RedactedNarrative: OPERATOR OF V1 STATED THAT HE WAS MOTORING ON LAKE LANGHOFFER WHEN HE HEARD A LOUD BANG WHEN HE NOTICED FIRE AND SMOKE COMING FROM THE REAR OF V1.  HE ATTEMPTED UNSUCCESSFULLY TO RETRIEVE THE FIRE EXTINGUISHER.  OPERATOR RECEIVED HELP FROM ANOTHER BOATER AND WAS ABLE TO GET OUT V1 SAFELY. 
  
  UPON INSPECTION AND INTERVIEW, OPERATOR HAD JUST FUELED UP PRIOR TO LAUNCHING; SO IGNITION OF SPILLED FUEL SUSPECTED.  NO MECHANICAL WORK HAD BEEN DONE RECENTLY.