The SEP40/125S is a bow thruster for aluminum tunnel applications, developed for boats that require a compact 12V unit matched to a 125 mm tunnel format. It is intended for installations where tunnel material, electrical platform, and maneuvering requirements all need to work together within a smaller thruster setup.

This model delivers 40 kg, or 88 lb, of thrust and is built for a 125 mm tunnel. It features proportional or speed-controlled operation together with ignition-protected construction, combining controlled thrust response with a configuration specifically intended for use with an aluminum tunnel. Its aluminum tunnel compatibility is one of the main characteristics that separates it from a more general tunnel thruster listing.

The SEP40/125S is matched to boats in the 26 to 34 foot range, making it relevant for smaller vessels that need dependable maneuvering assistance without moving into a larger thruster platform. Its 12V layout also makes it a practical fit for boats already built around a 12V electrical system. For owners, builders, and installers looking for a compact 125 mm thruster designed for aluminum tunnel use, this model offers a focused solution for smaller bow applications with controlled performance and ignition-protected construction.

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Weight 34 lbs
Dimensions 20 × 12 × 12 in
Speed Control

Proportional

Power Supply

12V

Tunnel Diameter

125mm (5")

Boat Size

26-34 ft

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