Hey guys I have a 24 volt 82 lb thrust variable speed. Saturday on the water ther performance went down quick later for me to learn that the hot wire on the charger cable broke and I was basically running in 12 volts most of the day. Came home charged the batteries after fixing the wire and went fishing. It ran better but performance went down quicker than normal. Came home and fully charged both batteries and pushed the button on the pedal with it in full speed. The prop would turn a little but it would pulsate. Let off pedal and tried it again. It ran faster with no pulsating but was like it was very weak. I took the foot apart and it is all black and smells like burnt electrical in there. Any ideas. Is it supposed to have a black film in there. The windings don't look to be burnt.