RedactedNarrative: After fueling the watercraft, the operator had the blower on for a few minutes. As soon as the operator turned the key for the port engine, a fireball erupted from the engine bay, burning the two people who were sitting on top of the engine covers. They were both transported to the hospital with 2nd degree burns. There was damage to the engine bay. Life jackets were not being worn and alcohol was not a factor.