As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
MIXTURE CONTROL BINDING, CONTROL ARM VERY STIFF TO OPERATE. MIXTURE CONTROL BUSHING STUCK TO MIXTURE SHAFT. BROWN CONTAMINATION FOUND BETWEEN PACKING AND SEAL ON MIXTURE CONTROL SHAFT. CONTAMINATION FOUND IN VENTURI, SERVO BODY AND REGULATOR.