RedactedNarrative: OPERATOR ADVISED SHE AND HER PASSENGER LEFT HAVASU PALMS AND HEADED SOUTH ON THE LAKE.  THEY HEARD A "HISSING" SOUND COMING FROM THE ENGINE AREA SHORTLY AFTER THEY STARTED.  THEY LOOKED BACK AT THE ENGINE AREA AND IT IGNITED IN FLAMES.  THE OCCUPANTS ABANDONED INTO THE WATER AND WERE PICKED UP BY NEARBY BOATERS.  THE FIRE WAS PUT OUT BY A PAIR OF PWC''S IN THE AREA.  VESSELL WAS ON SHORE AT HAVASU PALMS UPON MY ARRIVAL