RedactedNarrative: Vessel 1 was docked at the owner/operator's home dock on Sebago Lake.  The dock is constructed of rock and stone.  The boat was tied to the dock with the stern facing shore and the bow facing the open lake.  
  
  The boat was tied to the stone dock with a line near the starboard side.  Operator was having difficult time starting the engine, and bypassed the key and throttle/shift level, by using a jumper cable to supply electric power from the battery directly to the starter cylnoyde.  
  
  Once electrical contact was made, the engine started running, with the boat shifted in forward gear and with throttle at higher than idle speed.  The boat drove foward and struck the shore causing damage to the vesel.