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Date: Wed, 16 Jan 2008 09:49:40 -0500
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From: "Colyn Case on earthlink" <colyncase@earthlink.net>
References: <list-2646845@logan.com>
Subject: Re: [LML] Re: RPM drop
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my cessna 172rg has a o-360 in it which exhibits the same behavior described 
in the original post.
my experience has been
- of course keep it lean on the ground
- keep it lean on final approach and moreso after landing.   (this is the 
biggest factor after ground leaning but it means you have to change mixture 
on a go-around)
- iridium plugs didn't help
- when it's a problem and I dare take off, it's usually cleared by the 
departure end of the runway
- when it's a problem and I don't dare take off, it takes 2300 rpm for about 
45 secs to change anything.
- you can tell when the problem is gone because the egt will come down in 
line with the other cylinders.

Colyn