Black Box - Gen 1 TT140 2.2 and Up

Lewmar Bow Thruster Black Box — Gen 1 TT140 2.2+ (559003)

The control interface that translates helm commands into the electrical signals that drive your bow thruster's motor contactors — the brain between the control panel and the thrust itself.

Why It's Worth It
Rather than wiring the control panel directly into high-current contactors, the Black Box sits in between as a semiconductor switch, taking the low-current signal from the panel and converting it into the precise activation needed to run the thruster motor in either direction. If this component fails, the thruster won't respond properly to panel commands even if the motor and wiring are otherwise fine — making it a common diagnostic and replacement point for unresponsive thruster systems.

Use
A direct replacement for the Black Box on Lewmar's Gen 1 TT140 2.2 and higher tunnel thrusters. Confirm your thruster generation before ordering — Lewmar's separate Black Box Converter (model 589842) exists specifically for boats wanting to bridge an older Black Box-based thruster with newer-generation controllers, so check which control architecture your installation actually uses.

In The Box:

Black Box Control Unit

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Qualifies for Ground and 2 Day

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* ALL WARRANTY IS THROUGH MANUFACTURE *