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SeaStar HH5779-4 PRO Front Mount 1.7 Marine Hydraulic Helm Pump

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MSRP: $727.97
— You save $32.98
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SeaStar HH5779-4 PRO Front Mount 1.7 Marine Hydraulic Helm Pump

The Dometic SeaStar PRO outboard steering helms (HH5779-4) and cylinders are suited for critical high speed, single powered outboard boats, like bass, flats, combo race/ski and other performance orientated boats capable of speeds in excess of 60mph. Designed for the performance boater, Dometic SeaStar Pro is the ultimate steering system for high-speed single engine outboards.

Important: SeaStar Helm Update to -4

The latest series of helms has been redesigned to provide a better experience for the vessel operator:

  • New valve technology ensures tighter, quieter, and more responsive steering, while minimizing the potential for chattering when dealing with overrunning steering loads.
  • More durable check valves, making the entire steering system more resilient to the rigors of trailering.
  • Revamped Design to enhance their aesthetics, and has introduced a new fill port plug design for easier maintenance.
  • HH5779-4 replaces the HH5779-3, HH5779 and is the direct replacement



  • For single-engine application only
  • Single outboard engine boats that travel in excess of 60 MPH


  • 4.88 Turns lock to lock (measured with HC6345-3)
  • Only needs a 3" dash cut out
  • 3/4" Tapered steering shaft

What Comes In The Box:

  • HH5779-4 Helm Pump
  • Mounting Hardware
  • HF6004 Fitting Kit 2x ORB-5 90° repositionable elbow fittings


  • Must be used with the SeaStar PRO Kevlar Hoses (HO57XX and HO82XX)
  • Must be used with the PRO Cylinder (HC6345-3 or HC6358-3)
  • Relief valve settings 1500PSI

Downloads & Resources: 

  • SeaStar Boat Helm Installation Manual [PDF
  • SeaStar Hydraulic Steering Selection Guide [PDF]
  • SeaStar Marine Steering Catalog [PDF]
  • Dometic Seastar Hydraulic Build Guide [HERE]
  • We can rebuild your HH5779-4 [HERE]

Related Items & Spare Parts:


  • No Sales Tax on Purchases Outside of California
  • FREE 2 DAY AIR 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

International, USVI, Puerto Rican, Hawaiian & Alaskan Customers: We Ship Worldwide and USPS, Shipping Cost May Quote Too High on Our Web Site, Contact Us for A Quote.

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Warranty Information

Seatech Marine Products is an authorized dealer for Dometic that distributes Seastar Products, this part has a 2 Year Limited Warranty from them. Please visit their website for full details:
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