Hi stmjxxi,

Short answer is not yet.
I need to take the ESCs and motors out of the boat to put the centre BEC power wires back (currently folded up and taped) and also add the external suppressors.

"Power down on the receiver line" suggests that the receiver battery was down or low, or the receiver power switch turned off before the switch on the ESCs.
Is my understanding correct. At first I wasn't sure what you were getting at, but the solution is straight forward.

Do you think I should do this procedure on both ESCS, as either or both could have been affected.