It's a suprisingly common fault that, I am sure, has resutled in engines being scrapped. It is an infuriating problem: the engine starts perfectly; idles very well, so you taxi out to the strip, open the throttle and it dies. Or you get in the air, open up from low to mid throttle and - flameout. That happens a few times and the model is at risk of getting the big boot.

Often just changing the prop - and hence the vibration period - does the job. I had an engine that would only run on a 12 x 6 wooden prop - I wanterd to use a low pitch wideblade but the engine kept cutting on that - it was great on the wood prop.

Of course, the answer is to isolate the tank completely from the fuselage - difficult to do with the trend of modern ARTF manufacturers who cut a hole in the front bulkhead that exactly matches the tank neck.