Side-Power SRP80/185T Retractable Thruster (12V, 185 mm, Proportional)

The SRP80/185T 12V is a versatile retractable stern thruster designed for yachts in the 35–48 ft range. When deployed, it functions like a traditional tunnel thruster, generating powerful sideways thrust; when retracted, it disappears flush with the hull, eliminating drag during cruising.

This model features a sealed gearleg, robust construction, and fast deployment mechanisms. As a retractable electric bow thruster / stern thruster it offers the flexibility of use both at the stern or bow, depending on your vessel’s layout.

How Retractable Stern Thrusters Work?

A retractable stern thruster is a thruster that can be stowed inside the hull when not in use, thus avoiding permanent protrusions and drag. When activated, the thruster extends below the hull, generating sideways thrust. Retractable systems are ideal for performance boats or sailboats where minimal drag is essential.

High-Performance Features

• 80–96 kg thrust range provides strong control during docking and low-speed maneuvers.
• Fast deployment/retraction ensures the thruster is ready when needed yet invisible when not in use.
• Sealed gearleg prevents water ingress and reduces maintenance.
• Electric drive system (12V) makes integration into existing 12V boat systems straightforward.
• Low drag while retracted ensures cruising performance isn’t compromised.

Joystick Bow Thruster Integration

Though primarily used as a stern thruster in many installations, the SRP80/185T is compatible with joystick control systems. This allows coordinated bow-stern maneuvering—often referred to as “joystick bow thruster” operation—even though the unit is retractable in nature. The S-Link™ communication system enables smooth integration into modern joystick docking stations.

Technical Specifications

These specifications represent typical performance; actual results depend on installation depth, hull shape, tunnel length, and system voltage stability.

Installation & Compatibility

The SRP80 can be installed in stern or bow positions depending on your boat. It requires a tunnel of 185 mm, and when retracted, sits flush against the hull. Because it is retractable, once retracted, it does not contribute to drag or cavitation during cruising.

Integrating with joystick systems is seamless via the S-Link™ network, allowing coordinated control of bow and stern thrusters for more intuitive docking.

Advantages Over Fixed Thrusters

• No drag when retracted, unlike fixed tunnel thrusters.
• Better suited for high-speed or performance-oriented vessels.
• Cleaner hull lines and less maintenance when not in use.
• Electric control and deployment with minimal mechanical complexity.

Use Cases / Applications

• Yachts in the 35–48 ft class that want stern-side maneuverability but value performance and reduced drag.
• Boats that already have a bow thruster and want the flexibility of a stern thruster for tighter docking.
• Owners upgrading from fixed thrusters to a retractable system to reduce hull drag.
• Custom builds or refits where hull lines and performance are priorities.

Accessories & Options

When ordering, consider pairing the SRP80 with:

• Joystick / proportional control panel
• S-Link™ control cabling
• Tunnel adaptors and installation hardware
• Backup switches, fuses and safety circuits

Why Choose the SRP80/185T Retractable Stern Thruster?

• Combines the best of retractable stern thruster design with practical 12V electric operation
• Provides both power and stealth—hidden when not needed
• Fits seamlessly into joystick-assisted systems
• Offers a maintenance-minimized sealed construction