User Guide
Garmin G1000 EIS Pilot’s Guide for Mooney M20M & M20R 190-00447-00 Rev. A 7-4
ENGINE INDICATION SYSTEM
7.2 LEAN
The Lean Page provides information and a user in-
terface to perform engine leaning. Located beneath the
tachometer is a color-coded horizontal bar indicator for
fuel quantity and a numeric readout for fuel flow. Below
these indicators are bar graphs and numeric readouts for
exhaust gas temperature (EGT) – for normally aspirated
aircraft and cylinder head temperature (CHT) in degrees
Fahrenheit. By default, the numeric readouts of EGT
and CHT are associated with the hottest cylinder and are
graphically indicated in cyan (light blue). Color coding
for the EGT and CHT bar graphs is listed below:
• Cyan – Selected cylinder (EGT and CHT)
• White – Normal (EGT and CHT)
• Yellow – Caution (CHT only)
• Red – Warning (CHT only)
The temperature deviation from peak in degrees Fahr-
enheit for normally aspirated aircraft is displayed beneath
the EGT readout. Located to the lower right of the EIS
strip are the flap and elevator trim position indicators.
The rudder trim is not shown on this page.
Cylinder Select
The CYL SLCT softkey can be utilized to obtain infor-
mation about a particular cylinder.
The CYL SLCT softkey becomes disabled when a par-
ticular cylinder turns yellow (Caution) or red (Warning),
until the temperature decreases and returns to normal,
which is indicated by white on the bar graph. It is also
disabled when the ASSIST softkey is pressed.
The CYL SLCT and ASSIST softkeys are available by
pressing the
LEAN softkey.
To monitor the desired cylinder(s):
1. From the Lean Page, press the
CYL SLCT
softkey
to cycle through each cylinder and view the EGT
and CHT.
Lean Assist
The ASSIST softkey can be utilized to assist in the
leaning process.
Normally Aspirated
When a cylinder peaks, its peak is represented by a
hollow bar on the EGT bar graph. The EGT readout for
the peaked cylinder, indicated in cyan (light blue), appears
directly beneath the bar graph. The system automatically
switches to the first peak obtained and displays the tem
-
perature deviation from peak in degrees Fahrenheit below
the EGT readout.
NOTE: The Lean Assist function is not available
for the turbocharged Mooney models.
NOTE: The pilot should follow the engine man-
ufacturer’s recommended leaning procedures in
the Aircraft Flight Manual (AFM).
The ASSIST softkey is available by pressing the LEAN
softkey.
To select the Assist function:
1. From the Lean Page, press the
ASSIST
softkey
to acquire EGT peak.
NOTE: Pilots should refer to the Aircraft Flight
Manual (AFM) for limitations.