ORIGINAL: DUSTINNEWTON
The stock radio is fine, I have been running mine for over a year without a single problem. Make sure that your receiver isn't wet, and you may try unplugging the ESC and steering servo from it, then plugging them back up (do one at a time so you don't mis the connections up) to make sure that you ahve a good connection. Do this with the crystals on the receiver and transmitter as well, and also the bullet connectors on the motor. You may just have a loose connection somewhere. You could change your radio if you want, but many of us use the stock radio and are very happy with it, and have no problems whatsoever.
You are VERY LUCKY, Many of us have had problems with the stock radio and several guys reported watching their $300.00 dollar boat go flying into a wall on the other side of the pond. I had the same radio in my aquacraft profisherman and it glitched tiill I put in a better radio. I didn't even try my SV27 with the stock radio, once I seen it was the same as my other radio I switched it out right away. I don't like tempting fate.
If any of you guys want to risk your boat by keeping the stock radio, then by all means do so and may I say good luck to you, I will not reply about radio glitches on stock radios. I will however continue to warn new guys of the potential disaster involved by keeping the stock radio.