RedactedNarrative: Operator was fishing when he decided to move to a different location.  He attempted to start the boat but smelled the odor of gas.  He then ran the blower for a few minutes but the fumes still remained.  He opened the engine cover in an attempt to dissipate the fumes.  He then started the engine and it immediately burst into flames.  He threw all children overboard and jumped in himself.  Everyone was able to swim to shore.  All the children were wearing PFD.