Water Pump Impeller Kit – Fits Mercury/MerCruiser 35-300 HP (Replaces 47-8M0100526, 47-43026Q06)

Vendor: JLM Marine
Availability: In Stock
Product Type: Water Pump Impeller Kit
$31.00
$36.00
$31.00
Subtotal: $31.00

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jlm marine water pump impeller kit for mercury 35-300 hp 47-43026q06 black six-bladed rubber impeller with splined hub and assorted gaskets and seals

Water Pump Impeller Kit – Fits Mercury/MerCruiser 35-300 HP (Replaces 47-8M0100526, 47-43026Q06)

$36.00 $31.00

Water Pump Impeller Kit – Fits Mercury/MerCruiser 35-300 HP (Replaces 47-8M0100526, 47-43026Q06)

$36.00 $31.00

Water Pump Impeller Kit – Fits Mercury/MerCruiser 35-300 HP

This water pump impeller service kit is designed for a wide range of Mercury/Mariner outboards from 35 HP to 300 HP and MerCruiser Alpha One Gen 2 sterndrives with serial numbers 0D469859 and above. It provides a reliable, direct-fit solution for maintaining your engine’s cooling system.

This kit is a direct replacement for Mercury/Quicksilver part numbers 8M0100526 and 47-43026Q06, as well as Sierra 18-3265 and UANOFCN 8M0100526.

  • Engineered for improved water flow and cooling efficiency.
  • Constructed with a durable Neoprene marine rubber impeller, stainless steel faceplate, and non-asbestos gaskets.
  • Includes all necessary gaskets, seals, and O-rings for a complete water pump rebuild.

Part Number Cross-Reference

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

Brand Part Number
Mercury/Quicksilver 8M0100526
Mercury/Quicksilver 47-43026Q06
Sierra 18-3265
UANOFCN 8M0100526

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 Outboard

Brand Model Rated HP Stroke OEM Part No. Notes
Mercury BigFoot/Command Thrust 40-60 4-Stroke 8M0100526, 47-43026Q06
Mercury BigFoot 60 2-Stroke 8M0100526, 47-43026Q06 Serial #0D000750 and above
Mercury FourStroke 75-115 4-Stroke 8M0100526, 47-43026Q06 All models
Mercury FourStroke 150 4-Stroke 8M0100526, 47-43026Q06 All models
Mercury Standard 70-90 2-Stroke 8M0100526, 47-43026Q06 Serial #0A996142 and above
Mercury Standard 100-125 2-Stroke 8M0100526, 47-43026Q06 4 cylinder models with pump cover screws without insulators
Mercury OptiMax 200/225/250 2-Stroke 8M0100526, 47-43026Q06 3.0L V6 models
Mercury Verado 4-Stroke 8M0100526, 47-43026Q06 L4 & L6 models with 4.80" & 5.44" diameter gearcases
Mercury Various Outboard Models 35-300 2-Stroke & 4-Stroke 8M0100526, 47-43026Q06 Model specific - verify application

MerCruiser Sterndrive

Brand Model OEM Part No. Notes
MerCruiser Alpha One Gen 2 8M0100526, 47-43026Q06 Serial #0D469859 and above
MerCruiser Gear Housing Drive-2.33:1 8M0100526, 47-43026Q06 USA-0T625304/BEL-0P216185 and up

Technical Specifications

Specification Value
Product Type Water Pump Impeller Kit
Installation Direct replacement
Housing Material Non-asbestos gasket, Neoprene Marine Rubber Impeller and O-Ring, Stainless Steel Plate
Housing Color Black/Silver
Other Technical Attributes Designed for improved water flow rate and cooling efficiency

Package Contents

  • 1 x Water Pump Impeller (8M0025709)
  • 1 x Water Pump Faceplate (8172761)
  • 1 x Face Seal (8M2014338)
  • 1 x Quad Ring (455771)
  • 1 x Impeller Gasket (8M0050720)
  • 1 x Impeller Key (8M0032833)
  • 1 x Seal Ring Gasket (8172771)
  • 1 x Drain Screw Gasket (830749)
  • 2 x O-Ring (0.796 in. x 0.139 in.) (21836)
  • 1 x O-Ring (0.921 in. x 0.139 in.) (90196)
  • 1 x Face Seal Setting Tool (818769)

Explosion Diagram

Explosion Diagram

Installation Guide

  1. Disconnect Power: Disconnect the battery and shift the outboard into neutral.
  2. Access the Lower Unit: Remove the bolts securing the lower unit (gearcase) to the upper leg of the outboard.
  3. Remove the Old Pump: Carefully lower the gearcase. The water pump housing is located on top of the gearcase. Remove the bolts securing the water pump housing.
  4. Inspect and Clean: Remove the old impeller and gaskets. Clean the housing and faceplate surfaces thoroughly, ensuring they are free of old gasket material and corrosion.
  5. Install New Components: Lightly grease the new impeller and insert it into the housing, rotating the driveshaft clockwise to seat the vanes correctly. Install the new key, gaskets, and seals.
  6. Reassemble Pump Housing: Secure the new faceplate and housing with the provided bolts, tightening them to the manufacturer's specified torque.
  7. Reattach Lower Unit: Re-install the lower unit, ensuring the driveshaft, shift shaft, and water tube align correctly. Secure with bolts.
  8. Test Operation: Reconnect the battery and start the engine using a water supply (flushing muffs) to verify proper water flow from the tell-tale outlet.

Troubleshooting & FAQ

Q: How do I confirm this kit fits my specific engine?
A: The best way is to check the part number on your original water pump or in your service manual. Compare it to the cross-reference list provided (8M0100526, 47-43026Q06). You should also verify your engine model and serial number against the compatibility tables above.

Q: What are the signs of a failing water pump impeller?
A: Common signs include the engine overheating at idle or low speeds, a weak or non-existent water stream from the "tell-tale" outlet, or a cracked and brittle appearance on the old impeller's vanes during inspection.

Q: How often should I replace my water pump impeller?
A: For preventative maintenance, it is recommended to inspect the impeller annually and replace it every 1-2 years, or every 100-200 hours of use, depending on operating conditions (especially in saltwater or sandy/silty water).

Q: Is this an OEM part?
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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