As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
CARBURETOR RUNNING OVER RICH. AFTER DISASSEMBLY, FOUND STICKY MATERIAL (PROBABLY FUEL LUBE TM) ON PARTING SURFACE GASKET COVERING ENTIRE GASKET. THIS CARB HAS HAD OTHER WORK DONE SINCE GASKET WAS INSTALLED. SUBMITTER STATED MECHANIC ERROR?