J.P. Instruments EDM 930 Primary Pilots Guide User Manual
Page 12

For Your Safe Flight
Page 7
the correct value for EGT difference rich of peak operation at 75%
and 65%
7. You can also see what the peak EGT was by holding the
PEAK
button.
8. Tap
STEP
to exit the Lean Find Mode.
Section 2 - Interpreting Data
Operation for each Phase of Flight
(worth adding to your run-up checklist)
Engine
Run-Up
Suggested setup:
Set engine to run-up RPM
Normalize view:
Manual mode
Verify:
uniform rise of about 50°F in all EGTs in single
magneto operation.
uniform rise of EGTs with application of the mixture
control
.
Be alert for:
unusually low voltage (less than nominal battery
voltage)
cold OIL and normal oil pressure
abnormally high CHT
large drop in EGT on one cylinder in single magneto
operation—may be fouled spark plug.