Thruster Composite Gearbox - 140TT

Lewmar 140TT Composite Gearbox Kit (589156)

A complete composite gearbox replacement kit for the Lewmar 140TT bow thruster — the gear assembly that transfers motor power to the propeller, including all hardware needed for installation.

Why It's Worth It
The gearbox is the mechanical heart of the thruster — if the hardened spiral bevel gears wear, the propeller shaft seizes, or the composite housing cracks, the thruster loses performance or fails entirely. This is the OEM replacement kit straight from Lewmar, precision-matched to the 140TT's specifications rather than an aftermarket substitute. The composite construction is the same material used in the original installation — lightweight, corrosion-resistant, and maintenance-free in saltwater environments.

Use
A direct replacement for the gearbox on compatible 140TT thruster models. Compatible with the 591482 (Simple/590002), 590004 IP 2.0kW 12V, and 590003/590005 IP 2.2kW 12V units — confirm your specific thruster's model number before ordering, since other thruster models use different gearbox assemblies.

In The Box:

140 Composite Gearbox
140 Gasket
M6 Spring Washer A2
M6 x 45 Socket Head Cap Screw A2
M6 Form B Washer A2

Package Dimensions/Shipping:

Qualifies for Ground and 2 Day

Product Support:

Subscription Information:

Release Date:

Warranty:

* ALL WARRANTY IS THROUGH MANUFACTURE *