This afternoon I solved the puzzle of why my 40 year old PCRy engine motor turned counter-clockwise while all the other Athearn motors turned clockwise, with the same polarity DC power applied to the motors. Somewhere back in forgotten time, I took the motor apart and then reassembled it with the center magnet reversed. So, today I again took it apart, turned the tubular magnet, reassembled it and it now turns clockwise like it is suppose to do.

When dissembling the engine you will need to twist the weights to pry them off the ends of the motor shaft. Other than that be very careful when you take the brass straps off the top and bottom or you will loose the small spring and brushes under each one.