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Some time back I had identical symptoms. In my case the initial onset was attributed to carb ice. The conditions were ideal for Ice. Like you, pulling the heat didn't have the expected results. It didn't occur again until I was over mountainous terrain in Northern California With my brother aboard. This time the engine definitely lost power and stumbled. It was a hot Summer day, so carb ice certainly wasn't the problem. It turned out that the electric transfer pump that is installed on the O-200 conversion had corrosion internally. The pump while still operating had ground the metallic corrosion particles into flour like powder which got past the gascolator and fine wire screen in the carburator. The goop then lodged in the well in the bowl bottom where the mixture control mechanism is. The metallic goop like contaminant did not flush out when the drain plug was pulled. Good luck. Cheers: Paul NC2273H ========================================================================== ==== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers/
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