Just a thought.
You've had a fire, you aren't being paid to fly - you are paying to fly, there's a maintainer there next to the aircraft.
Just what reason is there to actually fly until the maintainer has check the carb and made a tech-log entry stating that he considers the aircraft fit for flight? Damned if I can think of one.
It's a matter of doubt. If there is ANY doubt about the fitness of the aircraft to be flown, get it checked. The carb is PROBABLY okay, but probably isn't definitely!
G