RedactedNarrative: OPERATOR OF UNIT 1 BACKED VESSEL INTO ICW AT PRIVATE RAMP.  OPERATOR TURNED ON BLOWERS FOR APPROXIMATELY 30 SECONDS AND TURNED ON IGNITION.  THERE WAS AN EXPLOSION IN THE ENGINE COMPARTMENT.  OPERATOR ATTEMPTED TO EXTINGUISH THE FIRE BUT WAS UNSUCCESSFUL.  OPERATOR GOT OFF VESSEL AND UNHOOKED IT FROM THE TRAILER.  OPERATOR FINISHED BACKING THE BOAT INTO THE WATER TO AVOID CATCHING HIS TRUCK AND ADJACENT DOCK ON FIRE.  BOAT WAS TOWED TO SHORE TO MEET FIRE DEPARTMENT.