19210-881-003 Water Pump Impeller for Honda BF4 BF5 BF6 BF8 BF10 BF50 BF75 BF100 | JLM Marine

Water Pump Impeller for Honda BF4 BF5 BF6 BF8 BF10 BF50 BF75 BF100 Outboard Motors

This water pump impeller is designed to fit a wide range of Honda outboard engines, including the BF4, BF5, BF6, BF8, BF10, BF50, BF75, and BF100 series. Engineered to replace OEM part numbers 19210-881-003 and 19210-881-A01, this impeller ensures reliable water circulation and optimal cooling performance for your Honda outboard motor.

This aftermarket replacement impeller is compatible with Honda models from the mid-1990s and earlier, including specific variants such as BF4 5B/B2/B3/B6/BK0/BK2/BX, BF6B/BZ/D6, BF8 (AH/AK/AM/AX/B/BX), BF10 (A through F), BF50 (F/A1/A2/A3/A4/AH/AK/AK2/AX), and BF75/BF100 series (A through F, Pre-1997). Cross-references include Honda Marine part numbers 19210-881-A02 and 19210-881-A03.

• Constructed from neoprene with a brass hub for durability and corrosion resistance
• Features 8 blades with D-shape shaft profile for precise fit
• Installation tip: Lubricate with silicone grease, glycerine, or dish soap (not included)

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 × Outboard Water Pump Impeller (Neoprene with Brass Hub)

Installation Guide

1. Disconnect the spark plug wire and ensure the engine is completely cool before beginning any work.
2. Remove the lower unit or water pump housing according to your engine's service manual.
3. Carefully extract the old impeller from the pump housing, noting its orientation and direction of blade curvature.
4. Inspect the pump housing for scoring, debris, or corrosion; clean thoroughly if needed.
5. Lubricate the new impeller generously with silicone grease, glycerine, or dish soap (lubricant not included).
6. Install the new impeller by aligning the D-shape shaft profile with the drive pin. Ensure blades curve in the correct rotation direction.
7. Gently press the impeller into the housing, rotating it slightly to help blades fold smoothly into position.
8. Reassemble the water pump housing or lower unit, ensuring all seals and gaskets are properly seated.
9. Torque all fasteners to the manufacturer's specifications as outlined in your service manual.
10. Reconnect the spark plug wire and perform a water flow test in a flushing tank or on-water to confirm proper operation.
11. Check for leaks around the pump housing and verify consistent water discharge from the telltale outlet.
12. Dispose of the old impeller responsibly and keep a replacement on hand for future maintenance.

Troubleshooting & FAQ

How do I confirm this impeller fits my Honda outboard engine?
Verify your engine model and serial number against the compatibility table above. Check that your OEM part number matches 19210-881-003, 19210-881-A01, 19210-881-A02, or 19210-881-A03. It is critical to compare the physical dimensions and shaft profile before purchase.

How often should I replace my water pump impeller?
Most marine manufacturers recommend replacing the impeller every 2–3 years or 200–300 hours of operation, whichever comes first. If you operate in sandy, silty, or debris-laden water, inspect and replace more frequently.

What are the signs that my impeller is failing?
Common symptoms include reduced water flow from the telltale (pee hole), engine overheating, steam from the powerhead, or visible damage such as missing, cracked, or melted blades. Replace immediately if any of these occur.

Can I use dish soap or water to install the impeller instead of marine grease?
While dish soap or glycerine can ease installation, they offer minimal long-term lubrication. Silicone-based marine grease is preferred as it protects the impeller during initial dry-start and reduces friction wear.

Will this aftermarket impeller perform as well as the original Honda part?
This aftermarket impeller is manufactured to OEM specifications using comparable-grade neoprene and a brass hub. It is designed to deliver reliable cooling performance equivalent to the original Honda part at a more competitive price point.

Is this an OEM part or an aftermarket replacement?
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.

How fast do you ship and how much does it cost?
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.

What is your warranty and return policy?
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.