Hi Tom
I have just bought one of these to go in a Springer with an old johnsons 550 motor
It is 'half installed' so I can't run it without pulling it out of the hull.
I ran it briefly when I unpacked it, and it seemed to be OK after a bit of faffing about.
ISTR that the neutral point (where the red LED is off) was very narrow and it was
very quick to start flashing when I moved the throttle lever.
Tip : Ensure that your transmitter is switched on and throttle trim is set to its neutral/mid point
then leave everything alone for 3 seconds plus when you switch the ESC on so that it can
calibrate itself - you should get a long beep.
I will pull all the electrics out the next day or two and give it another test and get
back to you if that will help.
Richard