Garmin GI 275 Pilot's Manual page 86

Engine Indication System
• A white saddle indicates the maximum temperature value recorded for the sensor. In cases
where the system waits for the last engine cylinder to peak, white saddles indicate the
maximum temperature of all other peaked cylinders.
• After three seconds, the 'First Peak' annunciation is replaced by a field indicating the first
peak cylinder, the peak temperature, and the difference between the first peak and the last
peak.
• Once the last cylinder has peaked, the temperature will be indicated above the corresponding
cylinder. The 'Last Peak' annunciation is displayed at the bottom of the page, and information
about the peak temperature is displayed below the graph.
• The difference between the last peak and the current EGT temperature will be displayed for
leaning Rich of Peak (ROP).
Peak Temperature
Peak cylinder and
temperature
Enabling/Disabling Lean Assist Mode:
Touch the LEAN Button on the 'EGT' Page to enable/disable. Lean Assist Mode is
enabled when the annunciator square is green.
Or:
64
Lean Mode
Enabled
First Peak
Annunciation
Lean Assist Functions
Garmin GI 275 Pilot's Guide
Saddle
Degrees difference between
EGT and peak temperature
190-02246-01 Rev. A