (including BF20, BF25, and BF30 series) covering various years from pre-1997 through 2007 and later models.
This part offers a direct interchange for Honda 19210-ZV7-003, Sierra Marine 18-3249, Mallory 9-45105, CEF 500339, and Soxa Marine 17IH008.
- Engineered for direct OEM-equivalent installation.
- Constructed from durable neoprene rubber with a hardened nylon hub for longevity.
- Also included as a component in the 06192-ZV7-000 Water Pump Minor Kit.
Part Number Matrix
Use this matrix to confirm equivalent references across OEM and aftermarket.
| Brand | Part Number |
|---|---|
| Honda | 19210-ZV7-003 |
| Sierra Marine | 18-3249 |
| Mallory | 9-45105 |
| CEF | 500339 |
| Soxa Marine | 17IH008 |
| HJB-J-138 | HJB-J-138 |
Engine & Model Compatibility
Confirm your engine model/year in the table below.
| Brand | Model | Rated HP | Stroke | Years | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Honda | BF20A | 20 | 4-Stroke | Pre-1997 and later | 19210-ZV7-003 | |
| Honda | BF25A | 25 | 4-Stroke | Pre-1997–2003 | 19210-ZV7-003 | |
| Honda | BF25AW | 25 | 4-Stroke | 1998 | 19210-ZV7-003 | |
| Honda | BF25AX | 25 | 4-Stroke | 1999 | 19210-ZV7-003 | |
| Honda | BF25AY | 25 | 4-Stroke | 2000 | 19210-ZV7-003 | |
| Honda | BF25A1 | 25 | 4-Stroke | 2001 | 19210-ZV7-003 | |
| Honda | BF25A2 | 25 | 4-Stroke | 2002 | 19210-ZV7-003 | |
| Honda | BF25A3 | 25 | 4-Stroke | 2003 | 19210-ZV7-003 | |
| Honda | BF25D4 | 25 | 4-Stroke | 2004 | 19210-ZV7-003 | |
| Honda | BF25D5 | 25 | 4-Stroke | 2005 | 19210-ZV7-003 | |
| Honda | BF25D6 | 25 | 4-Stroke | 2006 | 19210-ZV7-003 | |
| Honda | BF25DK0, BF25DK2, BF25DK3 | 25 | 4-Stroke | 2007 and later | 19210-ZV7-003 | |
| Honda | BF30A | 30 | 4-Stroke | Pre-1997–2003 | 19210-ZV7-003 | |
| Honda | BF30AW | 30 | 4-Stroke | 1998 | 19210-ZV7-003 | |
| Honda | BF30AX | 30 | 4-Stroke | 1999 | 19210-ZV7-003 | |
| Honda | BF30AY | 30 | 4-Stroke | 2000 | 19210-ZV7-003 | |
| Honda | BF30A1 | 30 | 4-Stroke | 2001 | 19210-ZV7-003 | |
| Honda | BF30A2 | 30 | 4-Stroke | 2002 | 19210-ZV7-003 | |
| Honda | BF30A3 | 30 | 4-Stroke | 2003 | 19210-ZV7-003 | |
| Honda | BF30D4 | 30 | 4-Stroke | 2004 | 19210-ZV7-003 | |
| Honda | BF30D5 | 30 | 4-Stroke | 2005 | 19210-ZV7-003 | |
| Honda | BF30D6 | 30 | 4-Stroke | 2006 | 19210-ZV7-003 | |
| Honda | BF30DK0, BF30DK2, BF30DK3 | 30 | 4-Stroke | 2007 and later | 19210-ZV7-003 |
Technical Specs
- Product Type
- Marine Outboard Water Pump Impeller
- Installation
- Direct OEM replacement
- Material
- Neoprene rubber with hardened nylon hub
- Number of Blades
- 6
- Impeller Height
- 20.2 mm (0.71 in)
- Overall Diameter
- 55.8 mm (2.19 in)
- Hub Shaft Diameter
- 17.2 mm (0.68 in)
- Weight
- 19.8 g (0.7 oz)
- Application
- Cooling system water circulation
- OEM Part Number
- 19210-ZV7-003
What’s in the Box
- 1 x Water Pump Impeller (19210-ZV7-003)
Installation Notes
- Disconnect the battery and remove the engine cover.
- Place a drain pan under the lower unit and remove the gearcase oil drain screw to empty the lower unit oil.
- Remove the bolts securing the lower unit (gearcase) to the upper engine housing.
- Carefully lower and separate the gearcase from the driveshaft housing.
- Locate and unbolt the water pump housing cover to access the impeller.
- Remove the old impeller, noting the rotational direction of the blades. Use a light lubricant for easier removal.
- Clean the housing and inspect it for wear, scoring, or corrosion. Replace the housing if damaged.
- Install the new impeller into the housing, rotating it in the correct direction to seat the blades properly. Apply a thin coat of marine grease to the housing interior.
- Reinstall the water pump housing and gasket, ensuring bolts are torqued to manufacturer specifications.
- Reassemble the lower unit to the engine, refilling the gearcase oil, and reconnect the battery.
- Start the engine in a water supply (using flushing muffs or in the water) and verify a steady stream of water from the tell-tale outlet.
Troubleshooting & FAQ
How do I know if this impeller fits my specific Honda outboard model?
This impeller fits a wide range of Honda BF20, BF25, and BF30 models. The most reliable method for confirming fitment is to match your existing part number to one of the cross-reference numbers listed in the Part Number Matrix. If you cannot find a part number, use the Engine Compatibility table to match your engine's model, horsepower, and year. When in doubt, compare the listed dimensions with your old part before installing.
What are the signs of a failing water pump impeller?
Common symptoms of a worn or damaged impeller include a weak or non-existent water stream from the "tell-tale" outlet, engine overheating alarms, and reduced engine performance. Visually, a bad impeller may have cracked, brittle, or missing blades.
How often should I replace my impeller?
For preventative maintenance, it is recommended to inspect your water pump impeller annually and replace it every 1-2 years, or every 100-200 hours of operation, depending on usage conditions. More frequent replacement may be necessary if you operate in sandy, silty, or saltwater environments.
Can this impeller cause my engine to overheat if installed incorrectly?
Yes. Proper installation is critical. If the impeller blades are bent in the wrong direction during installation, or if the keyway is not correctly aligned with the driveshaft, the pump will not circulate water effectively, leading to rapid engine overheating and potential damage.
OEM vs. Aftermarket?
This listing is an aftermarket replacement (not OEM). It is built to OEM-level specifications with comparable materials. Our parts are manufactured in an ISO 9002 facility and are batch-inspected for quality and consistency.
Shipping speed & cost
We ship worldwide quickly—typical transit is 5–15 days. Standard shipping is free, and expedited options will appear at checkout where available.
Warranty & returns
This product is covered by a 1-year warranty against manufacturing defects under normal use. If any issues arise, contact our support team with your order details. Returns are accepted within our standard window, provided the item is unused and in its original condition. Please 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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