I have a 20 year old Tracker Bass Boat with a Tracker Pro Series Motorguide 30lb thrust trolling motor. Recently I noticed the directional pointer was not in sync with the actual direction of the boat.....it worstened until it seemed that the foot pedal was slipping and not turning the prop. I was able to turn the bottom of the shaft with my hand while the pointer did not turn, so I turned it until it tightened up. The shaft seemed to have just un-screwed itself. It appears to operate ok now, except the foot pedal and directional pointer are out of sync with the prop. How do I adjust those so that the foot pedal is flat and the pointer is correct while going straight? This is not one of those new wireless kinds. Thanks for any responses.