The ESC arrived and the boat is ready for the lake. Wal-Mart did not carry fishing reel grease for the prop shaft so I'm using generic vaseline for now. I did get some weatherstripping tape at Wal-Mart that holds my battery in place. The batteries used to slide into the motor coupler and get chewed up. Now with four pieces of foam tape on the bottom and one piece on the boat lid, the battery is gently "sandwiched" and held in place by the grippy foam. Another plus is there is a small air space around the battery for better cooling.

The Mtroniks Genesis 40 ESC is a terrible choice for a boat and I am going to replace it with a better model. This is why:
1. There is a one second delay every time you let off the throttle. If you do not wait one second before applying throttle again, it won't go. Some kind of "safety" delay. Totally unacceptable.
2. The ESC expected more throttle travel than my radio could provide. It would only work if I used the entire forward and reverse throw for forward throttle. I have a rubber band on my throttle trigger which holds it into the max reverse position.
3. No reverse (I expected this since it is a flight ESC)
4. Does not claim to be waterproof even though it is entirely potted. The instructions say to keep it away from water. I suspect it is highly water resistant though.
5. It is very big and heavy. Maybe twice as much as a typical car ESC. That makes it useless as a flight ESC so it is pretty much useless in any application. No wonder why it was only $45 on ebay.

Does anyone have any better ESC suggestions? The ones at offshoreelectrics.com look nice but so much $$$.

The good part is I can still run the boat and see what she's capable of under brushless power. I'll be using my lunch break to go to the local lake for the maiden voyage. Preliminary tests in my hot tub show lots of thrust, maybe 50% more than what I remember.