Garmin G3X - C.5 Engine Data Message Format

190-01115-01 G3X™/G3X Touch™ Avionics Installation Manual
Rev. AV Page C-4
C.5 Engine Data Message Format
The Engine category contains one message format. The Engine Data message format is transmitted
approximately 5 times per second. Table C-3
explains the Engine Data message format.
Table C-3 Engine Data Message Format
Field Name Offset Width Units Notes Min Max
Escape character 0 1 '='
Sentence ID 1 1 '3'
Sentence version 2 1 Currently '1'
UTC hour 3 2 hours 00 23
UTC minute 5 2 minutes 00 59
UTC second 7 2 seconds 00 59
UTC second fraction 9 2 10 ms 00 99
Oil pressure 11 3 1 PSI 000 999
Oil temperature 14 4 1 degree C -999 +999
RPM 18 4 1 RPM 0000 9999
Unused 22 4
Manifold pressure 26 3 0.1 inHg 000 600
Fuel flow 29 3
0.1 gallon/
hour
000 999
Unused 32 3
Fuel pressure 35 3 0.1 PSI 000 999
Fuel quantity 1 38 3 0.1 gallon 000 999
Fuel quantity 2 41 3 0.1 gallon 000 999
Calculated fuel
remaining
44 3 0.1 gallon
calculated from fuel
computer
000 999
Volts 1 47 3 0.1 V 000 320
Volts 2 50 3 0.1 V 000 320
Amps 1 53 4 0.1 A -999 +999
Total aircraft time 57 5 0.1 hour 00000 99999
Engine time 62 5 0.1 hour 00000 99999
CHT6 67 4 1 degree C -999 +999
EGT6 71 4 1 degree C -999 +999
CHT5 75 4 1 degree C -999 +999
EGT5 79 4 1 degree C -999 +999
CHT4 83 4 1 degree C -999 +999
EGT4 87 4 1 degree C -999 +999
CHT3 91 4 1 degree C -999 +999
EGT3 95 4 1 degree C -999 +999
CHT2 99 4 1 degree C -999 +999
EGT2 103 4 1 degree C -999 +999
CHT1 107 4 1 degree C -999 +999