RedactedNarrative: V1 was cruising up river on the Nebraska side of the river.  Approximately ¼ to ½ miles upriver from the confluence of the Big Sioux and Missouri Rivers.  O1 refused to answer any other questions of this officer.  The rest of this report is a synopsis of the report gathered by the Sioux City Fire Department.
  A fire started in the engine compartment of V1 which caused the subsequent ignition of the boat and engine compartment.  The actual cause of the fire was undetermined due to the severity of the fire.  O1 stated that the engine was recently serviced.  While O1 was piloting the boat the engine was starting to show signs of not running properly.  O1 then heard a “whoosh” noise and looked back and saw heavy fire coming from the engine compartment.  O1 exited V1 to avoid injury.  Nearby boats rescued 01.
  
  Boat catches fire near Sioux City Marina
  4-8-17 - Sioux City, IA
  The 20-foot jet power boat caught fire and was engulfed in flames where the Big Sioux River meets the Missouri River. Sioux City Fire and Rescue officials say one male was on the boat when the fire broke out around 5:00 p.m this evening. Fire officials say the male involved told them the boat was having some engine failure when he heard it backfire and looked behind him, he saw that the boat was on fire, he had to jump to safety. The incident also caused a small grass fire when the boat knocked into some rocks. "He jumped into the river when the boat caught fire and then someone who was out boating picked him up and brought him to shore, he sustained some first degree burns on his arms, hand and part of  his leg," said  Assistant Fire Chief, Sioux City Fire Rescue. The boat had to be towed to shore before fire fighters could put out the flames. It is totally destroyed. Aside from the burns the boater appeared to be fine and was not transported to the hospital, fire officials say he plans to seek treatment on his own.
  http://www.ktiv.com/story/35104288/2017/04/Saturday/boat-catches-fire-near-sioux-city-marina