What was found
RECEIVED CARBURETOR FROM CUSTOMER WITH THE FOLLOWING SQUAWK: AIRCRAFT WILL NOT IDLE, CANNOT SHUT DOWN WITH FUEL MIXTURE. SEEMS TO RUN AT HIGH RPM. WHEN SHUT OFF WITH SWITCH, FUEL RUNS OUT OF CARBURETOR. 6.0 HOURS SINCE INSTALLED ON AIRCRAFT. TESTED CARBURETOR FOR FLOAT VALVE LEAKAGE, CARBURETOR OVERFLOWED. DISASSEMBLY REVEALED COTTER PIN MISSING FROM FLOATSHAFT, ALLOWING SHAFT TO SLIDE OUT OF BRACKET.