display instead of the word SET.) The flashing cylinder will be locked —
or set—into the digital display during the remainder of the LeanFind
procedure to allow you to set the final mixture. The peak EGT value is
remembered by the EDM-760/790 and will be displayed as long as you
hold the LF button.
You may now enrichen the mixture to operate at peak or continue
enriching to 100° rich of peak, or a value of your choice, consistent with
the procedures defined in your aircraft engine manual. If you tap the LF
button, the digital display will toggle between displaying the peak EGT or
the number of degrees below peak.
If you lean too much, the EGT will drop and the engine will be operating
lean of peak.
I560 I452
STEP LF
_
%
MAX
_
J
P
I
1 2 3 4 5 6 T
° F L R P
SET
EGT
EDM-760
Leaning RICH of Peak
PEAK
EGT
1 2 3 4 5 6 T
300
400
500
CHT
column of
LEANEST cylinder
flashes
EGT of the
LEANEST cylinder
displayed with the
word "SET"
dot indicates
LEANEST cylinder
and flashes
"PEAK EGT"
displayed for
two seconds
when peak is
found
Lean of Peak Leaning with GAMI injectors
To use the “lean of peak” method, tap LF and then immediately hold both
STEP and LF until you see LEAN L. Once you begin leaning (flashing
dot) you cannot change leaning methods. You may toggle back to LEAN
R by holding both buttons again.
Page 20 Engine Data Management
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