SECTION
IV
NORMAL PROCEDURES
MOONEY
MODEL
M20J
When cruising at 75
%
power or less, lean the mixture after cruise power is
established in accordance with one of the following methods:
A.Leaning using exhaust gas temperature gauge (EGT) (if installed).
1.
Lean the mixture exhaust gas temperature peaks on the
EGT indicator.
ECONOMY CRUISE
-
Enrich mixture (push mixture control
forward) until the EGT indicator drops
14' C
(25 degrees F.) below peak.
BEST POWER MIXTURE
-
Enrich mixture until
EGT
indicator
drops 55
'
C(lOoO
F.)
below peak.
----------
/
NOTE
I
----------
Compared to Economy Cruise, Best Power mixture will result
in an increase in fuel flow and
a
reduction in rang@.
2. Changes in altitude and power settings require the peak
EGT to be rechecked and the mixture re-set.
B.
Leaning without exhaust gas temperature gauge (EGT).
1.
Slowly move mixture control lever aft from "FULL RICH"
position toward "LEAN" position.
2.
Continue leaning until slight loss of power is noted
(loss of power may or may not be accompanied by roughness).
3.
Enrich until engine runs smoothly and power is regained.
When increasing power always return mixture
to
full rich, then increase RPM
before increasing manifold pressure; when decreasing power decrease
manifold pressure before reducing
RPM.Always stay within the established
operating limits, and always operate the controls slowly and smoothly.
DESCENT
Mixture
...
LEAN to 14'
C
rich of peak
EGT
as
. .
,
.
.
required for smooth engine operation
Power
......
As Required to keep CHT in
.........
Green Arc (300'
F
minimum),
A
NNNNNNNN
b
"
CAUTION
"
(
*-
8d&t3f)
NNNNNNNN
Avoid continuous operation between
1500
and
t950
WPM
with
power settings below
15"
Hg. manifold pressure.
REV. B 6-12-87
4-1
4 ISSUED 6-2-86
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