Water Pump Impeller – Fits Mercury/MerCruiser 4.3L, 5.0L, 5.7L, 7.4L, 8.2L (Replaces 47-59362T1)

Water Pump Impeller – Fits Mercury/MerCruiser 4.3L, 5.0L, 5.7L, 7.4L, 8.2L (Replaces 47-59362T1)

This high-quality water pump impeller is a direct replacement for Mercury MerCruiser inboard and sterndrive engines. It is designed for V6/V8 models equipped with engine-mounted sea water pumps, specifically those manufactured between 1998 and 2003 that feature a one-piece pump housing and a serpentine belt.

This component directly replaces Mercury/MerCruiser part numbers 47-59362T1, 47-59362T6, 47-59362, 47-593621, and 47-59362A1, as well as several aftermarket equivalents.

• Engine Application: Fits 4.3L, 5.0L, 5.7L, 7.4L, and 8.2L V6/V8 engines.
• Installation Specifics: For use with one-piece pump housing and a serpentine belt system.
• Durable Construction: Made from a resilient neoprene compound with a solid brass core to withstand the marine environment.

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 Impeller (47-59362T1)

Installation Guide

1. Ensure the engine is off and the battery is disconnected for safety.
2. Close the seacock to prevent water from flooding the engine bay.
3. Locate the sea water pump housing on the engine block.
4. Loosen the serpentine belt to remove tension from the pump pulley.
5. Remove the bolts that secure the pump cover or the full pump housing.
6. Carefully pull out the old impeller, noting the bent direction of the vanes.
7. Clean the inside of the pump housing and inspect for scoring or damage.
8. Lightly lubricate the new impeller and housing interior with a suitable marine glycerine or soap.
9. Insert the new impeller, rotating it in the direction of engine travel to bend the vanes correctly.
10. Replace the pump cover and gasket, ensuring a tight seal, and tighten bolts evenly.
11. Re-tension the serpentine belt to the correct specification.
12. Open the seacock, start the engine, and immediately check for water leaks and proper water flow from the exhaust.

Troubleshooting & FAQ

How do I confirm this impeller fits my MerCruiser engine?
This impeller fits a wide range of V6/V8 MerCruiser engines from 1998-2003 with an engine-mounted sea water pump, one-piece housing, and serpentine belt. To be certain, please check your model and serial number against the "Compatible Engine Models" table. Verifying the OEM part number (47-59362T1) for your specific engine is the best way to ensure an exact match.

What are the signs that my water pump impeller needs replacement?
Common signs of a failing impeller include the engine running hotter than normal or overheating, a weak or inconsistent stream of water from the exhaust, and visible cracks, stiffness, or missing vanes on the impeller itself during an inspection.

How often should I replace my impeller?
For preventative maintenance, it is recommended to inspect your impeller annually and replace it every 1-2 years, regardless of appearance. An impeller that has been sitting in one position for a long time (e.g., during winter storage) can develop a "set" and lose effectiveness.

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.