RedactedNarrative: On June 28,2018, the operator had been making repairs and was testing Vessel 1 on Lake Guntersville.  Vessel1  was at cruising speed and the operator  stated that he smelled gasoline.  The operator brought Vessel 1 to a stop and opened the cowling. Flames and smoke consumed the engine compartment of  Vessel 1.   The operator donned  a PFD and jumped into the water.  Vessel 1 became fully involved and sank near the edge of the river channel.  Vessel 1 operator was recovered from the water by a passing boater.  Guntersville City Police Dept, Guntersville City Fire Dept and Guntersville Recue Squad all responded to the the scene.  The Operator of Vessel 1 was taken to Alred''s Marina to meet with Marine Patrol Troopers.