VESSEL 1 ALONG WITH PASSENGER LEFT THE FAIRFIELD RAMP AFTER WORKING ON THE ENGINE, STATED HAD JUST REPLACED THE FUEL FILTER.  WHILE TRAVELING NW OF THE RAMP THE ENGINE STALLED AND AFTER REPEATED ATTEMPTS TO GET STARTED occupant YELLED OUT THE MOTOR WAS ON FIRE.  THEY ATTEMPTED TO EXTINGUISH WITH FIRE EXTINGUISHER BUT WAS TOO ENGULFED.  THEY THEN GRABBED PERSONAL FLOTATION DEVICES AND WAIVED DOWN A PASSERBY BOAT WHO CAME AND PICKED THEM UP.  THEY USED A CELL PHONE TO CALL 911.  WHEN I ARRIVED I LOCATED subjects IN ANOTHER BOAT AND WITNESSED THEIR HOUSEBOAT SMOLDERING WITH THE ROOF ALREADY COLLAPSING.  I TRANSPORTED BOTH SUBJECTS TO THE FAIRFIELD RAMP WHERE THEY WERE OFFERED MEDICAL TREATMENT AND DENIED ANY.  I THEN RECEIVED STATEMENTS FROM BOTH WHICH WERE CONSISTENT AS STATED ABOVE.
AT 1518PM THE HOUSEBOAT SUNK COMPLETELY.