RedactedNarrative: VESSLE ONE WAS BEING FUeLED WHILE PieRSIDE AT INDIAN SPRINGS MARINA. AFTER FUeLING THE VENTS WERE NOT USED. THE VESSEL OPERATOR ATTEMPED TO START THE ENGINES SEVERAL TIMES UNSUCCESSFULLY. A LARGE EXPLOSION EMINATING FROM THE ENGINE COMPARTMENT EJECTED BOTH OCCUPANTS OF THE VESSEL. ONLY ONE OCCUPANT SUSTAINED MINOR INJURIES AND WAS TREATED AT A NEARBY HOSPITAL.