SeaStar HC5348-3 Front Mount Hydraulic Outboard Steering Cylinder (77- 90 OMC)

SeaStar HC5348-3 Front Mount Hydraulic Outboard Steering Cylinder (77- 90 OMC) 

The Dometic SeaStar HC53483 is a high-performance, front-mount (pivoting) hydraulic steering cylinder engineered for single, twin, or triple outboard installations. Built to handle today’s heavier, higher-horsepower engines, it features robust marine-grade construction, a new 8-hole end-gland sealing system, and positionable stainless-steel ORB (-5) hose fittings for superior sealing and easier installs.

With enhanced durability, cleaner hose routing, and full compatibility with SeaStar helm pumps and Power Assist systems, the HC5348-3 is an excellent choice for center consoles, offshore fishing boats, and high-performance cruisers seeking precise, reliable steering under real-world conditions.

Key Features & Benefits

• Supports up to 700 HP (total, counter-rotating) - system/installation dependent
• Independent Engine Tilt for multi-engine rigs
• Robust, Corrosion-Resistant Design for harsh marine environments
• Upgraded 8-Hole End-Gland Sealing System for durability and easier service
• Positionable Stainless -5 ORB Fittings (upgraded from legacy 1/4" NPT) for cleaner, leak-free hose routing
• Smooth, Precise Steering Feel with all SeaStar helm pumps, incl. Power Assist
• Variable Lock-to-Lock Turns (depends on helm displacement)
• Warranty: 2-Year Limited
• Made in Canada

Will This Cylinder Work on My Boat?

Technical Specifications

• Direct Replacement for the HC5348 (earlier generation; “-3” adds -5 ORB ports and internal upgrades)
• Mount Style: Front Mount, Pivoting
• Shaft Diameter: 0.75" (19 mm)
• Stroke Length: 8.00" (203 mm)
• Cylinder Bore: 1.375" (~35 mm)
• Displacement (Fluid Volume): 8.34 cu in (136.6 cc)
• Ports / Fittings: Positionable stainless -5 ORB hose fittings (do not use NPT)
• Overall Dimensions (approx.): Width 21-3/4" (552 mm), Depth 4-7/8" (124 mm), Height 2-5/8" (67 mm)
• Weight (approx.): 9.5 lb
• Included in the Box: Complete cylinder with positionable ORB fittings, HA5438 Filler Kit & installation manual

Downloads & Resources

Spare Parts for the HC5348-3

Related Parts

Other SeaStar Parts

Questions?

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