Garmin G3X Installation Manual page 111

Perform the following steps and refer to Figures 8-5, 8-6, and 8-7 to install an EGT sensor.
1. EGT probes (Figure 8-5) should optimally be mounted between 2 and 4 inches from the
cylinder head on a flat portion of the exhaust tube. To maintain consistent readings
across cylinders, all probes should be mounted an equal distance from the exhaust
flanges.
2. Carefully center punch the probe hole locations so that the external portion of the probe
does not interfere with any other parts of the engine or cowling (Figure 8-6). It may be
desirable to angle the probes towards the rear of the engine to allow efficient wire routing
back to the cockpit. If angling the probes towards the rear of the engine, take care to
ensure that sufficient clearance is provided to service the spark plugs.
3. Carefully insert probe into the exhaust pipe and tighten the clamp snugly with
screwdriver (35 in-lbs torque max.).
4. Connect the EGT probes to the thermocouple extension wire. Provide strain relief for the
assembly by either fastening the probe leads to the valve covers with a clamp, or by tying
the extension wire to the intake tubes or other suitable location. A finger-sized loop
should be provided to allow appropriate strain relief, and care should be taken to ensure
that no chafing of the wires occurs. See Figure 8-7 for an example of an installed EGT
probe.
G3X Installation Manual – Engine Sensor Installation and Configuration
190-01115-01
Figure 8-5. EGT Package
Page 8-7
Revision E