Water Pump Impeller Kit – Fits Mercury/Mariner 40-300 HP (Replaces 47-43026T06, 8M0100526)

Vendor: JLM Marine
Availability: In Stock
Product Type: Water Pump Impeller Kit
$41.50
$41.50
Subtotal: $41.50

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Water Pump Impeller Kit – Fits Mercury/Mariner 40 - 300 HP (Replaces 47 - 43026T06, 8M0100526) - JLM Marine Boat Parts Limited

Water Pump Impeller Kit – Fits Mercury/Mariner 40-300 HP (Replaces 47-43026T06, 8M0100526)

$41.50

Water Pump Impeller Kit – Fits Mercury/Mariner 40-300 HP (Replaces 47-43026T06, 8M0100526)

$41.50

Water Pump Impeller Kit – Fits Mercury/Mariner 40-300 HP (Replaces 47-43026T06, 8M0100526)

This water pump impeller kit is an aftermarket replacement compatible with a wide range of Mercury and Mariner outboards from 40 to 300 HP, covering both 2-Stroke and 4-Stroke models from 1996 to the present. It also fits MerCruiser Alpha One Gen II sterndrive units with serial numbers 0D469859 and higher.

This assembly is a direct replacement for multiple OEM and aftermarket part numbers, ensuring broad compatibility and restoring proper engine cooling performance.

  • Installation Type: Direct replacement for a straightforward installation.
  • Performance: Designed for higher flow rates to deliver improved and reliable cooling.
  • Complete Kit: Includes all necessary components for a full service, including the impeller, wear plate, housing, gaskets, and seals.

Part Number Cross-Reference

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

Brand Part Number
Mercury 47-43026T06 / 8M0100526
Mercury 47-43026Q06
Sierra 18-3214
GLM 12042
Mallory 9-48313
Honda 06192-ZW1-003

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.

Mercury/Mariner Outboards

Brand Model Rated HP Stroke Years OEM Part No. Notes
Mercury Bigfoot/Command Thrust 40-60 4-Stroke 1999–Present 47-43026T06/8M0100526
Mercury Bigfoot 60 2-Stroke 1999–Present 47-43026T06/8M0100526 S/N 0D000750 & above
Mercury Outboard 70-90 2-Stroke 1996–Present 47-43026T06/8M0100526 S/N 0A996142 & above
Mercury Outboard 75-115 4-Stroke 1999–Present 47-43026T06/8M0100526
Mercury Outboard 100-125 2-Stroke 1996–Present 47-43026T06/8M0100526 4-cyl models without insulator screws
Mercury EFI 135-150 4-Stroke 2005–Present 47-43026T06/8M0100526
Mercury Verado 4-cyl 135-175 4-Stroke 2005–Present 47-43026T06/8M0100526 S/N 1B227000-2B576734
Mercury Verado 6-cyl 200-300 4-Stroke 2005–Present 47-43026T06/8M0100526 With 4.80 dia. torpedo gearcases
Mercury Outboard 200-250 2-Stroke EFI 1996–2010 47-43026T06/8M0100526 3.0L models
Mercury OptiMax 75-125 2-Stroke DFI 1999–2012 47-43026T06/8M0100526 1.5L 3-cylinder models
Mercury Pro XS 115 4-Stroke 2016–Present 47-43026T06/8M0100526 S/N 2B225488 & above
Mercury Pro XS 115 2-Stroke DFI 2005–2012 47-43026T06/8M0100526 S/N 1B751825-2B123429
Mercury OptiMax 200-225 2-Stroke DFI 1996–2010 47-43026T06/8M0100526 6-cylinder 2.5L models
Mercury Pro Verado 200-300 4-Stroke 2016–Present 47-43026T06/8M0100526

MerCruiser Sterndrive

Brand Model Rated HP Stroke Years OEM Part No. Notes
MerCruiser Alpha One Gen II N/A N/A 1991–Present 47-43026T06/8M0100526 S/N 0D469859 & above

Technical Specifications

Specification Value
Product Type Water Pump Impeller Kit
Installation Direct Replacement
Other Technical Attributes Designed for higher flow rates and improved cooling

Package Contents

  • 1 x Impeller (47-43026T2)
  • 1 x Impeller Key
  • 2 x Impeller Gasket (27-817277)
  • 1 x Face Seal (26-816575A2)
  • 1 x Seal Ring Gasket (26-45577)
  • 2 x O-Ring (25-21836)
  • 1 x Face Plate
  • 1 x Cover
  • 1 x Washer
  • 1 x Grommets

Installation Guide

  1. Safety First: Disconnect the battery and remove the spark plug wires to prevent accidental starting.
  2. Drop Lower Unit: Disconnect the shift linkage (if applicable) and remove the bolts securing the lower unit (gearcase). Carefully lower it from the outboard midsection.
  3. Disassemble Pump: Place the lower unit on a workbench. Remove the bolts holding the water pump housing cover in place.
  4. Remove Old Components: Lift off the housing and slide the old impeller off the driveshaft. Remove the impeller key, wear plate, and any old gaskets or seals.
  5. Clean Surfaces: Thoroughly clean the mounting surfaces on the gearcase and the inside of the housing. Remove any old gasket material or corrosion.
  6. Install New Parts: Place the new gaskets and wear plate onto the gearcase. Insert the new impeller key into the driveshaft.
  7. Install New Impeller: Slide the new impeller onto the shaft while turning the driveshaft clockwise to bend the vanes in the correct direction. Apply a light coat of marine grease or soapy water to ease installation.
  8. Reassemble Pump: Install the new housing and seals. Tighten the bolts to the manufacturer's recommended torque specifications.
  9. Reinstall Lower Unit: Carefully guide the lower unit back into place, ensuring the driveshaft, water tube, and shift shaft align properly. Reinstall and tighten bolts.
  10. Final Checks: Reconnect the shift linkage and battery. Start the engine using a water supply (flushing muffs) and confirm a steady stream from the tell-tale outlet.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my specific engine model?

A: First, check the "Compatible Engine Models" table to see if your model, HP, and year range are listed. For Mercury/MerCruiser engines, it is critical to verify your serial number against the notes in the table. You can use the provided serial number guide to help locate it. Cross-referencing the OEM part number (e.g., 47-43026T06, 8M0100526) with your engine's service manual is the most reliable method.

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

A: The most common symptoms are engine overheating, especially at idle or low speeds, a weak or intermittent water stream from the "tell-tale" outlet, or a low water pressure reading on your gauges. A brittle or cracked impeller discovered during inspection also requires immediate replacement.

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

A: As a general rule for preventative maintenance, it is highly recommended to replace the impeller every 1 to 2 years or every 100-200 hours of operation, whichever occurs first. This interval can be shorter if you frequently operate in sandy or silty water.

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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