Water Pump Rebuild Kit – Fits Honda BF75 & BF90 1996–1998 (Replaces 19021-ZW1-003)

Water Pump Rebuild Kit – Fits Honda BF75 & BF90 1996–1998 (Replaces 19021-ZW1-003)

This water pump rebuild kit is designed for Honda 4-Stroke outboard motors from 70 HP to 90 HP (1996–1998). It also serves as a cross-compatible replacement for various Mercury/Mariner and Force outboard models.

Engineered as a direct replacement for Honda part 19021-ZW1-003, Sierra parts 18-3187 and 18-3214, and Mercury part 46-43026Q06 / 47-43026Q06 / 8M0100526. This kit provides all the necessary components for a complete water pump service.

• Installation: Designed for an OEM direct fit, ensuring a precise and reliable installation.
• Materials: Components are made from marine-grade metal alloy and neoprene rubber for durability and resistance to chemical corrosion.
• Complete Service: Includes a new impeller, gaskets, plate, and seals required for a full rebuild.

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. For Mercury owners, here’s a guide to help you identify your engine’s serial/model: Mercury Serial Number Guide. You can also review exploded diagrams to verify part numbers: Mercury Parts Diagrams & Catalog.

For Honda and Force models, please confirm your engine model, year, and any serial number/frame requirements in the tables below.

Honda

Mercury/Mariner

Force/Chrysler

Technical Specifications

Package Contents

• 1 x Impeller (47-43026-1)
• 1 x Impeller Plate (817276)
• 1 x Water Pump Base to Face Plate Gasket (27-43033-1)
• 1 x Water Pump Base to Gear Housing Gasket (27-43047-1)
• 1 x Face Plate to Water Pump Cover Gasket (27-817277)
• 1 x Seal Ring (26-45577)
• 1 x Unspecified component (25-21836)

Installation Guide

Professional installation is recommended. The following is a general guide:

1. Disconnect the battery and remove the engine cover.
2. Drain the gearcase oil from the lower unit.
3. Remove the mounting bolts securing the lower unit (gearcase) to the outboard's leg.
4. Carefully separate the lower unit from the upper section.
5. Locate and unbolt the water pump housing cover.
6. Remove the old impeller, wear plate, and gaskets. Note their orientation.
7. Thoroughly clean all mating surfaces, removing any old gasket material or debris.
8. Install the new gaskets, wear plate, and impeller in the correct order. Lightly grease the impeller.
9. Reinstall the water pump housing and tighten bolts to the specified torque.
10. Re-attach the lower unit to the outboard, ensuring the driveshaft and water tube align correctly.
11. Refill the lower unit with fresh gear oil.
12. Reconnect the battery, start the engine using a water supply, and verify a strong water stream from the tell-tale outlet.

Troubleshooting & FAQ

How do I confirm this kit fits my Honda engine?
This kit is confirmed to fit Honda BF75 and BF90 models from 1997-1998 (frame number 1200001 and newer), as well as BF75AW/AT and BF90AW/AT models from 1996-1998. It is also listed for the BF70 (1996-1998). We strongly advise checking your specific model and year against the "Compatible Engine Models" table before purchasing.

My Mercury engine application lists a serial number. Why is that important?
For many Mercury and Mariner engines, manufacturers make changes mid-year. The serial number is the most accurate way to identify your specific engine build and ensure you get the correct part. Please use our linked serial number guide to verify your engine meets the requirements listed in the compatibility table.

What are the signs my water pump impeller needs to be replaced?
The most common signs of a failing water pump are the engine overheating at idle or low speeds, or a weak or absent stream of water from the "tell-tale" outlet on the motor. Regular inspection and replacement every 1-2 seasons is recommended for preventative maintenance.

What is the difference between this kit and the OEM Honda part 19021-ZW1-003?
This is an aftermarket kit designed to be a direct replacement for the OEM part. It is manufactured to meet or exceed original equipment specifications using high-quality metal alloy and neoprene rubber to ensure proper fit and long-lasting performance in marine environments.

OEM vs. Aftermarket?
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.