Stern Thruster Tunnel Kit

Lewmar 140TT Stern Thruster Tunnel Kit (589110)

A T-shaped fiberglass (GRP) stern thruster tunnel kit that mounts on a flat powerboat transom — everything needed to install a 140TT thruster at the stern for added lateral control at the back of the boat.

Why It's Worth It
Bow thrusters push the front of the boat sideways — useful for docking, but the stern still swings unless you have another pivot point. A stern thruster paired with a bow thruster gives you true sideways control across the full length of the boat, letting you move parallel to a dock rather than pivoting around one end. The T-shaped tunnel design is specifically engineered for transom mounting on flat-transom powerboats, directing thrust left and right without cutting a full through-hull tunnel.

Use
Designed for mounting on flat powerboat transoms. The 140mm tunnel diameter matches the 140TT thruster series exactly — the thruster unit is sold separately and must be ordered alongside this kit. Stern kits are available in sizes from 140 to 300 across the full Lewmar TT Electric and Hydraulic thruster range.

In The Box:

140TT Stern Thruster Tunnel Kit (Thruster Sold Separately)

Package Dimensions:

Available Method: Qualifies for Ground and 2 Day

* ALL WARRANTY IS THROUGH MANUFACTURE *