As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) SEVERE CARBURETOR FLOODING ON GROUND RUN-UP, HARD STARTING AND FOULING OF SPARK PLUGS. FUEL WAS SEEN LEAKING FROM THE CARBURETOR. ENGINE FAILED TO SHUTDOWN USING MIXTURE CONTROL AND SEVERE BACKFIRING OCCURRED. THE CARBURETOR WAS REPLACED AND THE PROBLEM WAS ELIMINATED.