RedactedNarrative: On July 2, 2019 I was notified of a boat fire at Lakeside Campground.  Upon my arrival, I observed a vessel bearing Ohio registration 5968ES engulfed in flames. According to the operator, she was inside the vessel as her husband launched the vessel into the water. The operator stated the engine started as normal. Once the vessel was launched off the trailer, the operator engaged the throttle to the forward position when she noticed the engine was misfiring and not running correctly, According to the operator''s statement, after she accelerated the throttle, the engine compartment exploded throwing her almost into the cuddy cabin of the vessel. The operator did sustain injury to the left side of her body due to the explosion.