RedactedNarrative: Vessel 1 had just left the dock at public boat landing on the south end of Papoose Lake.  Operator previously started the boat on land and everything was fine.  After the boat was started at the landing it started on fire approximately 100 yards away from the landing.  The fire was extinguished but started again and all occupants voluntarily left the boat and swam to shore.  The boat was a total loss and eventually sunk.