Water Pump Impeller Service Kit with Plate – Fits MerCruiser Alpha One Gen II (Replaces 47-43026Q06, 47-8M0100526)
Water Pump Impeller Service Kit with Plate – Fits MerCruiser Alpha One Gen II (Replaces 47-43026Q06, 47-8M0100526) is backordered and will ship as soon as it is back in stock.
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Water Pump Impeller Service Kit with Plate – Fits MerCruiser Alpha One Gen II (Replaces 47-43026Q06, 47-8M0100526) is backordered and will ship as soon as it is back in stock.
Product Details
This water pump impeller service kit with plate is designed for MerCruiser Alpha One Gen II sterndrives. It provides the principal service components needed to renew the water pump assembly and help restore reliable cooling-water circulation.
The kit replaces the MerCruiser/Mercury Marine references 47-43026Q06 and 47-8M0100526. Sierra references associated with this application include 18-3214 and 18-3265.
- For MerCruiser Alpha One Gen II stern-drive applications.
- Water pump service kit supplied with the pump plate.
- Helps restore water-pump performance and reduce the risk of cooling-system-related overheating caused by a worn impeller.
- Aftermarket replacement part; not an OEM MerCruiser component.
Part Number Matrix
Use the following references when comparing your original part and service requirements.
| Brand | Part Number |
|---|---|
| MerCruiser / Mercury Marine | 47-43026Q06 |
| MerCruiser / Mercury Marine | 47-8M0100526 |
| Sierra | 18-3214 |
| Sierra | 18-3265 |
Engine & Model Compatibility
Company fitment data identifies this service kit for MerCruiser Alpha One Gen II stern drives. The available company application record specifies serial number D494569 and above.
Confirm the complete sterndrive model and serial number before ordering. Do not rely on the part number alone if your drive has a different pump design, serial range, or housing configuration.
| Brand | Application | Drive Type | Serial Condition | Reference Numbers |
|---|---|---|---|---|
| MerCruiser | Alpha One Gen II | Sterndrive | D494569 and above | 47-43026Q06; 47-8M0100526 |
Technical Specs
- Product Type
- Water pump impeller service kit
- Application
- MerCruiser Alpha One Gen II sterndrive
- Kit Configuration
- Service kit with pump plate
- Installation Location
- Lower unit water pump assembly
- Product Status
- Aftermarket replacement
What’s in the Box
This listing is for a water pump service kit with the impeller and pump plate. Gaskets and sealing components required for the applicable service are included according to the kit configuration. Package contents can vary by production batch, so compare the product image and the components removed from your sterndrive before installation.
Installation Notes
- Disconnect the battery and follow the sterndrive manufacturer's safety procedures.
- Remove the lower unit according to the applicable MerCruiser service procedure.
- Open the water pump assembly and remove the old impeller, plate, gaskets, and sealing components.
- Clean the mating surfaces and inspect the pump housing, keyway, shaft, and surrounding components for wear or damage.
- Install the replacement plate, gaskets, seals, and impeller in the correct order and orientation.
- Rotate the impeller in the correct direction while seating it in the housing. Follow the manufacturer's service instructions for the specific drive.
- Reassemble the water pump and tighten fasteners to the manufacturer's specified torque.
- Reinstall the lower unit, refill the gearcase lubricant if required, and verify that all connections are secure.
- Run the engine only with an appropriate water supply and confirm proper cooling-water flow before returning the boat to service.
Troubleshooting & FAQ
How do I confirm this kit fits my Alpha One Gen II?
Check that your drive is an Alpha One Gen II and verify the serial number. The company application record specifies drives with serial number D494569 and above. Also compare the original pump plate, housing, and impeller configuration before ordering.
What are the signs of a worn water-pump impeller?
Common signs include reduced cooling-water flow, elevated engine temperature, overheating warnings, or an impeller that is cracked, hardened, deformed, or missing vanes during inspection.
How often should the impeller be replaced?
Impeller replacement is a preventive-maintenance service. Follow the interval specified in your MerCruiser service documentation and inspect the impeller sooner after extended storage, running in sandy or silty water, or any overheating event.
Does this listing include a pump plate?
Yes. The company product description identifies this application as a water pump service kit supplied with the pump plate.
Is this an OEM part?
No. This is an aftermarket replacement kit intended to replace the listed MerCruiser/Mercury Marine references. MerCruiser and Mercury are trademarks of their respective owners.
Safety & Important Information
- Verify the Alpha One Gen II model, serial number, original pump configuration, and part-number references before purchase.
- This listing is for a stern-drive water-pump service application; do not assume fitment to an outboard or another sterndrive generation.
- Use the appropriate service manual and torque specifications for installation.
- Professional installation is recommended if you are not experienced with sterndrive lower-unit service.
About Sea Sierra
- Marine Replacement Parts — Practical aftermarket components for routine marine maintenance and repair.
- Application-Focused Listings — Product information is organized around model, serial, and part-number checks.
- Service Support — Compare your original component and application details before installation.
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