As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
THE PILOT OBSERVED FUEL DRAINING FROM THE CARBURETOR WHILE REFUELING. THE CARBURETOR WAS REMOVED AND DISASSEMBLED. THE FLOAT WAS FOUND TO HAVE A SMALL QUANTITY OF FUEL IN IT WHICH CAUSED THE NEEDLE TO REMAIN UNSEATED. A NEW FLOAT WAS INSTALLED AND THE ENGINE RAN SATISFACTORY.