190-01115-01
G3X/G3X Touch Installation Manual - Engine/Airframe Sensor Installation
Rev. AC
Page 23-17
Perform the following steps and refer to
, and
sensor.
1. EGT probes (Figure 23-5) should optimally be mounted a minimum 2 inches and a maximum of 4
inches from the cylinder exhaust port flange on a flat portion of the exhaust tube. For highly
supercharged engines, the EGT probe should optimally be mounted a minimum 5 inches and a
maximum of 7 inches from the cylinder exhaust port flange 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 (
). 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
for an example of an installed EGT probe.
Figure 23-5 EGT Package
