As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
What was found
(CAN) FLOAT VALVE AND SEAT ASSEMBLY FOUND TO BE STICKING IN THE OPEN POSITION CAUSING A HIGH FUEL LEVEL IN THE FLOAT CHAMBER. THEREFORE GIVING A RICH MIXTURE IN THE IDLE RANGE CAUSING ENGINE TO STALL IN IDLE RANGE AND ROLL-OUT ON RUNWAY. TO CORRECT THIS CONDITION, FLOAT VALVE POLISHED ND REASSEMBLED AND HAS BEEN RUNNING GOOD EVER SINCE.