Water Pump Impeller Kit – Fits Mercury/Mariner Outboards 40–250 HP and MerCruiser Alpha One Gen II Drives (Replaces 47-43026Q06)
Water Pump Impeller Kit – Fits Mercury/Mariner Outboards 40–250 HP and MerCruiser Alpha One Gen II Drives (Replaces 47-43026Q06) is backordered and will ship as soon as it is back in stock.
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Water Pump Impeller Kit – Fits Mercury/Mariner Outboards 40–250 HP ...
Water Pump Impeller Kit – Fits Mercury/Mariner Outboards 40–250 HP and MerCruiser Alpha One Gen II Drives (Replaces 47-43026Q06) is backordered and will ship as soon as it is back in stock.
Product Details
This comprehensive Water Pump Impeller Kit is designed for selected Mercury and Mariner outboards from 40 to 250 HP and MerCruiser Alpha One Gen II stern drives. It provides the water-pump service components needed to replace a worn impeller and renew the related gaskets, seals, plate, key, and O-rings included in the kit.
The kit is listed as a replacement for Mercury part numbers 47-43026Q06, 47-8M0100526, 47-43026Q5, and 47-43026T6/T7/T8/T10/T11, with the aftermarket cross-references Sierra 18-3214 and Sierra 18-3265. Confirm the original part, engine configuration, and serial number before ordering.
- Application: Selected Mercury/Mariner outboards and MerCruiser Alpha One Gen II stern drives.
- Service function: Replaces the water-pump impeller and associated service components included in the kit.
- Impeller material: Neoprene rubber.
- Product type: Aftermarket water-pump impeller repair kit.
Part Number Matrix
Use the following references to compare the kit with the part number shown on your original component. Cross-reference numbers should be treated as identification aids; verify the complete application before installation.
| Brand | Part Number |
|---|---|
| Mercury | 47-43026Q06 / 47-8M0100526 |
| Mercury | 47-43026Q5 |
| Mercury | 47-43026T6 / T7 / T8 / T10 / T11 |
| Sierra | 18-3214 |
| Sierra | 18-3265 |
Engine and Model Compatibility
Compatibility depends on the exact engine model, configuration, and serial-number range. The applications below represent the listed coverage for this replacement kit. Always compare the old impeller, pump components, and engine identification information before purchase.
| Brand | Model or Application | Rated HP | Stroke | Year or Serial Condition | Reference Part No. | Notes |
|---|---|---|---|---|---|---|
| Mercury | F40–F60 BigFoot / Command Thrust | 40–60 | 4-Stroke | Verify exact model and serial number | 47-43026Q06 | Confirm pump configuration before installation. |
| Mercury | 60 HP BigFoot | 60 | 2-Stroke | S/N 0D000750 and later | 47-43026Q06 | Serial-number verification is required. |
| Mercury | 70–90 HP | 70–90 | 2-Stroke | S/N 0A996142 and later | 47-43026Q06 | Serial-number verification is required. |
| Mercury | 75–115 HP | 75–115 | 4-Stroke | Verify exact model and serial number | 47-43026Q06 | Confirm the original pump components. |
| Mercury | 100–125 HP, four-cylinder | 100–125 | 2-Stroke | Verify exact model and serial number | 47-43026Q06 | Listed for models with pump-cover screws without insulators. |
| Mercury | 150 EFI | 150 | 4-Stroke | Verify exact model and serial number | 47-43026Q06 | Confirm the complete engine configuration. |
| Mercury | V-200 / 225 / 250, 3.0L | 200–250 | 2-Stroke | Verify exact model and serial number | 47-43026Q06 | Confirm the original pump design before ordering. |
| Mercury | Verado 135–175, four-cylinder | 135–175 | 4-Stroke | Various; verify serial number | 47-43026Q06 | Exact model and serial-number confirmation is required. |
MerCruiser Stern Drive Compatibility
This kit is listed for MerCruiser Alpha One Generation II stern drives with serial number 0D469859 and later. Drives with earlier serial numbers may use a different water-pump configuration and require a different service kit.
| Brand | Model | Serial Condition | Reference Part No. |
|---|---|---|---|
| MerCruiser | Alpha One Gen II | S/N 0D469859 and later | 47-43026Q06 |
Technical Specifications
- Product Type
- Water pump impeller repair kit
- Application
- Selected Mercury/Mariner outboards and MerCruiser Alpha One Gen II drives
- Installation
- Replacement service installation; verify application before fitting
- Impeller Dimensions
- 22.40 mm height × 89.00 mm diameter × 32 mm bore
- Weight
- 189 grams (6.7 oz)
- Impeller Material
- Neoprene rubber
- Warranty
- 1 year against manufacturing defects for the aftermarket replacement kit
What's in the Box
- 1 × Impeller, reference 47-43026Q02
- 1 × Impeller plate, reference 817276
- 1 × Impeller key, reference 28-8M0032833
- 1 × Seal ring gasket, reference 26-45577
- 1 × Impeller gasket, reference 27-817277
- 1 × Face seal and tool, reference 26-816575A2
- 2 × O-ring, reference 25-21836
- 2 × Drain screw gasket, reference 26-830749
Installation Notes
- Disconnect the battery and place the gear selector in neutral.
- Remove the lower unit from the driveshaft housing. Disconnect the speedometer tube if fitted.
- Place the lower unit on a secure workbench and remove the water-pump housing-cover bolts.
- Lift the housing off the driveshaft to expose the impeller assembly.
- Remove the old impeller, key, gaskets, plate, and related sealing components. Clean all mating surfaces thoroughly and remove old gasket material.
- Install the new gasket, plate, key, and impeller supplied in the kit. Use a small amount of suitable marine lubricant or dish soap to lubricate the impeller and housing interior.
- Rotate the driveshaft clockwise while pressing the impeller into the housing so the vanes are correctly oriented.
- Install the face seal and upper gasket, then refit the water-pump housing. Tighten the fasteners to the manufacturer's specified torque in a star pattern.
- Reinstall the lower unit, ensuring correct alignment of the driveshaft, shift shaft, and water tube.
- Connect an appropriate water supply, such as flushing muffs, before starting the engine. Check for a strong telltale stream and confirm that the engine does not overheat.
Follow the service manual for your exact engine or drive when removing the lower unit, setting fastener torque, and checking cooling-system operation.
Troubleshooting and FAQ
How do I find my engine's serial number?
The serial number is commonly shown on a metal tag or label on the swivel bracket, the engine mounting area, or the engine block. MerCruiser drive serial numbers may be located on the drive or transom assembly. Use the location and format specified in the service documentation for your engine or drive.
How do I know if this kit fits my Alpha One Gen II drive?
This kit is listed for MerCruiser Alpha One Gen II stern drives with serial number 0D469859 or higher. Compare the drive serial number and original water-pump components before ordering. Earlier drives may require a different kit.
What are the signs of a failing water-pump impeller?
Common signs include a weak or missing telltale stream, an engine-overheating alarm, elevated operating temperature, or reduced cooling performance. Cracked, brittle, deformed, or missing impeller vanes are also indications that replacement is required.
How often should I replace the water-pump impeller?
Replacement intervals depend on the engine manufacturer's maintenance schedule and operating conditions. Preventive replacement is especially important after extended storage or operation in saltwater, sandy water, or areas with heavy debris. Inspect the impeller whenever the lower unit is serviced.
Is this an OEM part?
No. This is an aftermarket replacement kit, not a genuine Mercury or MerCruiser component. It is supplied as a replacement for the listed applications and reference numbers. Confirm fitment and compare the included components with the original parts before installation.
What are the shipping, return, and warranty terms?
Standard shipping and return eligibility are governed by the applicable store policy. The kit is covered by a 1-year warranty against manufacturing defects under normal use. Contact support with your order details if a component arrives damaged or a manufacturing defect is found.
Safety and Important Information
- Verify the engine or drive model, serial number, original part number, and pump-component design before purchase.
- Do not install the kit if the original components differ from the supplied parts or if the application cannot be confirmed.
- This is an aftermarket replacement kit, not an original-equipment manufacturer component.
- Always supply cooling water before starting an outboard or stern-drive engine.
- Professional installation is recommended when you are not familiar with lower-unit removal or water-pump service.
About Sea Sierra
- Pro-Grade Standards — We supply marine replacement parts intended for demanding real-world service conditions.
- Global Fulfillment — Standard and expedited delivery options may be available depending on destination.
- Manufacturer-Direct Value — Our aftermarket parts are offered as practical replacement solutions for common marine service needs.
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