The other day, the water was low at the lake and I ran the bow of by boat under the pier when trying to pull up to it. When this happend, it pulled apart my Minn Kota all terrain 40LB bow mount motor where the lower shaft slides into the upper shaft. I was able to loosen two set screws on a collar and put the shaft back together. Now, the indicator on top doesn't work. I have pulled off the plastic indicator and there is a little gear it sits on. This is not turning when the motor turns. Any ideas why this is happening?