Only a small amount of material to remove and at the time I didn’t have a drill press. I just freehanded mine with a new reamer bit and a good drill.
I do have a bench top drill press so that would be the other option though need to be careful to stay centered on the hole. Appreciate the input.
Here I believe is the culprit. Tough to see in this photo but it appears that the phase wire bundle is held in place with some “strings” and the bundle is up against the shaft at the rear of the motor. The only explanation I can think of is that either the bundle was not tied in place properly or the wires were pulled from outside and whatever strain relief is used was insufficient. I have another motor (Maytech) and white looking mostly identical, it does not show the bundle here. My guess is that the bundle rubbing against the shaft eventually wore out the insulation and caused a phase wire to contact the shaft. I have replaced the motor with a new one and no longer have the “shocking” water, nor any conductance between phase wire and shaft. I am hoping that the bad motor is fixable perhaps by removing the back plate where the wires enter and moving the bundle away from the shaft, and re-covering the worn insulation somehow.
I am a bit surprised no one else has had this problem occur and described it here.
I also bought the Flite propellor and look forward to trying it. Noted that the pitch is reversed from the white Flipsky prop. Bought a set of cheap reams including 12mm and reamed out the prop, but need to be careful to get the right depth. Centering seems to be fine.
