Bow Thruster Guide

Thrusters F.A.Q's
 

Why do I need a Thruster?

A Thruster makes boat handling, especially in tight harbours, much eaiser by gently moving the Bow with a small independently driven prop without having to use the main engine.

What size Thruster do I need for my boat?

It depends on your expectations.
Click here to see the guide

I am buying a new boat but haven’t decided to have a Thruster installed can it be fitted later?

Yes, there are plenty of installers around. It may cost a little extra and will involve hauling the boat and a few days of installation.

What Battery power do I need?

Thrusters have very powerful electric motors and it is recommended where possible to have a dedicated Battery close to the Thruster with a separate charger. This saves the problems of installing expensive, large cables from the main battery bank.

Can I install the Thruster myself?

The majority of the work involves choosing the location and installing the tunnel. A suitably qualified person should always carry out this work.

Can a Lewmar Thruster replace my existing installation/ I have a tunnel and standard fit by another manufacturer?

Yes in most cases providing the tunnel has the same internal diameter.

Performance Manoeuvring with Perfect Control

 

	TT Electric For highly controlled manoeuvring in restricted situations Lewmar's TT ELECTRIC Thrusters represent a move forward in design and function. Easy installation and maintenance free operation are benefits that will attract both builders and owners. A comprehensive program of testing has proved that the new Lewmar Thrusters deliver efficient, balanced and supremely quiet performance.
	TT Hydraulic A full range of hydraulic thrusters from 185 to 300 are available with all the benefits of the standard range TT thrusters. The compact hydraulic thrusters offer significant weight saving and extend motor running time. Hydraulic versions need to be run from an external power source.
Ignition Protected IP Thrusters are certified for use in Ignition Protected areas designed for gas boats.   Ideal for wet areas such as Stern installations. Covers can be supplied as a kit. This would only be offered as a 'waterproof' solution as the installation is the customer's responsibility.
	Custom Thruster Custom tunnel thrusters are available for larger vessels and offer optimum performance.
	Vertical Retracting Tunnel Thruster (VRTT) The VRTT offers exceptional performance by deeper immersion and minimised drag by maintaining the hull’s shape upon retraction.
	Swing Retracting Tunnel Thruster (SRTT) The Swing Retracting thruster can be mounted further forward in a vessel with a shallow forefoot or other internal space restrictions

When you are using this guide consider the kind of conditions that you will encounter, both wind and tide. It is better to have a little in reserve, choosing a higher output Thruster may cost a little extra but will give you a lot more piece of mind. The Recomendation is not only based on complex windage calculations but years of experience in supplying Thrusters to all types and construction of vessel. Before making your selection you need to consider where the Thruster will be installed. The closer to the Bow the better, lever effect but it must be installed at least 1 times the diameter of the Thruster below the water line. This is particularly important with the more powerful Thrusters where they will try to suck the air down from the surface causing cavitation, noise and loss of performance. To simplify the choices two drop down menus are shown. We have combined vessel type, displacement and sea conditions I.E. Light ( Light displacement slender powerboat). Slight is wind condition Beaufort 4, 11-16 Knots, 5-8 M/S, Moderate breeze, Small waves growing longer with many white horses. Then choose your boat length in ft or M.

We are proud to serve you with any assistance we can provide via email ask@wmjmarine.com or toll free number at
1-877-330-9758 for USA or (858) 755-1942 for International Customers.

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