Electronics International TC-1P - Manual (Page 10)

Operating Information
7
CHT's
It is not necessary to continually monitor the EGT’s in order to detect a problem. Most problems worsen
over a period of time and can be easily detected before they become a safety hazard by thoroughly checking
the EGT readings at run-up and once or twice during a flight.
The following is a list of EGT/CHT symptoms and possible problems:
Symptom Possible Problem
One EGT reads abnormally high. The correspond-
ing CHT reads lower than normal.
Burned valve or broken ring, defective plug, plug
wire or mag.
One EGT reads abnormally high. The correspond-
ing CHT reads higher than normal.
Plugged injector, intake leak.
One EGT reads abnormally low. Over-sized injector, restricted exhaust, broken or
leaky exhaust header.
High CHT’s and/or high EGT’s on all cylinders. Excessive leaning with power settings over 75%.
Detonation due to bad fuel. Closed or restricted
cowl flaps. Missing or loose baffling.
Timing problem or defective mag.
Jumpy readings on one channel.
High EGT’s and/or low CHT’s on all channels.
This is not an engine problem. Check all connec-
tions and the probe for proper operation. See
Troubleshooting Section of this manual.
CHT's
1. Maximum CHT Operating Limit (Red Line):
Do not operate your engine above the Maximum Operating Temperature Limit indicated on the front of this
instrument. Operating above CHT Red Line can destroy plugs, burn and warp valves, cause detonation or
preignition (which can destroy engine components), cause extensive wear on bearing surfaces, cause loss of
power, and much more. It is essential to operate your engine within its CHT operating limits. Electronics
International’s CHT instruments give you three mechanisms to detect an over-temperature limit (Red Line)
condition.