RedactedNarrative: The operator of the vessel and the passenger did not suffer any injuries from the vessel fire.  Operator was operating his 1983 Glastron ski boat, Georgia Registration number GA6120GL, with an inboard/outboard motor.  Operator said he and Occupant were just going to take the vessel out for a ride, because it had not been used for several months.  Operator said he had trouble starting the vessel’s engine and the engine was running rough as he idled through the no wake zone.  Operator said just outside of the idle speed zone, he gunned the vessel’s engine and heard a loud explosion in the engine compartment.  Operator said he used the vessel’s fire extinguisher, but was unable to put out the fire.  An off-duty Crisp County Sheriff’s Deputy was boating nearby and went over to assist Operator.  Operator and Occupant got into the deputy’s vessel and they towed the burning vessel closer to shore so the fire department could extinguish the vessel.  The vessel was located approximately 20 feet from shoreline and it was fully submerged. WE attempted to tow the vessel to the boat ramp, but were unsuccessful due to the damage the vessel sustained from the fire.  The next day I took photos of the vessel after Operator recovered the vessel from the lake.