Connections For Instrumentation; 1) Mechanical Rev. Counter And Hour-Meter; 2) Electronic Rev. Counter; 3) Oil Pressure Indication - Rotax 914 F Maintenance Manual

9.7)

Connections for instrumentation

ATTENTION:Consult also the relevant chapter in the Installation Manual.
9.7.1) Mechanical rev. counter and hour-meter
Drive from camshaft via an angular drive to rev. counter shaft and a flexible
rev. counter shaft to a combined instrument, i.e. rev. counter and hour-meter.
Subsequent installation of a rev. counter shaft is possible after removal of rev.
counter cover on ignition housing.
9.7.2) Electronic rev. counter
On the ignition housing there is an inductive pick-up triggering one each
positive or negative impulse at every turn of the crankshaft. The rev. counter
is an AC instrument.
9.7.3) Oil pressure indication
Via an electric resistance pick-up attached on oil pump with connection to
indicating instrument.
9.7.4) Oil temperature indication
The sensor for the oil temperature is fitted in the oil pump housing. The sensor
is a thermo switch with changing resistance according to oil temperature.
9.7.5) Cylinder head temperature monitoring or temperature warn switch
In the cylinder heads of cylinders 2 and 3 temperature sensors are installed.
They survey the material temperature of the head, not the coolant tempera-
ture. The temperature sensor may be connected alternatively to a monitoring
instrument of a temperature warn switch.
9.7.6) Exhaust gas temperature monitoring
The exhaust gas temperature is surveyed by 4 thermocouple sensors (NiCrNi)
on the exhaust manifold and indicating instrument on panel.
9.7.7) Airbox temperature indication
For readings of air temperatures in the airbox a connection is provided. This
connection is closed on the standard engines by a plug screw.
9.7.8) Boost pressure observation
A Connection is proveded for an absolute pressure gauge in the compensat-
ing tube of the two carburetors.
Modification no.
- 0 -
Reference Main Date
1997 02 01
914 F
Page
63