J.P. Instruments EDM 760 Pilots Guide - Manual (Page 29)

Display Symptom Probable
Cause
Recommended
Action
50%
EGT and
CHT not
uniform Dirty fuel
injectors
or
fouled plugs.
Check injectors
and plugs. Non-
uniformity is
normal for
carbureted engines
50%
Decrease
in EGT for
all cylinders Decrease in
airflow into the
induction system.
Carb or induction
ice.
Engine units set
to Celsius Check for change
in manifold
pressure.
Set alarm limits to
Celsius degrees
50%
Slow rise in
EGT. Low
CHT Burned exhaust
valve. CHT is low
due to low power
output. Have compression
checked.
50%
High CHT
on
cylinders
on one side
of engine Obstruction
under cowling. Check for improper
installed baffling,
cowl flap
misalignment or
bird nests.
50%
EGT on
one
cylinder
jumps up
and down
100° Spark plug
fouling at higher
temperatures. Check spark plug.
For Your Safe Flight Page 25