I have a Blackjack 26 brushless and I was wondering if anyone has had problems with the stock speed control?

The one that came with the boat got hot at one of the end capacitors, it started melting the plastic housing.
I sent it back and installed the new one. This one runs cool but it act a little crazy at time.
The rudder and propeller start working for know reason.
I turn the transmitter on install both batteries turn the switch to on and I get one beep.
The rudder turns and when I hit the trigger on the transmitter the propeller turns just few turns
until I put it in the water then it works fine. Sometime when I take it out of the water is when it gets crazy.

Am I doing something wrong? any suggestions from the pro's would be helpful.

Thanks

Bill