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Choosing Your Boat’s Ideal Underwater Thruster: a Guide

You can have underwater electric thrusters work so well on boats as short as 20 feet. If you’re a boater, a thruster is a tool you’ll find very useful. As such, if you intend on installing a thruster, some of the aspects you should evaluate it for include:


The higher the voltage for the thruster, the less the current that will be drawn when in operation, and hence, the smaller the cables needed. It is possible to use a 24V thruster that may be powered by two or more batteries.
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Hydraulic or Electric?
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An hydraulic thruster will do if your boat already has an hydraulic system in place.

Internal or External?

External thrusters that are electric-powered can run for longer durations. Their amperage specs may be lower, resulting in the need for fewer batteries. Typically, it’s easier to install external thrusters, although they’re not great for high-speed boats.


Regarding the need for more thrust, you may prefer biased props as they do it better than the Kaplan-styled varieties. You can achieve more thrust with a dual prop, but when you have a smaller boat, a single-propeller thruster won’t disappoint.

The Thrust Factor

Thrust, which defines the push that a running boat is given, should be the most sought element of an underwater thruster. The weight and size of your boat should dictate the level of thrust required. Higher capacities for thrust are necessary for an underwater vessel that sails against heavy winds or bad weather. It is smarter to have too much thrust than not enough!

Thrust control is also an issue that may interest some boaters. If pushing the joystick more results in more application of thrust, this gives you accurate manipulation, although the mechanism is more costly. On-off thrusters are more basic and cheaper.

Remote Control

The majority of thrusters have the remote control functionality. Nonetheless, it should be an additional element as opposed to the replacement of a hard-wired control mechanism, for example a joystick or touchpad. The issue with remote control is the probability of battery juices depletion when least expected or just misplacement of the device.

Where It’ll be Located

Figure out the existing space and find a thruster that will fit squarely. The top of the tunnel ought to measure at least 75% of its diameter under water.


Consider the size and weight of your boat and costs to make sure you’re buying your thruster cost-effectively. The power of the thruster merits consideration also. Equally, essential figure out installation costs. You can finally avail the best underwater thruster for your boat after comparing costs and investigating over the internet.

Certain crucial issues that can help pinpoint the best hydraulic or electric thruster for your boat type are explained above.