I was Out West last week. The house where I was staying has a pool, so I procured a USA Toyz UDI007 'Voyager' radio controlled boat to play with. I had also read about some mods/improvements for it, and I did those.
Set up an informal work space right beside the pool. Sort of like The Dungeon, but with substantially better views, ventilation, and natural light. Fortunately I also had a nice tool box full of good tools at my disposal, so this went well.
We'll be adding some additional waterproofing, relubing the drive/propshaft, and protecting the electrical connectors.
The motor gets hot, so the manufacturer wisely fitted it with a simple water cooling coil. There is a water intake hose (blue arrow) attached to a small scoop under the hull.
That hose runs to the coil (silver coil around motor on the right), and then another hose (green arrow) exits the port side of the hull. (Me talk boat terms!).
We're going to put some silicone around those connections to make sure water can't get in. You can see the white silicone applied at the factory around a couple connections already.
There's a mount that holds the front of the shaft in place. We remove those 2 screws.
Nice vintage Craftsman pliers.
The prop is threaded, so you'll need to unscrew it from the shaft also.
No expense was spared here to make sure the prop doesn't come off and wind up in the bottom of a lake.
The prop end of the shaft is held in mainly with silicone, so I didn't want to force the whole thing out - just raise it enough to get the drive out.
Any excess will be forced out the open end of the shaft when the drive is put back in. It doesn't take a lot of grease to lubricate the drive.
I also put silicone around the cooling hose where it enters also.
The idea is to close up the points where water might enter. I don't think it will be totally waterproof, but the less water that can get in, the better - and the less chance the motor, receiver, servo, or connectors could get damaged.
The cone slides right out from the hole it's mounted in.
I also wrapped the electrical connectors with the tape for extra insurance against water.
Lots of fun.
The boat's pretty fast - I can only pilot it on full throttle before I run out of pool. I'd like to try it on a lake.
I fiddled with the adjustments on the servo arms and got it to turn tighter than it did originally. Now I can make complete circles easily in the pool.
I managed to capsize it a couple of times, and only a small amount of water got into the boat - which I think is pretty good.