RedactedNarrative: Vessel #1 experienced engine failure immediately after being unloaded off trailer.  Operator of Vessel #1 made several unsuccessful attempts to restart engine using ignition switch.  Operator then removed engine cover to cross the solenoid and the engine started in gear causing operator to fall overboard.  Vessel #1 began to circle operator at a high rate of speed and struck operator as he attempted to swim to shore causing cuts to his arms and legs.   After reaching shore operator was treated by Marshall County E.M.S. and refused to be transported to hospital.  After running out of fuel, Vessel #1 was towed to shore and loaded on trailer. Area of the incident was approx 200 feet west of Rooster Creek Bridge and approx 200 feet east of the north shoreline and approx 150 feet north of the south shoreline.