RedactedNarrative: On June 20 th 2016 at 14:48 subject was operating a vessel on Patrick Henry Lake (TN 4781 H).  The vessel was a cobalt open motorboat.  Operator had grounded his vessel in the area of Point 5 to let his grandkids swim.  Upon backing the vessel off the ground, Operator stated that he had heard a loud noise.  Operator believed he struck a submerged stump.   The lower unit had been knocked completely off.  The boat then began taking on water and Operator grounded the vessel to prevent sinking.   Sgt. and I arrived on seen around 16:23, and took the individuals back to Warriors Path.   When we arrived Operator had tied the lower unit to the swim platform.  No one received any injuries from this event.
  
  I spoke with Operator and he advised me that the housing for the outboard part of the motor had broken. He had an estimate done that came out to $2,000.00. He advised me that he was going to fix it himself to save a little money.
  