SeaStar HC5345-3 Hydraulic Boat Outboard Steering Cylinder - Rebuild

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1-2 day turnaround


SeaStar HC5345-3 Hydraulic Boat Outboard Steering Cylinder - Rebuild (REPAIR ONLY)


  • Over an extended period of time, the HC5345/HC5345-3 cylinder seals begin to leak, causing a loss of steering fluid.
  • If your SeaStar cylinder (ram / actuator) is rebuildable, we have the capability to repair it here at our facility.
  • Most SeaStar cylinders are still available for purchase or at the very least there is a similar replacement. See our SeaStar Hydraulic cylinder page for more information.
  • You can purchase a HC5345-3 new cylinder here.

What Cylinders Do We Rebuild?

  • We rebuild both the HC5345 and updated HC5345-3 cylinder

How Much Does it Cost?

  • $230 + Shipping
  • The rebuild cost is $150
  • The cost of the seal kit is $80

How Long Does it Take for the cylinder to be Rebuilt?

  • 1-2 day turnaround for most rebuilds

How To Remove and Ship The cylinder:

  • 2 Line Systems:
    1. Remove steering lines from cylinder (cap steering lines and mark Port and Stbd)
    2. Drain Oil from cylinder
    3. Place in plastic bag (so any residual oil does not leak into box)

How to Place a Rebuild Order:

  • Add this part to your cart
  • Checkout like you normally would
  • The shipping cost you pay is only to receive your information
  • One of our Customer Service reps will contact you with confirmation of the order
  • Include a note with your return shipping information, phone # & order #
  • Once we receive the cylinder and evaluate it, we will call you for your payment information
  • 1-2 day turnaround and we will ship the cylinder back to you

2nd Option:

  • Include a note in the box with return address, contact, and cylinder information, no need to checkout online.

Send your cylinder to the following address:

Seatech Marine Products, Inc.

Attn: Service Dept.

2608 Shelter Island Dr.

San Diego, CA 92106

Suite 101


Other Info:

  • US Based Business
  • We use the SeaStar repair seal kit that corresponds with your cylinder
  • The HA5430H SeaStar Fluid is used in boat hydraulic steering
  • Techs with 30+ years of experience
  • We are an authorized Seastar Hydraulic repair center
  • Formerly Teleflex, Seastar is now Dometic Marine

Questions? Please contact our sales and technical representatives for more information.

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