Power Steering Pump for MerCruiser Alpha One & Bravo Sterndrives – 4.3L, 5.0L, 5.7L, 7.4L & 8.2L V6/V8
Power Steering Pump for MerCruiser Alpha One & Bravo Sterndrives – 4.3L, 5.0L, 5.7L, 7.4L & 8.2L V6/V8 is backordered and will ship as soon as it is back in stock.
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Delivery and Shipping
Delivery and Shipping
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Power Steering Pump for MerCruiser Alpha One & Bravo Sterndrive...
Power Steering Pump for MerCruiser Alpha One & Bravo Sterndrives – 4.3L, 5.0L, 5.7L, 7.4L & 8.2L V6/V8 is backordered and will ship as soon as it is back in stock.
Product Details
This is a single aftermarket power steering pump for older GM-based MerCruiser sterndrive applications. The pump is intended for MerCruiser Alpha One and Bravo systems used with 4.3L V6, 5.0L and 5.7L small-block V8, and 7.4L and 8.2L big-block V8 engines.
The application is associated with older MerCruiser marine power-steering assemblies used primarily from the 1980s through the early 2000s. It is supplied as one replacement pump, not as a kit. Confirm the original pump, mounting arrangement, hose connections, and engine/drive application before ordering.
- Replacement power steering pump for selected MerCruiser sterndrive systems.
- Designed for GM-based MerCruiser engine applications from the listed engine families.
- Applicable to selected Alpha One and Bravo sterndrive packages.
- Compare the original pump and connection layout before installation.
Part Number Matrix
The following numbers are listed as application and replacement references for this pump. Number listings alone do not replace a physical comparison of the original part.
| Reference Type | Part Number |
|---|---|
| Aftermarket reference | 18-7508 Sierra Marine |
| MerCruiser reference | 16792A1 |
| MerCruiser reference | 16792A33 |
| MerCruiser reference | 16792A39 |
| MerCruiser reference | 90496A5 |
| MerCruiser reference | 71317A1 |
| MerCruiser reference | 8M0063185 |
| MerCruiser reference | 16792A40 |
Engine & Model Compatibility
Compatibility is based on the MerCruiser sterndrive application and the engine family. Keep the drive model, engine displacement, and original pump configuration together when checking fitment.
| Brand | Sterndrive Application | Engine Family | Displacement | Notes |
|---|---|---|---|---|
| MerCruiser | Alpha One | GM-based V6 | 4.3L | Older marine power-steering applications; verify the original pump configuration. |
| MerCruiser | Alpha One or Bravo | GM-based small-block V8 | 5.0L and 5.7L | Verify mounting and hose connections against the original pump. |
| MerCruiser | Alpha One or Bravo | GM-based big-block V8 | 7.4L and 8.2L | Application can vary; confirm the original pump and sterndrive package before purchase. |
Technical Specs
- Product Type
- Power Steering Pump
- Product Configuration
- Single replacement pump
- Application
- MerCruiser stern-drive and out-drive systems
- Compatible Sterndrives
- Selected Alpha One and Bravo applications
- Engine Families
- GM-based 4.3L V6, 5.0L and 5.7L small-block V8, 7.4L and 8.2L big-block V8
- Application Era
- Primarily older applications from the 1980s through the early 2000s
- Brand/Application
- MerCruiser marine sterndrive application
What’s in the Box
- 1 x Power Steering Pump
Installation Notes
- Consult the engine and sterndrive service manual before beginning work.
- Disconnect the vessel battery and ensure the engine is cool before servicing the steering system.
- Clean the area around the pump and place a suitable drain pan beneath the assembly.
- Record the hose routing and mounting position before removing the original pump.
- Remove the belt, hoses, and mounting hardware according to the service-manual procedure. Cap or protect open hydraulic lines to limit contamination.
- Compare the replacement pump with the original pump, including mounting points, pulley arrangement, and hose connections.
- Install the replacement pump and tighten the mounting hardware to the manufacturer’s specified torque.
- Reconnect the hoses and reinstall the belt using the correct routing and tension procedure.
- Fill the system only with the fluid specified for your MerCruiser steering system.
- Bleed the system according to the service-manual procedure, then inspect carefully for leaks.
- Test steering operation at low speed in a safe area before returning the vessel to normal service.
Troubleshooting & FAQ
Which engines is this pump intended for?
This pump is listed for older GM-based MerCruiser applications, including 4.3L V6, 5.0L and 5.7L small-block V8, and 7.4L and 8.2L big-block V8 engines. The sterndrive and original pump configuration must also match.
Does this pump fit both Alpha One and Bravo systems?
It is intended for selected Alpha One and Bravo applications. Because configurations can vary by engine and model year, compare the original pump, mounting arrangement, and hose connections before ordering.
Is this a complete kit?
No. This listing is for one replacement power steering pump. Additional hoses, brackets, pulleys, hardware, and fluid are not stated as included unless specifically supplied with the product.
How can I confirm fitment?
Match the engine displacement, sterndrive model, original pump shape and mounting points, hose routing, and the reference numbers listed above. When any of these details differ, consult a qualified marine technician or the applicable service documentation before installation.
What are common signs of a failing power steering pump?
Possible symptoms include steering-assist loss, abnormal pump noise, difficult steering, or fluid leakage. Inspect the complete steering system before replacing the pump because hoses, fittings, belts, and other components can produce similar symptoms.
What fluid should I use?
Use only the power-steering fluid specified for your particular MerCruiser system. Refer to the engine or sterndrive service manual rather than selecting fluid based only on the pump appearance.
Is this an OEM component?
This listing is for an aftermarket replacement pump. The listed manufacturer and application references are provided to help identify the intended replacement application.
Safety & Important Information
- Verify the engine displacement, sterndrive model, reference numbers, mounting arrangement, and hose connections before purchase.
- Do not rely on engine displacement alone to confirm fitment; older MerCruiser configurations can vary.
- Hydraulic steering work should be completed with the correct tools and service information.
- After installation, check fluid level, steering operation, belt routing, and all connections for leaks before normal use.
- Professional marine installation is recommended if the original pump configuration or service procedure is uncertain.
About Sea Sierra
- Marine Replacement Parts — We supply replacement components for a range of marine engine and sterndrive applications.
- Application-Focused Listings — Product references and fitment details are provided to help you compare the replacement part with your original equipment.
- Installation Awareness — Always use the applicable service information and verify the complete system before installation.
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