MerCruiser Alpha One Gen II Water Pump Service Kit with Plate – Replaces 47-8M0100526
MerCruiser Alpha One Gen II Water Pump Service Kit with Plate – Replaces 47-8M0100526 is backordered and will ship as soon as it is back in stock.
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MerCruiser Alpha One Gen II Water Pump Service Kit with Plate – Rep...
MerCruiser Alpha One Gen II Water Pump Service Kit with Plate – Replaces 47-8M0100526 is backordered and will ship as soon as it is back in stock.
Product Details
This aftermarket water pump service kit with plate is designed for MerCruiser Alpha One Gen II sterndrives. It is intended for water pump service and impeller replacement, helping restore proper seawater circulation and support reliable engine cooling.
The kit is listed as a replacement for MerCruiser OEM part number 47-8M0100526. Company catalog records also list related Mercury/MerCruiser references including 47-43026Q06, 47-43026T11, 46-43024A7, 43026K06, 43026Q06, 43026Q5, and 47-8M0100527. Verify the exact drive model, serial number, original part and component layout before ordering.
- Water pump repair and service kit for MerCruiser stern-drive applications.
- Includes a water pump plate for the applicable Alpha One Gen II assembly.
- Helps renew the impeller-driven cooling water pump during routine maintenance.
- Aftermarket replacement part; not manufactured by Mercury or MerCruiser.
Part Number Matrix
The following numbers are catalog references associated with this service kit. They are provided for identification and cross-reference purposes only; they do not replace verification against the drive serial number and original parts.
| Brand or Source | Reference Number | Reference Type |
|---|---|---|
| MerCruiser | 47-8M0100526 | Primary replacement reference |
| Mercury/MerCruiser | 47-43026Q06, 47-43026T11 | Additional catalog references |
| Mercury/MerCruiser | 46-43024A7, 43026K06, 43026Q06, 43026Q5 | Additional catalog references |
| Mercury/MerCruiser | 47-8M0100527 | Additional catalog reference |
| GLM Marine | 12080, 12043 | Aftermarket cross-reference |
| Sierra Marine | 18-3214, 18-3265 | Aftermarket cross-reference |
Drive Compatibility
This product is cataloged for MerCruiser Alpha One Gen II sterndrives. The company fitment record specifies Alpha One Gen II units with serial number D494569 and above. Serial-number formatting can vary by catalog or drive identification label, so confirm the complete serial number before purchase.
| Brand | Drive | Serial Condition | Application |
|---|---|---|---|
| MerCruiser | Alpha One Gen II | D494569 and above | Water pump service and impeller repair |
Not confirmed for Alpha One Gen I, Bravo, Volvo Penta, Mercury/Mariner outboard or other sterndrive applications. Do not use the broad horsepower ranges sometimes shown in marketplace listings as a substitute for drive and serial-number verification.
Technical Specs
- Product Type
- Water pump service and impeller repair kit with plate
- Application
- MerCruiser stern drive / out drive
- Compatible Drive
- Alpha One Gen II
- Listed Serial Condition
- D494569 and above
- Primary Replacement Reference
- 47-8M0100526
- Product Construction
- Service kit supplied with water pump plate; verify the pictured components before installation
- Brand Status
- Aftermarket replacement, not OEM
What’s in the Box
This listing is for one water pump service kit with plate. The company record identifies the product as a service or repair kit with plate but does not provide a complete itemized quantity list. Match the supplied components to the product images and your original water pump assembly before installation.
- Water pump service kit
- Water pump plate
- Other service components as shown in the product images and supplied packaging
Individual fasteners, seals, gaskets, keys or additional components should not be assumed unless they are visibly included with the supplied kit.
Installation Notes
- Disconnect the battery and ensure the engine is switched off and cool.
- Place the sterndrive in a stable service position and follow the manufacturer’s service procedure.
- Remove the propeller if required for safe access, observing all manufacturer safety instructions.
- Separate the lower unit from the upper housing only if required by the applicable water pump service procedure.
- Remove the water pump housing, impeller, plate and related service parts being replaced.
- Clean all mating surfaces and inspect the driveshaft, keyway, housing and fasteners for wear or damage.
- Compare the new plate and all supplied components with the original parts before assembly.
- Install the plate, impeller, housing and seals in the correct order and orientation for the Alpha One Gen II assembly.
- Use appropriate lubricant during impeller installation where specified by the service manual.
- Torque fasteners to the MerCruiser service-manual specification. Do not guess torque values.
- Reassemble the lower unit, refill lubricants if required and reinstall the propeller according to the manufacturer’s procedure.
- Run the engine only with an adequate water supply and confirm proper cooling-water flow before normal operation.
Professional installation is recommended. Always use the service manual for the exact Alpha One Gen II drive and serial range.
Troubleshooting & FAQ
What drive does this kit fit?
The company catalog specifies MerCruiser Alpha One Gen II sterndrives, with a listed serial condition of D494569 and above. Confirm the complete serial number and compare the original water pump assembly before ordering.
Will this kit fit an Alpha One Gen I sterndrive?
Fitment for Alpha One Gen I is not confirmed. Gen I and Gen II water pump assemblies can use different components, so do not install this kit unless the drive and part references match the specified application.
Will this kit fit a Mercury or Mariner outboard?
Outboard fitment is not confirmed for this product. This listing is specifically for MerCruiser stern-drive water pump service and should not be selected solely by horsepower or a similar-looking impeller.
What are common signs that the water pump needs service?
Possible signs include overheating, reduced cooling-water flow, an overheating alarm or a damaged impeller found during inspection. Diagnose the complete cooling system before replacing parts.
How often should the impeller be replaced?
Replacement intervals depend on operating hours, storage conditions, water quality and the manufacturer’s maintenance schedule. Inspect and replace the impeller according to the MerCruiser service recommendations for your drive.
Does the kit include every component shown in the original description?
The company record identifies a water pump service kit with plate but does not provide a full itemized contents list. Confirm the actual supplied components and images before installation; do not assume that every seal, gasket, key or fastener is included.
Is this an OEM MerCruiser part?
No. This is an aftermarket replacement service kit intended for the specified application. The listed OEM and aftermarket numbers are reference numbers only.
Do I need special tools for installation?
Installation generally requires standard marine mechanical tools, and a torque wrench is recommended. Additional tools may be necessary to separate the lower unit and service the water pump safely. Follow the applicable service manual.
Shipping speed and cost
Shipping options, delivery estimates and costs are shown at checkout and depend on the destination and selected service.
Warranty and returns
Warranty and return eligibility are governed by the current store policies. Contact support before installation if the supplied parts differ from the listing or do not match your original assembly.
Safety & Important Information
- Verify the Alpha One Gen II drive designation, complete serial number and original part before ordering.
- Do not rely on a horsepower range alone to determine sterndrive fitment.
- Compare the supplied plate, impeller and related components with the original assembly before installation.
- Disconnect the battery and follow all manufacturer safety procedures during service.
- Never run the engine without an adequate water supply.
- This is an aftermarket replacement, not an OEM Mercury or MerCruiser component.
- Professional installation is recommended for safe and reliable operation.
About Sea Sierra
- Marine Parts Support — We provide replacement parts for common marine service and repair applications.
- Application-Focused Listings — Confirm drive, serial and original-part details before ordering for the best fit.
- Aftermarket Value — Practical replacement options for routine marine maintenance and repair.
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