Water Pump Impeller Kit for Mercury 4-Stroke Outboards & MerCruiser Alpha One Gen 2 – Replaces 47-43026T2
Water Pump Impeller Kit for Mercury 4-Stroke Outboards & MerCruiser Alpha One Gen 2 – Replaces 47-43026T2 is backordered and will ship as soon as it is back in stock.
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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.
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Water Pump Impeller Kit for Mercury 4-Stroke Outboards & MerCru...
Water Pump Impeller Kit for Mercury 4-Stroke Outboards & MerCruiser Alpha One Gen 2 – Replaces 47-43026T2 is backordered and will ship as soon as it is back in stock.
Product Details
This water pump impeller kit fits selected Mercury Marine 4-stroke outboards, including Bigfoot and Jet models, and MerCruiser Alpha One Gen 2 sterndrives. It replaces the Mercury reference 47-43026T2 and helps maintain proper cooling-water circulation during engine operation.
The kit is intended for selected Mercury outboards from 30 HP through 300 HP, MerCruiser Alpha One Generation 2 drives, Vazer models, and specific Chrysler/Force outboards. Always confirm the engine model, year, stroke, and serial-number range before ordering.
This aftermarket replacement impeller kit interchanges with the listed OEM and aftermarket references, including Mercury 47-43026T2, Sierra 18-3056, and GLM 89630.
- Direct replacement water-pump impeller kit for selected marine applications.
- Made from durable neoprene/marine-grade CR rubber for freshwater and saltwater service.
- Includes the impeller, drive key, and two replacement gaskets for the listed service.
Part Number Matrix
Use this matrix to compare verified reference numbers for the replacement impeller.
| Brand | Part Number |
|---|---|
| Mercury | 47-43026T2 |
| Mercury | 47-43026 |
| Mercury | 47-430262 |
| Mercury | 8M0025709 |
| Sierra | 18-3056 |
| GLM | 89630 |
| CEF Marine | 500301 |
| Mallory | 9-45307 |
Engine & Model Compatibility
Confirm the complete engine model and serial number before installation. The following applications are listed for reference and must be checked against the specific engine.
For Mercury Marine outboards, the impeller is listed for selected 4-stroke models from 30 HP through 300 HP, including Bigfoot and Jet-drive versions. For MerCruiser sterndrives, it is listed for Alpha One Generation 2 drives with serial numbers D494569 and above, as well as Vazer models. Selected Chrysler/Force applications include 75 HP, 90 HP, and 120 HP models manufactured between 1995 and 1999.
| Brand | Model | Rated HP | Stroke | Years / Serial Conditions | OEM Part No. |
|---|---|---|---|---|---|
| Mercury | 30/40/45/50/60 HP Bigfoot | 30–60 | 4-Stroke | Bigfoot models | 47-43026T2 |
| Mercury | 60 HP | 60 | 4-Stroke | 3-cylinder Bigfoot, D000750 and above | 47-43026T2 |
| Mercury | 65 HP Jet | 65 | 4-Stroke | Serial 0D283222 and above | 47-43026T2 |
| Mercury | 70 HP | 70 | 4-Stroke | Serial B110054 and above | 47-43026T2 |
| Mercury | 75 HP | 75 | 4-Stroke | 3-cylinder, serial A996142 and above | 47-43026T2 |
| Mercury | 75 HP | 75 | 4-Stroke | Serial 0G960500 and above | 47-43026T2 |
| Mercury | 80 HP | 80 | 4-Stroke | 3-cylinder, serial A996142 and above | 47-43026T2 |
| Mercury | 80 HP Jet | 80 | 4-Stroke | Serial 0D283222 and above | 47-43026T2 |
| Mercury | 90 HP | 90 | 4-Stroke | 3-cylinder, serial A996142 and above | 47-43026T2 |
| Mercury | 90 HP | 90 | 4-Stroke | Serial 0G960500 and above | 47-43026T2 |
| Mercury | 100 HP | 100 | 4-Stroke | 4-cylinder, serial B209468 and above | 47-43026T2 |
| Mercury | 115 HP | 115 | 4-Stroke | 4-cylinder, serial B209468 and above | 47-43026T2 |
| Mercury | 125 HP | 125 | 4-Stroke | 4-cylinder, serial 0D283222 and above | 47-43026T2 |
| Mercury | 150 HP EFI | 150 | 4-Stroke | EFI models | 47-43026T2 |
| Mercury | V200 3.0L | 200 | 4-Stroke | DFI, serial 0G386496 and above | 47-43026T2 |
| Mercury | V225/V250 3.0L | 225–250 | 4-Stroke | Verify model and serial number | 47-43026T2 |
| Mercury | V225 3.0L | 225 | 4-Stroke | Carbureted/EFI, serial 0D280813 and above | 47-43026T2 |
| Mercury | V225 | 225 | 4-Stroke | DFI, serial 0G590000 and above | 47-43026T2 |
| MerCruiser | Alpha One Gen 2 | — | — | Serial D494569 and above | 47-43026T2 |
| MerCruiser | Vazer | — | — | All listed models; verify application | 47-43026T2 |
| Force | 75 HP | 75 | — | 1999; serial 0E345000–0E369299 | 47-430262 |
| Force | 90 HP | 90 | — | 1995–1999; serial 0E093700–0E369299 | 47-430262 |
| Force | 120 HP | 120 | — | 1995–1999; serial 0E093700–0E369299 | 47-430262 |
Technical Specs
- Product Type
- Water Pump Impeller Kit
- Installation
- Direct replacement
- Connection
- Drive-shaft key
- Housing Color
- Black
- Dimensions
- 88.0 mm diameter × 33.0 mm height (3.46 in × 1.30 in)
- Fitting Type
- 22.4 mm (0.88 in) hub shaft diameter
- Blade Count
- 6 blades
- Material
- Neoprene rubber / marine-grade CR rubber
What’s in the Box
- 1 × Water pump impeller
- 1 × Impeller drive key
- 2 × Replacement gaskets/seals
Installation Notes
- Disconnect the negative battery cable before starting work.
- Remove the lower unit or gearcase from the outboard or sterndrive leg.
- Locate and unbolt the water-pump housing cover to expose the old impeller.
- Remove the old impeller, key, gaskets, and wear plate. Note the direction in which the old impeller blades are bent.
- Clean all mating surfaces and inspect the housing for wear, cracks, or excessive grooving.
- Place the supplied impeller key into the driveshaft slot.
- Slide the new impeller onto the shaft while turning the driveshaft clockwise so the blades bend correctly inside the housing.
- Install the supplied gaskets and reassemble the pump housing. Torque fasteners according to the engine manufacturer’s specifications.
- Reinstall the lower unit, ensuring that the driveshaft and shift shaft align correctly.
- Reconnect the battery, start the engine only in water or with an appropriate flushing device, and confirm a steady tell-tale water stream.
Troubleshooting & FAQ
How do I confirm this impeller kit fits my specific engine?
Match the existing impeller reference to the Part Number Matrix, then verify the engine model, year, stroke, and serial number against the compatibility table. If any detail differs, consult the engine service manual or contact us with the complete engine information before ordering.
What are the signs of a failing water-pump impeller?
Common symptoms include overheating at idle or low speed, a weak or absent tell-tale stream, and a damaged or melted water-pump housing. Continued operation with inadequate cooling can cause serious engine damage.
How often should I replace the impeller?
As preventive maintenance, many marine technicians recommend replacing an impeller every one to two years or every 100–200 operating hours, whichever comes first. Follow the interval specified in your engine’s service manual where it differs.
Why is my engine still overheating after replacing the impeller?
Check for blocked cooling passages, a clogged tell-tale outlet, a defective thermostat, damaged gaskets, incorrect blade orientation, or a worn water-pump housing that cannot seal against the new impeller.
Is this an OEM part?
This is an aftermarket replacement kit, not an OEM component. It is intended to replace the listed reference numbers for the specified applications.
Shipping speed and cost
Typical international transit is 5–15 days. Standard shipping is free; expedited options appear at checkout where available.
Warranty and returns
The product is covered by a 1-year warranty against manufacturing defects under normal use. Returns are accepted within the applicable standard return window when the item is unused and in its original condition. Contact support with your order details for instructions.
Safety & Important Information
- Verify the reference number, dimensions, engine model, and serial-number range before purchase.
- Do not operate an outboard or sterndrive without an adequate water supply.
- This is an aftermarket replacement, not an OEM component.
- Professional installation is recommended for safe and reliable performance.
About Sea Sierra
- Pro-Grade Standards — We supply marine parts designed for dependable service in real-world operating conditions.
- Fast Global Fulfillment — Free standard delivery is available to most regions, typically within 5–15 days.
- Manufacturer-Direct Value — Fair pricing with attention to materials and quality control.
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