I have a problem with burning out glow plugs on a O.S. .91 FX and am hoping someone can give me some advice. I have been using Fox's "miracle Plug" and am getting only one flight per plug! I run 15% 2 stroke fuel (Omega) and a 1.5 volt glow driver.

The engine wants a rich mixture and will overheat very quickly if too lean. Even holding the model vertical with no loss of RPM can result in a lean run if not careful. I can see the stream of exhaust in a clear blue sky, and I know it's ok then. Does anyone have a suggestion as to cause, a better type of glow plug for this engine, or other suggestions? I would appreciate any help.

Fred Lomax (W4RCF) [:@]