RedactedNarrative: According to victim and witness statements, the operator took the boat to the gas dock and Sugar Hollow Marina and had it filled with fuel.  The operator turned on the blower and then started the engine.  After fueling, he took the boat at idle speed to the no wake buoys.  Around this time he put the boat in neutral and the occupants started preparing to go tubing.  While preparing to go tubing there was an explosion and the engine compartment caught on fire.  The occupants then entered the water.  Two pontoon boats then arrived on scene to assist with getting the victims out of the water.  One of the pontoon boats had an OH registration and the other one was a boat owned by Sugar Hollow Marina and was occupied by two marina employees.