Hynautic 3-Line Heavy Duty Hydraulic Steering System:

SeaStar offers rugged 3-line Hynautic Heavy Duty steering systems for most work and pleasure vessels up to 70 feet. Heavy Duty helms combine one or two bi-directional axial piston pumps with pilot check and make-up check valving. The result is a unit which prevents rudder feedback, is very efficient (even at low RPM), and is immediately adaptable to multi-station use.

A wide choice of helm displacements and cylinder configurations make it easy to spec a system which can handle a variety of large boat performance requirements and accommodate most user preferences.


 - Low friction heavy duty hydraulic steering.
 - Helm/cylinder combinations for most inboards. Marine grade materials.
 - Heavy duty helms available in three displacements, to accommodate most applications and user       preferences.
 - Helms available with 1” straight shaft or 3/4” tapered. Mount facing any direction.
 - Quick air purge relief valve.
 - Fluid fill at remote reservoir.
 - Heavy duty brass cylinders. Two-axis articulation. Easy installation for single or dual rudder   vessels.
 - Meets or exceeds applicable standards.

 - Accepts most steering wheels.

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