Europa-List: 914 rough running

[Paul McAllister <paul.mcallister@qia.net>]

Hi all,

I am looking for a few clues to diagnose this problem..  The engine now has 70
hours on it and it has started running a little rough in the 3500 rpm range. 
It idles fine, starts easily and cruises okay at 5000 rpm.  Rear EHT seem to be
at 1450 in cruise and cylinder head temps in cruise come in about 180.  Spark
plugs look gray with the exception of #2 cylinder where they are noticeably
darker.

Any clues on where to start would be appreciated.

Thanks,  Paul