MGL Avionics Stratomaster Ultra “L” Owner’s manual
Page 77
Connecting a Rotax 912
The Rotax 912/914 contains two built in NTC type CHT temperature senders. In addition oil
temperature and oil pressure sender is provided as standard.
Due to the fact that the 912 has two carburetors (one for each side of the engine), two EGT
probes should be connected, one for each exhaust stack. You can connect four EGT probes if
you like. In this case the relevant EGT displays will indicated the highest reading of any two pairs
of probes. You would use TC1 and 3 as one pair and TC2 and 4 as the other pair. Each pair
monitors one side of the engine.
CHT1 and CHT2 connect to the standard CHT senders, again one for each side. Connect oil
pressure and oil temperature and you are done.
In the Stratomaster Ultra, use “Engine quick select” to choose the 912 setup and then use
“Engine detail setup” to change any settings to your liking.
Connect the Rev counter wires (blue/yellow and white/yellow) as follows: One of the two wires to
the Ground terminal of the RDAC, the other to the REV counter input. It is recommended to also
connect the supplied 220 ohm ballast resistor. Connect one end to the Rev counter input, the
other to the Ground terminal of the RDAC.
Do not forget to set the “rev counter setup” in the “Basic setup menu”. Select a value of 10 as the
engine generates one pulse for every revolution.
Please note: Most of the senders are “grounded configurations” This means they connect
electrically to the engine block. It is vital for good and stable readings that you connect the
“Ground” terminal of the RDAC to the engine block using a short, good quality electrical
connection.
CHT
OIL temp
EGT
E
G
T
REVS
OIL
pressure
GROUND
CHT
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