SeaStar HA1203 Power Assist Replacement Motor

SeaStar HA1203 Power Assist Replacement Motor

The Dometic SeaStar HA1203 is the direct factory replacement motor for a range of SeaStar Power Assist units. Designed for high-efficiency and durability in marine environments, this replacement ensures your vessel’s hydraulic steering system continues to deliver smooth and reliable performance with minimal effort at the helm.

If your boat’s steering has become stiff or the power assist pump is failing to activate, replacing the motor may restore full operation. The HA1203 installs directly into compatible units and restores factory functionality.

Key Features & Benefits

• Genuine SeaStar Replacement Part - Not an aftermarket alternative
• Compatible with Multiple Models - Covers older and newer PA12xx and PA13xx series systems
• Maintains Smooth Hydraulic Control - Restores the low-effort feel at the helm
• Corrosion-Resistant Construction - Marine-grade materials and sealed housing
• Tested to OEM Specifications - Delivers consistent power output and performance
• Direct Replacement - No additional adapters or modifications required

Specifications

• Input Voltage: 12 or 24VDC (Automatically recognized)
• Typical Current Draw: ~3 Amps
• Max Current Draw: 50A Max, 60A Peak (1A System electronics)
• Fluid Compatibility: SeaStar Steering Fluid HA5430H or MIL Spec H5606QT
• Warranty: 2 Year Limited

Compatible with the Following Power Assist Units

Spare & Replacement Parts

Installation Notes

• Replacing the motor requires disassembling the pump housing.
• Ensure the system is depressurized before servicing.
• Use only SeaStar hydraulic steering fluid for refilling and bleeding.
• Always inspect the drive shaft, brushes, and power wires for signs of wear or corrosion before reinstallation.
• Consult SeaStar’s official service manual or a qualified technician for installation guidance.

Additional Tips

• Use our Technical Support page to ensure a new motor will resolve the issues you're.
• If your power assist system is experiencing intermittent function or loss of assist at idle, the HA1203 motor may be failing.
• This motor is included in some complete Power Assist pump assemblies, but can also be replaced independently to reduce service cost.
• Check voltage and amperage draw after installation to ensure proper function.

Downloads & Resources

Questions?

• Tech Support: Tech Support Page
• Check Stock: Stock Inquiry Page
• Request a Shipping Quote: Request Quote Page

• No Sales Tax on Purchases Outside of California
• FREE Ground Shipping to the Lower 48 States
• Buy Now Pay Later with Affirm or PayPal Pay Later
• Formerly Teleflex, Seastar is now Dometic Marine
• Seatech Marine Products, Inc. is an authorized dealer, and service center for Dometic Marine

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