RedactedNarrative: The operator was at drift about a 1/2 mile from Bowers beach when he tried to start the motor and it failed. The operator stated that  he took the cover off the motor and gave a few smacks to the carburetor to get it running again. The motor would start and give the boat some propulsion and stall out after a few minutes. That''s when the operator tried giving the carburetor a few more hits. The engine at this time, back fired and sprayed fuel onto the operator setting his right arm and torso on fire. The operator who did not have a life vest on, jumped off the right side of the boat in the water. Once he was in the water he yelled to the other adult on board to get the kids off the boat. Everyone else on board had life vest on at the time of the accident. Once everyone was off the boat they were picked up by a nearby vessel.