Manual

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