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Folks, I have an Alon A2, C-90, with two props, one 48" pitch and the other 52". It doesn't make the static runup RPM minimums with either one, for instance the 48" prop should be 2225 to 2325 rpm, I averaged out to 2162 rpm. Likewise the 52" prop falls short 100 rpm or more. Three years ago when I checked the tachometer, it read a little slow--maybe 10-20 rpm at speed, that is it would indicate 2300 and the electronically measured rpm would be 2310 or so. Assuming that's still true, what would cause the engine to not make minimum rpm? Where should I start troubleshooting? Ralph Finch ========================================================================== ==== To leave this forum go to: http://ercoupers.com/lists.htm Search the archives on http://escribe.com/aviation/coupers-tech/
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