RedactedNarrative: V1, a 21-foot Tige inboard motor boat exploded on the Coralville Reservoir at the Sugar Bottom Boat Ramp.
  Two children sustained first and second degree burns as a result of the
  explosion.
  
  V1, had just been backed  into the water at Sugar Bottom Boat Ramp. Operator unhooked the boat from the trailer while wife stayed with the truck. He then boarded the boat and sat in the driver’s seat. Children were seated on the passenger seat to the left of the driver’s console inside the boat. He said that he ran the blower for approximately 30 seconds before turning the key to start the boat’s engine. As soon as he turned the key, there was an explosion inside the motor housing at the center of the boat. The explosion blew a large tube (used for towing) off the back of the boat. He ordered the kids to jump into the water. After the kids were off the boat, he pushed the boat into the water away from the dock. The boat exploded again, burst into flames and became fully engulfed.
  
  The conclusion is that, this boat explosion occurred due to insufficient venting of fuel vapors inside the
  boat. The boat manufacturer recommends that the blower be utilized for at least four minutes prior to
  starting the engine to ensure all fuel vapors are cleared from the vessel. The combination of increased
  pressure due to hot weather and insufficient use of the blower to clear vapors caused the fumes to ignite
  when the ignition key was turned.