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From: "Marvin Kaye" <marv@lancaironline.net>
Subject: Re: UNEXPLAINED VIBRATION-LNC2
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Date: Sun, 15 Jan 2006 23:53:43 -0500
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Posted for "Gerard O Connell" <goconnell@dodo.com.au>:

  
   Is your engine counterweighted? Is there any rpm limitations on your prop
engine combination? What is the configuration of your air intake system and
does the descent procedure change the relative air flow around the intake in
an unusual manner? Are you on mags or Electronic Ignition? If mags are they in
good condition ie no arching evidence inside the caps, plugs normally dry or
wet, stuff like that? Unusual bends in fuel line going into the carburator?
These are some ideas to explore. Bob Smiley N94RJ