RedactedNarrative: On June 14, 2014, at approximately 2:30PM, Vessel LA8127GA, was being operated by operator. the vessel is described as a 16 ft. mud boat powered by a 35 HP air cool (remote steering). Operator, wearing a type 5 PFD, was traveling in ponds located on his duck lease near Richard Canal. Operator's intentions were to spray the area for water lilies. Traveling in the ponds Operator encountered thick water lilies. Operator traveled across a section of water lilies which quickly decelerated the vessel. Operator crossed the section of water lilies and again encountered another patch of lilies. As Operator attempted to cross the second patch, he noticed that the floor of the vessel contained gas from a 5 gallon tank that was located in the rear of the vessel. The gas had reached the motor section of the vessel and ignited. Operator jumped into the water. the vessel was engulfed in flames and later sank. Operator stayed near the vessel and was located by friends at approximately 6:30 pm. Operator was transported to Bayou Black Marina. From Bayou Black Marina, Operator was then transported to Thibodaux Medical by Acadian Ambulance. Operator received 3rd degree burns to his right arm/hand and both legs below his belt line. Contributing factors to the incident is deceleration in marsh area/fuel tank not secured and spilled fuel The type of incidents is fire or explosion, fuel . and sinking. Alcohol was not a contributing factor to the incident.