I was wondering, does going to large diameter props with low pitch (3D props) cause an engine to die when I throttle down to idle on a steep down line? I changed from an APC 12-6 to a 13-4W and 12.25-3.75 on my Irvine 53 and ever since the engine quits when I'm flying. It seems to be more on down lines while throttling down to idle. I could be wrong, the problem might be something else but I wonder if braking can actually stop the engine at idle.