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Sierra HC4645-3 BayStar Outboard Cylinder

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List Price: $680.39
Starting At: $566.99
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Sierra HC4645-3 BayStar Outboard Cylinder

The Sierra SeaStar HC4645-3 BayStar outboard cylinder is an easy and affordable way to upgrade your steering system from mechanical to hydraulic. It's compact form is made for smaller outboards up to 150HP and is able to fit most splashwells.


  • Compact design
  • Rigid ISO quality control
  • Easy to install
  • Fits most splashwells
  • Precision manufacturing
  • balanced cylinder


  • Actuation Stroke Length: 8"
  • Horse Power Rating: 150HP
  • Maximum pressure rating: 1000 psi
  • Fluid displacement: 7.25 in³
  • Shaft diameter: 0.63"
  • Allowable fluid type: SeaStar Steering Fluid

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