"Trent Moorehead" wrote in message ...
"Roger Long" wrote in message
...
I can't remember where I "learned" it but I always thought 1800 RPM was
the
limit for ground running leaned to clear plugs.

snip

I was taught to throttle up to 2000, lean to peak, and run this way for 60
seconds. I've had to do this many times and it has always worked.

Now, I was taught in a C-150 and I have transferred that knowledge to the
C-172, so I may be doing something wrong now. I will check the POH when I
get a chance.....

-Trent
PP-ASEL

60 seconds is way too long. That engine gets cooking hot by that
time. Try actually timing it sometime and see just how long it is.

Dan