Beechcraft Bonanza E33 - Leaning Using the Exhaust Gas Temperature

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BEECHCRAFT
Debonair C33
BonanzaE33and F33
Section IV
NormalProcedures
LEANIN G USI NG THE EXHAUST GAS
TEMPERATURE INDICATOR (EGT)
A thermocouple-type exhaust gas temperature (EGT) probe
is mounted in the exhaust system. This probe is connected
to an indicator on the
instrument panel. The indicator is
calibrated in degrees Fahrenheit. Use EGT system to lean
the fueVair mixture when cruising at 75% power or less in
the following manner:
1. Lean the mixture and note the point on the indicator
that the temperature peaks and starts to fall.
a. CRUISE (LEAN) MIXTURE - lncreases the mix-
ture until the EGT shows a drop of 25°F below
peak on the rich side of peak.
b. BEST POWER MIXTURE - lncrease the mixture
until the EGT shows a drop of 100°F below peak
on the rich side of peak.
CAUTION
Do not continue to lean mixture beyond that
necessary to establish peak temperature.
2. Continuous operation is recommended
at 25°F or
more below peak EGT on'ly on the rich side of peak.
3. Changes in altitude and power settings require the
peak
EGT to be rechecked and the mixture raset.
August 1982
4-13