SR100/185T 12V Retracting Thruster Kit (185mm) – Side-Power

SR100/185T Retracting Thruster Kit, 12V, 185mm

The SR100 185 retractable bow thruster (SR100/185T-12V) is a 12V bow thruster designed for precise low-speed maneuvering on boats where a traditional fixed tunnel installation may be difficult due to hull shape, space constraints, or performance considerations. The unit deploys for docking control and retracts when not in use to help minimize drag.

side power SR100 12v tunnel thruster

Key performance specs:

• • Thrust at 12VDC: 256 lbs (116 kg)

  • Thrust at 10.5VDC: 220 lbs (100 kg)

  • Power @ 10.5VDC: 10.5 hp (7.8 kW)

  • Typical boat size: 40–55 ft (12–17 m)

  • Tunnel diameter (I.D.): 7.3 in (185 mm)

  • Weight: 88 lbs (40 kg)

  • Speed control: On/Off

  • Recommended fuse size: 500 A (SMANL500)

  • Minimum battery capacity: 1425 CCA SAE

• Easy to use control panel (SM8700) with status feedback from thruster (sold separately)

Panel, Touch panel for SR Retracting Thruster S-link, 12/24v

side power SR100 bow and stern thruster

This model is engineered for bow or stern installation depending on hull layout and maneuvering requirements, supporting balanced control when pairing bow and stern thrusters on larger yachts.

stern thruster tunnel kit

Compatibility & requirements to plan upfront:

• Power system: 12VDC supply (high-current DC thruster installation).

• Tunnel requirement: 185 mm (7.3″) tunnel I.D. must match the thruster specification.

• Electrical protection: 500 A fuse sizing is part of the published setup guidance.

• Battery capability: plan battery and cabling around the stated 1425 CCA SAE minimum.

• Performance reality check: thrust figures are manufacturer-rated; installation variables (tunnel geometry, voltage drop, immersion) can influence real-world output.

ct80 electric tunnel thruster

For correct sizing, compare models by tunnel diameter, thrust range, and intended boat length. When evaluating alternatives such as ct80 electric tunnel thruster, the SR100/185T’s published fit is centered on 185 mm tunnels and 40–55 ft vessels with up to 256 lbs (116 kg) thrust at 12V.

Why buy it

• Reduced drag underway: retractable architecture supports a cleaner hull when the thruster is stowed, a core advantage over permanent tunnel-only solutions.
• Strong, published thrust for docking control: up to 256 lbs (116 kg) @ 12VDC for confident low-speed handling in marinas and tight fairways.
• Optimized for the 185 mm class: purpose-built around the 185 mm tunnel size commonly used on 40–55 ft yachts, supporting predictable integration planning.
• System-grade features from Side-Power/Sleipner platform: documentation highlights system elements such as S-Link communication and marine-duty feature sets for SR-series retracts.
• Flexible application as a stern tunnel thruster: suitable for owners planning a balanced handling package (bow + stern) without overcomplicating the control philosophy (On/Off).
• Clean integration within a sidepower thruster with tunnel setup: supports a complete thruster system approach (thruster + tunnel + controls + cabling + fusing) for predictable results.