HI HAVE BOUGHT OS 37 FOR MY HELI ITS A CENTURY AIRWOLF . I HAVE RUN 1 GALLON OF 10% DURAGLOW THROUGH IT AND IT RUNS VERY WELL FOR 10 MINS.I THEN COME AND LAND AND LOWER THE THROTTLE AND IT CUTS OUT. I HAVE REPLACED THE GLOWPLUG (ENYA NO3) AND IT STILL HAPPENS. ALL THE CARB SETTINGS ARE STILL AT BOOK SETTINGS. THERE IS PLENTY OF SMOKE BUT ENGINE DOES SEEM VERY HOT. PLUS WHEN I DO MANAGE TO LAND WITH OUT STALLING THE ENGINE MAKES POPPING NOISE.ANY HELP OR SUGGESTIONS WOULD BE GRATFULLY RECEIVED .