Water Pump Repair Kit – Fits Mercury Marine/Mariner 6, 8, 9.9 & 15 HP (Replaces 46-42089A5)

Water Pump Repair Kit – Fits Mercury Marine/Mariner 6, 8, 9.9 & 15 HP

This water pump repair kit is designed for Mercury Marine and Mariner outboard motors, providing a reliable solution for maintaining your engine’s cooling system. It is compatible with a wide range of 2-stroke (1986-2005) and 4-stroke (1994-2006) models from 6 to 15 HP.

It serves as a direct replacement for multiple OEM and aftermarket part numbers, ensuring a precise fit and restoring performance. The kit includes all essential components for a complete water pump overhaul.

• Installation Method: Direct Replacement
• Primary Component: Includes impeller 47-43038Q02 for optimal water flow.
• Engine Compatibility: Fits select Mercury, Mariner, and Force outboard engines.

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.

Technical Specifications

Package Contents

• 1 x Water Pump Impeller (Replaces 47-43038Q02)
• 1 x Impeller Base Gasket
• 1 x Water Pump Housing Gasket
• 1 x Impeller Key
• 1 x Drive Shaft Seal
• Additional Bushings, Seals, and Hardware

Installation Guide

1. Safety First: Disconnect the battery and ensure the engine is turned off and cool to the touch.
2. Access the Lower Unit: Remove the bolts securing the lower unit (gearcase) to the engine leg and carefully lower it.
3. Disassemble the Pump: Unscrew the bolts on the water pump housing to access the old impeller and other components. Note their orientation.
4. Clean and Inspect: Thoroughly clean the housing and mating surfaces. Inspect the housing for cracks, scoring, or warping.
5. Install New Components: Lightly grease the new seals and gaskets. Install the new impeller key, impeller (turn the driveshaft clockwise to seat the vanes), and gaskets.
6. Reassemble Housing: Secure the water pump housing with the provided bolts, tightening them to the manufacturer's recommended torque.
7. Reinstall Lower Unit: Guide the lower unit back into position, ensuring the driveshaft, shift shaft, and water tube align correctly. Secure with bolts.
8. Test Operation: Reconnect the battery. Start the engine in a test tank or with a water flusher to confirm water is pumping correctly from the tell-tale outlet.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my specific Mercury motor?

A: The best method is to use your engine's serial number. The compatibility table above lists the general model years and horsepower ranges this kit covers. For precise confirmation, use the Mercury Serial Number Guide linked above or consult your engine’s service manual to match the OEM part number 46-42089A5.

Q: What are the common signs that my water pump is failing?

A: Key symptoms include a weak or non-existent water stream from the tell-tale outlet, engine overheating alarms, or a noticeable decrease in engine performance. A worn or damaged impeller is the most common cause of failure.

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

A: For preventative maintenance, it is recommended to inspect the impeller annually and replace it every 1-2 years, depending on usage (e.g., hours run, saltwater vs. freshwater operation). Replacing it proactively prevents engine damage from overheating.

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.