Rotax 912 ULS 3 - Troubleshooting: Engine Start and Run Issues; Starting Problems and Engine Run Issues; Load and Oil Pressure Issues

Effectivity: 912 Series
Edition 1 / Rev. 1
d04635
page 51
May 01/2009
BRP-Powertrain
INSTALLATION MANUAL
Fig. 24
09152
1
2
12.4.1) Measurement of cylinder head temperature and coolant exit
temperature
There are two temperature sensors (1) (see Fig. 23) on the cylinder 2
and 3 for measuring the cylinder head temperature. During flight test the
place with the highest cylinder head temperature must be found, this
can vary with different engine installation (cowling or free installation,
tractor or pusher, fight speed etc.).
The measuring of the coolant exit temperature is performed using a
separate sensor, which has to be installed in the line between expan-
sion tank (1) and radiator inlet (2).
The sensor may be installed in a "TEE" inline with the fluid hose or the
expansion tank may be modified to attach the sensor (not supplied by
BRP-Powertrain).
▲ WARNING: Do not restrict the coolant flow with the sensor devise.
■ CAUTION: It is possible to receive a misleading reading when
measuring fluid temperatures. If fluid volume is lost
and the probe is not fully submerged in the fluid the
display could show a lower temperature than actual
(measuring air temperature instead of fluid tempera-
ture).