Water Pump Impeller Kit – Fits MerCruiser Bravo 1/2/3 4.3L-7.4L V8 Engines (Replaces 47-59362T6, 47-59362T1)

Water Pump Impeller Kit – Fits MerCruiser Bravo 1/2/3 4.3L-7.4L V8 Engines

This sea water pump impeller kit is designed for MerCruiser 4.3L, 5.0L, 5.7L, 7.4L, and 8.2L V8 inboard and sterndrive engines from 1997 and later that are equipped with a one-piece pump body. It serves as a reliable replacement for maintaining your engine's cooling system.

It is a direct replacement for multiple OEM and aftermarket part numbers, ensuring wide compatibility with various MerCruiser Bravo and inboard models.

• Installation Type: Designed for engines with a one-piece sea water pump body.
• Impeller Design: Features an 8-blade neoprene impeller with a hardened nylon hub and a D-shaped shaft insert.
• Complete Kit: Includes one sea water pump impeller, one face plate, and two O-rings for a full-service replacement.

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
• 1 x Face Plate
• 2 x O-ring

Installation Guide

1. Safety First: Disconnect the engine's battery and close the seacock valve to prevent water from entering the hull.
2. Access the Pump: Locate the sea water pump on your engine. You may need to remove a belt or other components to access it.
3. Remove the Cover: Unscrew the bolts holding the pump's face plate or cover. Keep track of the screws.
4. Extract the Old Impeller: Using needle-nose pliers or an impeller puller tool, carefully grip the hub of the old impeller and pull it straight out. Note the orientation of the blades.
5. Clean and Inspect: Clean the inside of the impeller housing thoroughly. Check for scoring, cracks, or debris. Ensure the housing surfaces are smooth.
6. Prepare the New Impeller: Lubricate the inside of the pump housing and the new impeller with a water-based lubricant or liquid soap. Do not use petroleum-based grease.
7. Insert the New Impeller: Push the new impeller into the housing while twisting it in the direction of normal engine rotation to bend the blades correctly.
8. Install New Gaskets: Place the new O-ring or gasket into the groove on the pump body or cover.
9. Reassemble the Pump: Reattach the face plate, ensuring it is seated correctly. Tighten the screws in a star pattern to ensure even pressure.
10. Final Checks: Reinstall any components you removed, reconnect the battery, and open the seacock. Start the engine and immediately check the pump for any water leaks.

Troubleshooting & FAQ

How do I confirm this fits my engine?
Check your engine model and year against the compatibility chart. This kit is specifically for MerCruiser engines from 1997 and later that use a one-piece sea water pump body. Cross-reference the part numbers listed with your existing part or service manual to ensure an exact match.

What are the signs of a failing impeller?
Common signs include engine overheating at idle or low speeds, a reduced stream of water from the tell-tale outlet, and visible cracks or missing blades on the old impeller upon inspection. A worn impeller cannot pump water effectively, leading to poor cooling.

How often should I replace my water pump impeller?
For preventative maintenance, it is recommended to inspect your impeller annually and replace it every 1-2 years, depending on usage (hours) and water conditions (saltwater, sandy, or silty water may require more frequent changes). Never reuse an old impeller.

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.