BEECHCRAFT Bonanza
V35. V35A & V35B thru D-9947
Section IV
Normal Procedures
LEANING USING 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 fuel/air 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 - Increases the mixture
until the EGT shows a drop of 25°F below peak on
the rich side of peak.
b. BEST POWER MIXTURE - Increase 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 only on the rich side of peak.
3. Changes in altitude and power settings require the
peak EGT to be rechecked and the mixture reset.
January 1982
4-13
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