Lean Assist Mode (Optional) - Garmin G3X Touch Pilot's Manual

3.2 LEAN ASSIST MODE (OPTIONAL)

NOTE: The pilot should follow the engine manufacturer's recommended
leaning procedures as described in the Pilot's Operating Handbook (POH).
A Lean Button is displayed on the Fuel Tab of the Eng Page when Lean Assist
Mode is enabled and at least one Exhaust Gas Temperature (EGT) or Turbine Inlet
Temperature (TIT) input is configured (refer to the G3X Touch Installation Manual for
more information).
Using Lean Assist Mode:
From the Fuel Tab of the Eng Page, touch Lean. As the mixture is leaned, one
of the cylinders' exhaust temperature will peak. Continuing to lean the mixture
will cause each additional cylinder to peak (if applicable) until the last of the
cylinders peaks. To cancel Lean Assist Mode, touch Lean again.
When the Lean is selected, the Lean Assist Mode waits for a cylinder's EGT to reach
a peak temperature and decrease by at least 7°F. The peak EGT for each cylinder is
displayed as a small grey number above each bar on the graph. To prevent detection
of false peaks, the system waits for a cylinder's EGT to increase by at least 15°F before
detecting a peak. In addition, if the cylinder temperature rises above a previously
detected peak by more than 100°F, the previous peak is considered false.
A cylinder temperature bar graph is displayed if CHT/EGT data is configured on 4
or more cylinders. A readout showing the temperature deviation from peak (DEGT) is
displayed in place of the normal EGT temperature number. The temperature deviation
of the first cylinder to peak is light blue. A light blue hollow triangle appears on the
EGT gauge to represent the peak EGT for that cylinder.
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