RedactedNarrative: On 07/06/2016 I responded to Indian River Marina in Jacksboro, TN in reference to a reported boat fire.  Upon arrival I spoke with the owner of the vessel, and her adult son who was the operator at the time of the fire.  Both individuals stated that they were drifting in a cove on Norris Lake between Indian River Marina and Whitman Hollow Marina at the time of the fire.  Operator stated that throughout the day the engine had been idling rough and had been difficult to start. He further stated that he had noticed gasoline leaking from the engine area earlier in the day.  He stated that upon attempting to start the engine to leave the cove there was a small explosion that blew the cowl off of the engine and the engine ignited.  Operator retrieved the fire extinguisher on board the vessel and was able to extinguish the fire.  A passing boater offered assistance and towed the disabled vessel to Indian River Marina. There were no injuries associated with this incident.