RedactedNarrative: On August 20th at approximately 1505 hours Vessel #1 (V#1) was on Thunderbird Lake at Fisherman's Point Boat dock .  When the operator advanced the accelerator and the occupants heard a pop and (V#1) caught fire.  The owner of Vessel #1 stated that he went and fueled his vessel prior the launching, he also stated that  he ran the ventilation fan as well.  The injured passenger was transported to the local burn center and was admitted for pain management. Operator failed to run blower long enough and failed to sufficiently vent fumes.;