As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
INSTALLED SUPPLIED O/H CARBURETOR ON 7-19-2010. AFTER 80 HOUR OF TIME ON REPLACEMENT CARBURETOR, ENGINE BECAME HARD STARTING AND WAS UNABLE TO ACHEIVE PROPER LEANING AT ANY RPM. ALSO, NOTICED A POWER DROP OR STUMBLE, WHEN REDUCING POWER FROM FULL THROTTLE BACK TO CRUISE. REMOVED AND FOUND LEAK AROUND TOP OF VENTURI. REPLACED WITH A NEW CARBURETOR SUPPLIED BY MFG.