SeaStar HC5345-3 Front Mount Hydraulic Outboard Steering Cylinder | Up to 300HP Single Engine

The SeaStar HC5345-3 Front Mount Hydraulic Outboard Steering Cylinder is the industry-standard hydraulic steering cylinder designed to deliver smooth, precise, and reliable steering performance for a wide range of outboard-powered boats. Engineered for single-engine applications up to 300 HP and twin-engine setups up to 600 HP combined, this heavy-duty cylinder is ideal for fishing boats, center consoles, bay boats, and recreational vessels.

Built with SeaStar's proven front-mount pivot design, the HC5345-3 provides exceptional steering response while allowing full engine articulation and independent tilt on twin-engine installations. Its ultra-corrosion-resistant construction and improved sealing system are designed to withstand harsh freshwater and saltwater environments, delivering years of dependable performance.

Featuring a 1.375" bore, 8" stroke, and 8.34 cu. in. balanced displacement, the HC5345-3 is compatible with a wide variety of Mercury, Yamaha, Suzuki, Honda, Johnson, and Evinrude outboards, making it one of the most versatile hydraulic steering cylinders on the market.

Key Features

✔ Suitable for single outboards up to 300 HP
✔ Supports twin-engine applications up to 600 HP combined
✔ Front-mount pivot design for smooth, responsive steering
✔ Allows independent engine tilt in twin-engine installations
✔ Ultra-corrosion-resistant construction for saltwater durability
✔ Improved seal and bearing design for enhanced service life
✔ Compact footprint fits most splash wells
✔ Compatible with SeaStar hydraulic steering systems
✔ Meets ABYC and NMMA requirements.

Specifications

• Part Number: HC5345-3
• Brand: SeaStar Solutions
• Product Type: Front Mount Hydraulic Outboard Steering Cylinder
• Cylinder Bore: 1.375" (35 mm)
• Stroke: 8" (203 mm)
• Balanced Displacement: 8.34 cu. in. (136.6 cc)
• Overall Width: 21" (544 mm)
• Maximum Single Engine Rating: 300 HP
• Maximum Twin Engine Rating: 600 HP combined
• Application: Single and twin-outboard-powered boats.

What's Included

• (1) SeaStar HC5345-3 Front Mount Hydraulic Steering Cylinder
• Mounting hardware
• Installation instructions and owner's manual