Water Pump Impeller Repair Kit for Select Mercury/Mariner Outboards and MerCruiser Alpha One Gen II – Replaces 8M0100526, 47-43026Q06
Water Pump Impeller Repair Kit for Select Mercury/Mariner Outboards and MerCruiser Alpha One Gen II – Replaces 8M0100526, 47-43026Q06 is backordered and will ship as soon as it is back in stock.
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Worry-free returns
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Delivery and Shipping
Delivery and Shipping
Orders are typically processed within 1–2 business days.
U.S. orders usually arrive within 6–15 days, depending on stock location and destination.
International delivery times may vary due to customs processing.
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Water Pump Impeller Repair Kit for Select Mercury/Mariner Outboards...
Water Pump Impeller Repair Kit for Select Mercury/Mariner Outboards and MerCruiser Alpha One Gen II – Replaces 8M0100526, 47-43026Q06 is backordered and will ship as soon as it is back in stock.
Product Details
This Water Pump Impeller Repair Kit is intended for selected Mercury and Mariner outboards, including the model and serial-number applications listed below, and MerCruiser Alpha One Generation II stern drives with serial numbers 0D469859 and above. Compatibility can vary by engine model, year, serial number, and configuration, so verify those details before ordering.
The kit is listed as a replacement for Mercury/Quicksilver part numbers 8M0100526 and 47-43026Q06, as well as the additional manufacturer and aftermarket reference numbers shown in the part-number matrix.
- Complete water pump service kit with impeller, seals, gaskets, hardware seals, and setting tool.
- Designed to help restore proper water-pump flow and engine cooling when installed on a compatible application.
- Direct-replacement design for service or repair of the water-pump assembly.
Part Number Matrix
Use this matrix to compare the listed manufacturer and aftermarket reference numbers. Reference numbers do not replace model and serial-number verification.
| Brand | Part Number |
|---|---|
| Mercury / Quicksilver | 8M0100526 |
| Mercury / Quicksilver | 47-43026Q06 |
| Mercury | 47-43026T11 |
| Mercury | 47-43026T10 |
| Mercury | 47-43026Q5 |
| Mercury | 47-43026T6 |
| Mercury | 47-43026T7 |
| Mercury | 47-43026T8 |
| Sierra | 18-3265 |
Engine & Model Compatibility
Confirm the exact engine model, horsepower, stroke, and serial number before purchase. The following applications are the listed compatibility references for this kit.
| Brand | Model | Rated HP | Stroke | Years / S/N | OEM Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury / Mariner | Bigfoot | 60 | 2-Stroke | S/N 0D000750+ | 8M0100526 | 3-cylinder |
| Mercury / Mariner | Standard | 70–90 | 2-Stroke | S/N 0A996142+ | 8M0100526 | 3-cylinder |
| Mercury / Mariner | Verado | 135–175 | 4-Stroke | S/N 1B227000+ | 8M0100526 | 4-cylinder |
| Mercury / Mariner | Verado | 200–225 | 4-Stroke | S/N OT980000+ | 8M0100526 | 6-cylinder |
| Mercury / Mariner | Verado | 250–275 | 4-Stroke | S/N OT801000+ | 8M0100526 | 6-cylinder |
| MerCruiser | Alpha One Gen II | Various | Various | S/N 0D469859+ | 8M0100526 | Stated stern-drive application |
Technical Specs
- Product Type
- Water pump impeller repair kit
- Installation
- Direct replacement
- Housing Material
- Various metal and rubber components
- Dimensions
- Varies by component
- Weight
- 255 g (9 oz)
- Kit Contents
- 13 total pieces across 11 listed component types, including two O-rings, two drain plug seals, and one face seal setting tool
- Key Features
- Water-pump service components designed to support proper flow and cooling on compatible applications
What’s in the Box
- 1 x Water Pump Impeller (8M0025709)
- 1 x Impeller Drive Key (8M0032833)
- 1 x Water Pump Faceplate (8172761)
- 1 x Faceplate Gasket (8M0050720)
- 1 x Water Pump Gasket (8172771)
- 1 x Face Seal (8M2014338)
- 1 x Quad Ring (455771)
- 1 x O-ring, 0.921 in. x 0.139 in. (90196)
- 2 x O-rings, 0.796 in. x 0.139 in. (21836)
- 2 x Drain Plug Seals (830749)
- 1 x Face Seal Setting Tool (818769)
Installation Notes
- Disconnect the negative battery cable for safety.
- Remove the lower unit or gearcase from the outboard or stern drive.
- Remove the bolts holding the water-pump housing and take off the housing.
- Remove the old impeller, wear plate, gaskets, and seals, noting their orientation.
- Thoroughly clean debris and corrosion from the housing and base surfaces.
- Install the applicable gasket, wear plate, and faceplate seal.
- Slide the new impeller onto the driveshaft while turning the shaft clockwise so the vanes are oriented correctly.
- Install the impeller drive key if it is not already in place.
- Reinstall the water-pump housing and tighten the bolts to the manufacturer’s specified torque.
- Reinstall the lower unit, ensuring that the driveshaft, shift shaft, and water tube are properly aligned.
- Reconnect the battery.
- Run the engine on an appropriate water supply, such as a flushing device or the water, and confirm a steady tell-tale stream.
Troubleshooting & FAQ
How do I know if this kit fits my engine?
Check the exact engine brand, model, horsepower, stroke, and serial number against the Engine & Model Compatibility table. Applications can vary within a model family, so do not rely on horsepower alone.
What are the signs of a failing water-pump impeller?
Common signs include overheating at idle or low speeds, a weak or absent tell-tale stream, and a dry, cracked, or brittle impeller found during inspection.
How often should the water-pump impeller be replaced?
For preventive maintenance, inspect and/or replace the impeller every 100–200 operating hours or at least once every one to two years, especially on boats used in saltwater. Follow the engine manufacturer’s maintenance schedule where it differs.
Is the face seal setting tool necessary for installation?
The included Face Seal Setting Tool (818769) is intended to help install the face seal correctly without damaging it and to support proper sealing of the pump assembly.
Is this an OEM component?
This listing is for an aftermarket replacement kit, not an OEM component. It is designed as a replacement for the listed applications and reference numbers.
What are the shipping options?
Typical transit is 5–15 days. Standard shipping is free, and expedited options appear at checkout where available.
What is the warranty and return policy?
The kit is covered by a 1-year warranty against manufacturing defects under normal use. Returns are accepted within the standard return window when the item is unused and in its original condition. Contact support with your order details for assistance.
Safety & Important Information
- Verify the engine model, serial number, and the original part before ordering.
- Do not operate an engine without an adequate water supply.
- Follow the engine or stern-drive service manual for disassembly, torque specifications, alignment, and testing.
- This is an aftermarket replacement kit, not an OEM component.
- Professional installation is recommended when you are not familiar with lower-unit or stern-drive service.
About Sea Sierra
- Pro-Grade Standards — Marine replacement parts engineered for demanding real-world conditions.
- Fast Global Fulfillment — Free standard delivery to most regions in 5–15 days.
- Manufacturer-Direct Value — Fair pricing with attention to materials and quality control.
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