RedactedNarrative: Vessel had just returned to dock from tubing on the lake.  Turned off motor while switching occupants.  Attempted to start motor back only a few feet from the dock.  The operator heard an explosion from the motor compartment and began to see smoke and fire from the compartment.  1 adult female, operator, and 6 juvenile female occupants were on board at the time of the accident.  All jumped from the vessel wearing pfds.  Due to proximity of vessel to the dock, they were able to put out the fire with use of garden hoses from the dock.  No injuries were reported beyond minor skin burns which did not require treatment beyond first aid.
  
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  There is no mention by the officer of this report as to what started the fire other than ignition of fuel vapor.