190-01115-01
G3X/G3X Touch Installation Manual - Engine/Airframe Sensor Installation
Rev. AC
Page 23-20
23.3.5 Pressure (Fuel, Manifold, Oil, and Coolant)
General Installation Guidance –
The specified pressure transducers provide for two different mounting
options:
Figure 23-11 Pressure Transducer Mounting Block
a) Sensor body secured to the engine mount or firewall via an appropriately sized Adel clamp
(preferred)
OR
b) Mounted to a transducer mounting block located on the firewall. UMA sensor mounting
may require the use of a stainless steel AN911 fitting (union).
NOTE
To minimize the possibility of cracking or breaking of the transducer due to vibration, the
sensor should not be mounted directly to the engine. Mechanical failure of the transducer
could result in loss of engine pressure for the sensed parameter (oil, fuel, manifold,
coolant).
Once a suitable sensor mounting arrangement has been identified, the following installation
procedures should be followed:
1. Mount the sensor using one of the two methods noted above.
2. Refer to the applicable engine manual to identify the appropriate connecting port on the engine for
the parameter being sensed. Once identified, use appropriate aircraft-grade hoses and fittings to
connect the corresponding port on the engine to the sensor. The male threads on Kavlico sensors
are designed to mate with a 1/8” NPT female thread. The female threads on UMA sensors are
designed to mate with a 1/8” NPT male thread.
NOTE
The fuel and oil pressure fittings on the engine port should have a restrictor hole where
appropriate to minimize potential fluid loss in the event of breakage.
NOTE
A restrictor or snubber fitting (not available from Garmin) may be installed to dampen
manifold pressure fluctuations. One example is the PS-8G fitting from Omega
Engineering.
