How to Add Water Cooling to Your RC Boat

Water cooling your motor and speed control is an effective and easy way to increase the performance of your boats electrical system. Cooling coils for motors and water pickups are available from several dealers if you’re not a “do it yourselfer” but for this how too everything will be made from scratch. This particular installation is done on a RRH Mutineer Mono and I’ll be installing the water pickup through hull.

What you need:
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How to Install a Stuffing Tube in Your RC Boat

Installing a stuffing tube in any boat is very important part of your building process. Done correctly you’re rewarded with a free running drive line with the least amount of friction thus maximizing your motors potential. Also included in this “how to” is my modification of a Warehouse Hobbies strut. These struts were designed to use a 1/8″ stub shaft and .098 flex cable which really isn’t suited to higher powered motors we have today. What we want is to run a .130 flex cable and 3/16″ shaft so a new bearing cartridge is in order, this is an easy modification and I’ll show you how I do it.
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Assembling Radio Control Boat Flex Shafts

Assembling your own flex shafts is an easy and cost effective alternative to higher priced soldered ones. The biggest advantage to “doing it yourself” is cost, a soldered flex shaft is about 18.00 and that doesn’t include shipping. Using my “glued” method the flex shaft will cost roughly 5.00.

Another advantage is you can reuse your stub shafts when a cable gets twisted or shows signs of rust/excessive wear. You could also do this with soldered shafts but the process isn’t nearly as easy and if you’re not comfortable with high temp soldering it’s best left to a person that is.
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