RedactedNarrative: Operator launched his boat for the first time this season and when was about 200 yards from the ramp heard a loud bang.  He though he had hit a rock but when he looked back he noticed that the engine hatch was open and the cessions had blown off.  He also noticed a fire in the engine bay which he was able to initially put out with his on board fire extinguisher.  The fire flared back up a second time and a nearby good sam gave him another extinguisher and he was able to put the fire out again.  He was then towed back to the ramp.  No injuries were reported and there were no other occupants onboard the boat at the time of the incident.