Just after 6pm Conroe Fire Department and Lake units were dispatched to a marine fire at the Timewise McShell on SH 105 at Lake Point Blvd. Conroe Fire Boat was first on the scene and reported two persons in the water and a boat on fire. THe pair were able to swim to the dock. One female who was in her 50's was critically burned. She was transported to a Burn Center in the Texas Medical Center in Houston. According to the owner of the boat, he told authorities he had just filled up with 80 gallons of fuel at the McShell dock pumps. He had disconnected from the pump and was approximately three-feet from the dock. When he started the boat a flash fire occurred. Investigators are looking at a faulty fire suppression system in the engine compartment and possibly a non-operational blower exhaust motor which vents the engine compartment. Conroe Fire boat crews were able to get the boat back to the docks where Conroe and Lake Conroe Firefighters completed extinguishing the blaze. THe boat, which was taking on water was towed by Tow Boats USA. Montgomery County Precinct 1 Lake Patrol units assisted. Game Wardens with the Texas Department of Parks and Wildlife are lead on the investigation with the Montgomery County Fire Marshal's Office assisting.