After asking a few questions and trying several good suggestions, I still have a "miss" in my engine. It is a Revmaster 2180 with POSA w/o mixture, Bendix D-2000 mags. Previously thought that it was a carb design issue but need to look elsewhere. On initial start up the plane starts and idles perfectly. Today we taxied to the other end of the field (4600 ft) and returned. Engine didn't miss until we got back about half way. It is just a "bump" in the engine. It doesn't stumble as in a fuel problem in my opinion. I can't make it do it. Sometimes it just quits altogether and restarts just fine. When I bought the plane the previous owner said that the stumble was a trait of the POSA and wasn't an issue at flying rpm. I'm just not so sure. Could there be an ignition issue that would cause this? I have not taxied on just one mag to single out that, but during a mag check they seem to function fine. It does seem to start after warming up. Oil temps of about 150. Checked the fuel line for a hot soak condition and was slightly warm. Hell, the exhaust pipes were barely hot!! Any more suggestions?
Scared to fly Regards, Terry Teer Ackerman, MS
