Seastar HC5303-3 Inboard Hydraulic Steering Cylinder, BA125-3ATM
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The SeaStar HC5303-3 is a precision hydraulic steering cylinder engineered for inboard jet-drive applications on marine vessels. This updated model replaces the HC5303 with improved ORB (O-Ring Boss) fittings for enhanced reliability and performance. Constructed from regular marine-duty aluminum, the cylinder delivers robust performance in demanding boating environments.
Designed for single- and dual-rudder vessels, the HC5303-3 provides two-axis articulation capability and seamless autopilot interface integration. The compact 3-inch stroke (76mm) with 3.1 cubic inches (51 cc) displacement is optimized for jet-drive steering systems, offering responsive and accurate helm control. The BA 125-3 ATM pressure rating ensures safe operation within specified hydraulic system parameters.
Key Features
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3-inch stroke (76mm) for precise steering control
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3.1 cubic inches (51cc) displacement volume
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BA 125-3 ATM pressure rating for system safety
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Updated ORB fittings (improves upon HC5303)
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Marine-duty aluminum construction
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Two-axis articulation capability
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Autopilot interface compatible
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Single and dual rudder vessel applications
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Aluminum Mounting Foot (HP5611) and End Gland (HP6026) compatibility
The cylinder is designed to meet ISO 10592 standards and is backed by a 2-year limited warranty from Dometic. Installation requires professional marine technicians familiar with hydraulic steering systems. Comprehensive installation and maintenance documentation is available from the manufacturer.
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