What was found
ENGINE STALLED WHILE AIRCRAFT WAS ON FINAL APPROACH. DURING TEST RUN, ENGINE PERFORMED NORMALLY DURING RUN UP CHECK, IDLE CHECK AND MIXTURE CHECK AT 1000 RPM. HOWEVER, WHEN THE ENGINE LT AT IDLE (650 RPM) THE ENGINE WOULD BEGIN TO RUN RICH, LOPE AND QUIT RUNNING AFTER ABOUT 1 TO 2 MINUTES. THE CARBURETOR WAS REMOVED AND INSPECTED. ONE HALF OF THE FLOAT, WHICH IS MADE OF HOLLOW PLASTIC, WAS FILLED WITH FUEL.