Impeller Kit – Fits Mercury/Mercruiser 4.3L-8.1L Engines (Replaces 47-862232A2, 47-8M0104229)

Vendor: JLM Marine
Availability: In Stock
Product Type: Water Pump Impeller
$28.50
$28.50
Subtotal: $28.50

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Impeller Kit – Fits Mercury/Mercruiser 4.3L - 8.1L Engines (Replaces 47 - 862232A2, 47 - 8M0104229) - JLM Marine Boat Parts Limited

Impeller Kit – Fits Mercury/Mercruiser 4.3L-8.1L Engines (Replaces 47-862232A2, 47-8M0104229)

$28.50

Impeller Kit – Fits Mercury/Mercruiser 4.3L-8.1L Engines (Replaces 47-862232A2, 47-8M0104229)

$28.50

Impeller Kit – Fits Mercury/Mercruiser 4.3L-8.1L Engines

This aftermarket raw water pump impeller kit is designed for 2004 and newer Mercruiser engines equipped with brass sea water pumps. It provides a reliable replacement for worn or damaged impellers, ensuring proper engine cooling.

This component is a direct replacement for Mercruiser V-6 and V-8 engines, including models 4.3L, 5.0L, 5.7L, 6.2L, and 8.1L, as well as Bravo Sterndrive applications from 2000 and newer with a brass sea water pump.

  • Engine Compatibility: Fits 2004+ Mercruiser engines with brass pumps.
  • Installation Type: Direct replacement impeller and O-ring.
  • Key Contents: Includes one impeller and one O-ring seal.

Part Number Cross-Reference

Use this table to confirm equivalent part numbers across OEM and aftermarket brands.

Brand Part Number
Mercury 47-862232A2
Mercury 47-862232A-2
Mercury 47-8M0104229
Sierra 18-3016
Sierra 18-3016-1

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.

Brand Model Rated HP Stroke Years OEM Part No. Notes
Mercruiser 4.3L MPI Various 4-Stroke 2004 and newer 47-862232A2/47-8M0104229 For engines with brass sea water pump
Mercruiser 5.0L Various 4-Stroke 2004 and newer 47-862232A2/47-8M0104229 For engines with brass sea water pump
Mercruiser 5.7L Various 4-Stroke 2004 and newer 47-862232A2/47-8M0104229 For engines with brass sea water pump
Mercruiser 6.2L Various 4-Stroke 2004 and newer 47-862232A2/47-8M0104229 For engines with brass sea water pump
Mercruiser 8.1L Various 4-Stroke 2004 and newer 47-862232A2/47-8M0104229 For engines with brass sea water pump
Mercruiser Bravo Sterndrive Various 4-Stroke 2000 and newer V-6 & V-8 47-862232A2/47-8M0104229 For engines with brass sea water pump

Technical Specifications

Specification Value
Product Type Raw Water Pump Impeller Kit
Installation Direct replacement for brass sea water pumps
Warranty Up to 365 days (retailer dependent)
Other Technical Attributes For brass sea water pumps only

Package Contents

  • 1 x Impeller
  • 1 x O-Ring Seal

Installation Guide

  1. Turn off the engine and close the raw water intake valve (seacock).
  2. Locate the sea water pump, typically mounted on the engine block.
  3. Remove the screws holding the pump cover plate in place.
  4. Carefully remove the cover and the old O-ring seal.
  5. Use pliers to grip the hub of the old impeller and pull it straight out. Note the direction of the vanes.
  6. Clean the inside of the pump housing and the cover plate.
  7. Lightly lubricate the new O-ring and the inside of the pump housing with marine grease or soap.
  8. Install the new impeller by pushing it in while twisting it in the direction of engine rotation to bend the vanes correctly.
  9. Place the new O-ring into its groove on the pump housing.
  10. Reinstall the cover plate and tighten the screws evenly.
  11. Open the seacock, start the engine, and immediately check for water leaks around the pump cover.

Troubleshooting & FAQ

Q: How do I confirm this fits my engine?
A: First, verify your engine model and year are listed in the compatibility table. Second, and most importantly, you must confirm your engine has a brass sea water pump. This impeller is not compatible with composite plastic pump housings.

Q: What are the signs of a failing impeller?
A: The most common symptom is engine overheating at idle or low speeds. You may also notice a weaker stream of water from the exhaust outlet. A visual inspection will reveal cracked, stiff, or missing impeller vanes.

Q: How often should I replace the impeller?
A: It is recommended to inspect the impeller annually and replace it every 1-2 years, or as specified in your engine's service manual. Replacement frequency depends on usage hours and water conditions (sandy or silty water causes faster wear).

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.

We can ship to virtually any address in the world with free shipping available for most regions.

For our typical US and Canadian customers , our shipping timeframes are as follows:

  • Amazon FBA: orders will be delivered within 1-5 business days after placing the order (during certain special periods such as major promotions, Christmas, etc., the delivery time of Amazon FBA may be affected).
  • US warehouse shipment: orders will be delivered within 5 days after placing the order.
  • China warehouse shipment: orders will be delivered about 12 days after placing the order.

When you place an order, we will estimate shipping and delivery dates for you based on the availability of your items and the shipping options you choose. Depending on the shipping provider you choose, shipping date estimates may appear on the shipping quotes page.

Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

Founded in 2002, JLM Marine has established itself as a dedicated manufacturer of high-quality marine parts, based in China. Our commitment to excellence in manufacturing has earned us the trust of top marine brands globally.

As a direct supplier, we bypass intermediaries, which allows us to offer competitive prices without compromising on quality. This approach not only supports cost-efficiency but also ensures that our customers receive the best value directly from the source.

We are excited to expand our reach through retail channels, bringing our expertise and commitment to quality directly to boat owners and enthusiasts worldwide.

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