For Your Safe Flight ............................................. Page 29
Rich of Peak leaning is as simple as:
A. Pre-lean your mixture.
B. Tap the LF button (verify ROP appears).
C. Lean mixture until LEANEST flashes (peak found).
D. Enrichen to the desired value ‘Rich Of Peak’.
Establish cruise at 65
to 75% power.
Pre-lean the mixture to
50°F estimated rich of
peak on any EGT:
_________°F.
* See ‘Pre-leaning’ page 31.
Start Lean Find (if LOP appears hold
STEP & LF until ROP appears)
Lean the mixture at
approx. 10°/second
without pausing.
Flashing cylinder I.D. box identifies that
EGT increased at least 15°F. EDM is
now looking for first EGT to peak.
Stop leaning when
a column begins
flashing. You will see
LEANEST for one
second, followed by:
Flashing cylinder I.D. box AND its
column indicates leanest cylinder. Due
to thermal inertia this will usually be
about -15°F down the lean side of peak.
If you hold PEAK, the
values of EGT and FF
when peak was found
are displayed.
Captured peak EGT value and peak FF
are displayed.
If you tap PEAK, the
difference from peak
EGT is shown. Tap
again to return to the
peaked EGT value.
A useful mode for setting mixture the
desired degrees rich of peak - no math
required! NOTE: Unit remembers view
last used.
Slowly enrich the
mixture noting that
EGT is returning to
peak. Stop enriching at
the desired EGT.
‘Peak’: best Econ.
‘ROP’ target: best
power.
EGT 1560
FF 12.9
EGT 1460
FF 13.6
(100º RICH OF
PEAK)
Rich of Peak target
leaner
richer
‘FF’
EGT
1560
Peak
-100
1460
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