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)

This water pump impeller is a direct replacement for Honda Marine 4-stroke outboard models from 20 HP to 30 HP, including the BF20, BF25, and BF30 series. It is designed to fit a wide range of model years, from pre-1997 through 2007 and later.

Engineered to meet or exceed OEM specifications, this impeller ensures reliable water circulation to prevent engine overheating. It serves as a direct replacement for Honda part number 19210-ZV7-003 and several other aftermarket equivalents.

• Direct Replacement: Installs directly in the lower unit's water pump housing with no modifications required.
• Durable Construction: Made from high-quality neoprene rubber with a hardened nylon hub for longevity and performance in marine environments.
• Critical Cooling Component: Restores cooling system performance for optimal engine temperature and protection.

Part Number Cross-Reference

This table lists the OEM part number and direct aftermarket replacements for this impeller.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 1 x Water Pump Impeller (19210-ZV7-003)

Explosion Diagram

Installation Guide

1. Disconnect Power: Disconnect the spark plug leads and the negative battery terminal for safety.
2. Access Lower Unit: Shift the outboard into neutral. Remove the bolts securing the lower unit (gearcase) to the engine's upper casing.
3. Remove Lower Unit: Carefully lower the gearcase away from the engine. The driveshaft will disengage from the powerhead.
4. Open Water Pump Housing: Locate the water pump housing on top of the gearcase. Remove the bolts to lift the housing cover.
5. Inspect and Remove Old Impeller: Take note of the rotational direction of the old impeller's blades. Remove the old impeller, gasket, and wear plate. Clean any debris from the housing.
6. Install New Impeller: Lightly lubricate the inside of the housing and the new impeller with marine grease. Install the new woodruff key on the driveshaft, then slide the new impeller onto the shaft, twisting it in the direction of engine rotation to seat the blades correctly.
7. Reassemble Housing: Place the new gasket and wear plate, and reinstall the water pump housing. Tighten the bolts to the manufacturer's specified torque.
8. Reattach Lower Unit: Guide the driveshaft back into the powerhead and re-secure the lower unit with its bolts.
9. Test Operation: Reconnect the battery and spark plugs. Using a water source (flushing attachment), start the engine and check for a steady stream of water from the tell-tale outlet.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Honda engine?
A: The best method is to match your engine's model (e.g., BF25A, BF30DK2) and year against the detailed Compatible Engine Models table. Also, verify that your current impeller's part number is 19210-ZV7-003, as this is a direct replacement.

Q: What are the signs of a failing water pump impeller?
A: Key indicators include a weak or intermittent water stream from the engine's tell-tale outlet, or the engine temperature alarm activating. This signals that the engine is not being cooled properly.

Q: How often should an impeller be replaced?
A: As a general rule, replace the impeller every one to two seasons or every 100-200 hours of use. If you operate primarily in saltwater or sandy/silty water, more frequent inspection and replacement is recommended.

Q: What are the impeller's dimensions?
A: This 6-blade impeller has an overall diameter of 55.8 mm (2.19 in), a height of 20.2 mm (0.71 in), and a hub shaft diameter of 17.2 mm (0.68 in).

Q: OEM vs. Aftermarket?
A: This listing is an aftermarket replacement part (not an OEM component). We build to OEM specifications using comparable-grade materials. Production is done in an ISO9002-certified facility, and each batch is inspected for consistent performance.

Q: How fast do you ship and how much does it cost?
A: We offer fast global shipping—typically 5–15 days worldwide—and standard shipping is free. Expedited options are available at checkout depending on your location.

Q: What is your warranty and return policy?
A: This product includes a 1-year warranty against manufacturing defects under normal use. If something goes wrong, contact our support team with your order details. Returns are accepted within our standard return window (unused & in original condition); please see our policy page or reach out for instructions.

Important Notes

• Verify that the product images and specifications match your original part. If discrepancies exist—even if your model is listed—do not proceed with the purchase.
• This product is an aftermarket replacement part and is not an OEM component.
• Professional installation is recommended to ensure safety and optimal performance.

Why Choose JLM MARINE?

• Quality Assured: As a trusted manufacturer for over 20 years, we supply top marine brands globally.
• Fast Global Shipping: Free delivery worldwide in 5–15 days.
• Direct from Manufacturer: Competitive pricing without compromising quality.