Garmin G3X Installation Manual page 116

8.2.6.1 Lycoming and Continental Engine Installation
General Installation Guidance
Electronic Ignition - Refer to vendor documentation for proper installation.
UMA 1A3C-2
1. Remove the cap from the tachometer drive output (Figure 8-13) from the back of the engine.
2. Insert adapter tang into slotted keyway in sensor drive port.
3. Screw tach sensor onto threaded driver port, ensuring that the adapter tang on the sensor aligns
with the slotted keyway in the drive port (Figure 8-14).
4. Connect the supplied connector to the appropriate inputs on the GSU 73 as referenced in the G3X
interconnects in Appendix H. Secure the connector and wire assembly to an appropriate location
in the engine compartment to provide strain relief.
The body of the sensor unit can be offset slightly to eliminate potential interference with
other engine accessories. If the interference cannot be alleviated by offsetting the sensor
directly, the builder may either install a magnetic pickup sensor or use a short tachometer
drive extension cable to remote mount the sending unit to the engine mount (or other
suitable location).
Figure 8-13. Tachometer Drive Output
Page 8-12
Revision E
NOTE
Figure 8-14. Installed Tachometer Sensor
G3X Installation Manual – Engine Sensor Installation and Configuration
190-01115-01