I took these pictures earlier this year and I figured I would post them to see if my theory was correct on what might have happened. My theory is that I sucked something into the pump that dinged the impeller and caused it to be out of balance which in turn caused the end of the pump shaft to be worn heavily on the one side. I might be wrong but this is what I think happened. Any other input would be greatly appreciated. Since this was taken I have replaced the shaft, impeller, wear ring, bearing, and bushings. I had it all together but I learned the hard way that you can set a pump up too tight, I set it up a .005" and it ran perfect on the trailer but as soon as I put it in the water the impeller hit the wear ring and locked up.