RedactedNarrative: The operator of the vessel advised they were traveling up the St. Marks River near marker 44 when the engine started to stall and then a small explosion happened inside the engine compartment. They used the vessels flame arresting system which put out the fire at first, then it reignited. They used the fire extinguisher they had on the vessel and two other fire extinguishers from Good Samaritan vessels. Again the fire went out and then reignited at that point they got off of the vessel onto the Good Samaritan vessels. Shortly after Officers arrived on scene.