Garmin G3X Installation Manual page 110

8.2.3 EGT (Exhaust Gas Temperature)
Sensor Description – Type K grounded thermocouple probe with integrated clamp for mounting in an
exhaust pipe.
If ungrounded thermocouples are used, the low side must be taken to a GSU 73 ground
pin.
8.2.3.1 Lycoming, Continental, Jabiru, and Rotax Engine Installation
General Installation Guidance – To maintain G3X Engine Indicating System (EIS) measurement
accuracy, thermocouple (TC) wire must be connected directly to the inputs of the GSU 73. If the supplied
sensor wires are not long enough to connect directly to the GSU 73, then Type K TC extension wire must
be used. To minimize risk of breakage, it is recommended that a high quality stranded (as opposed to
solid) thermocouple wire be used. TT-K-22S Type K thermocouple wire from Omega Engineering is one
such example of appropriate wire.
When using Alcor Type K probes, refer to Alcor EGT Installation Instructions (P/N 59180) for complete
installation details. Engine manufacturer's guidance should be consulted and followed for proper location
of EGT probes.
Page 8-6
Revision E
Figure 8-4. One Piece CHT Probe Installed
NOTE
G3X Installation Manual – Engine Sensor Installation and Configuration
190-01115-01