Water Pump Impeller – Fits Honda Marine 4HP–10HP Outboards (Replaces 19210-881-003)

Water Pump Impeller – Fits Honda Marine 4HP–10HP Outboards (Replaces 19210-881-003)

This aftermarket water pump impeller is designed for a range of Honda Marine 4-stroke outboard engines, including 4HP, 5HP, 5.5HP, 7.5HP, 8HP, and 10HP models. It serves as a high-quality replacement manufactured to meet or exceed original equipment specifications, ensuring reliable engine cooling performance.

It directly replaces Honda part numbers 19210-881-003, 19210-881-A01, and 19210-881-A02, along with several other aftermarket equivalents.

• Installation Method: Direct OEM replacement fit.
• Material Construction: Made from a durable, tear-resistant rubber/neoprene compound for longevity.
• Package Includes: One water pump impeller.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Compatible Engine Models

Confirm your engine model/year in the table below.

Technical Specifications

Package Contents

• 1 x Water Pump Impeller (Replaces 19210-881-003 / 19210-881-A01 / 19210-881-A02)

Explosion Diagram

Installation Guide

1. Disconnect the negative battery cable for safety.
2. Remove the lower unit (gearcase) from the outboard motor.
3. Unbolt and carefully lift the water pump housing to expose the old impeller.
4. Note the rotational direction of the old impeller fins before removing it from the driveshaft.
5. Clean the impeller housing and wear plate, checking for grooves or damage.
6. Slide the new impeller onto the driveshaft, turning the shaft in the direction of engine rotation to bend the fins correctly.
7. Apply a light coat of marine grease to the inside of the housing and reinstall it.
8. Reassemble the lower unit, ensuring all bolts are torqued to manufacturer specifications.

Troubleshooting & FAQ

Q: How do I confirm this impeller fits my Honda engine?

A: The best way is to match your existing part number to one of the numbers listed in our cross-reference table. You can also check your engine's model and HP against our compatibility list. If you're unsure, consulting your owner's manual or a mechanic is recommended.

Q: What are the common signs of a worn or failed water pump impeller?

A: The most common signs include the engine overheating at idle or low speeds, a weak or non-existent water stream from the "tell-tale" outlet, or a visible cracking or hardening of the impeller's rubber fins upon inspection.

Q: How often should I replace the water pump impeller?

A: For preventative maintenance, it is recommended to replace the impeller every 1-2 years or every 100-200 hours of use, whichever comes first. This interval can be shorter if you frequently operate in sandy, silty, or saltwater conditions.

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.