Seastar HC5345-3 Front Mount Hydraulic Outboard Steering Cylinder

SeaStar HC5345-3 Front Mount Hydraulic Outboard Steering Cylinder

Heavy-Duty Hydraulic Steering Cylinder for Single, Twin & Triple Outboard Engines

The Dometic SeaStar HC53453 is a high-performance front mount hydraulic steering cylinder designed for single, twin, or triple outboard engine installations. Built to meet the demands of today’s heavier, higher-horsepower engines, this cylinder features robust construction, a new 8-hole end gland sealing system, and positionable stainless steel ORB fittings for superior performance and easy installation.

With enhanced durability, improved hose routing, and compatibility with all SeaStar helm pumps and power assist systems, the HC5345-3 is ideal for center console boats, offshore fishing vessels, and high-performance cruisers.

Key Features & Benefits

✔ Supports Up to 700 HP (Total Power, Counter-Rotating) – Ideal for single, twin, or triple engine setups.

✔ Independent Engine Tilt – Allows separate engine tilt control on multi-engine installations.

✔ Robust & Corrosion-Resistant Design – Engineered to withstand repeated compression and harsh marine environments.

✔ Upgraded Sealing System – New 8-hole end gland design and proprietary sealing system enhance durability and simplify servicing.

✔ Positionable Stainless ORB Fittings – Upgraded from 1/4" NPT to -5 ORB stainless steel fittings for easier, leak-free installation and improved hose routing.

✔ Smooth & Responsive Steering – Designed to work with all SeaStar helm pumps, including Power Assist systems.

✔ Variable Lock-to-Lock Turns – Adjusts with helm selection to deliver a tailored steering response.

Technical Specifications

Ideal Applications

• Center Console Boats
• Offshore Fishing Boats
• Cruisers
• Single, Twin & Triple Outboard Configurations

Included in the Box

• HC5345-3 Hydraulic Steering Cylinder
• HA5438 Remote Fill Kit
• Pre-installed -5 ORB Adjustable Stainless Fittings
• Installation Instructions

Downloads & Resources:

• SeaStar Hydraulic Front Mount Cylinder Installation [PDF] 
• SeaStar Single Outboard Engine Hydraulic Cylinder Application Guide [PDF] 
• SeaStar Front Mount Cylinder Fill and Bleeding Instruction [PDF] 
• SeaStar Hydraulic Steering Selection Guide [PDF]

Will This Cylinder Work on my Boat?

• If you have a Single Outboard Engine (Normal Use)

You May Also Consider Purchasing:

• HA5430H: 1qt SeaStar Hydraulic Steering Fluid 
• HA5438: 1x Bottle Filler Kit
• PA6010: 1x SeaStar Power Assist Unit w/ AutoPilot Pump - Simply Add In Between the Helm and Cylinder Lines for car like steering
• HO51XX: 1x SeaStar Outboard Hose Kits

Questions?

• Tech Support: Tech Support Page
• Check Stock: Stock Inquiry Page
• Request a Shipping Quote: Request Quote Page

• No Sales Tax on Purchases Outside of California
• 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
• FREE 2 Day Air Shipping to the Lower 48 States, USPS Priority Mail to AK, HI, USVI & Puerto Rico

International Customers: We Ship Worldwide, Shipping Cost May Quote Too High on Our Website, contact us for a quote.