16
INSTRUMENTATION
There are many engine monitoring instruments available for your Hirth engine. Of course, it
is good if you can have all of them available to you. However, weight and/or space limitations
may not allow all of them. The following instruments are minimally required to properly
operate the engine:
Tachometer
Cylinder Head Temperature (CHT) Monitor for each cylinder.
Exhaust Gas Temperature (EGT) Monitor for each cylinder.
NOTE: Use 10mm CHT sensors. Do not use 14mm CHT sensors. If using Westberg brand
EGT gauge combined with EIS brand EGT exhaust probes there must be 4 feet of
thermocouple extension wire spliced in to allow correct resistance to the probe and accurate
readings.
Installation of EGT thermocouple to be mounted 75mm. as measured through the center of
the exhaust tube, from the outer edge of the exhaust port. If using EIS EGT probes with
Westberg EGT gauge 4 feet of EGT extension wire must be spliced in to achieve proper
readings.
CARBURETORS
CARBURETOR ICE
WARNING!!! Carburetors can be susceptible to what is known as “Carb Ice.”
Carb ice can accumulate in the carburetor(s), which can seriously affect mixture, throttle
control and of course, performance. Carb ice, when encountered is usually serious and in the
worst conditions will cause engine stoppage.
It is the responsibility of the owner/operator to ensure that all precautions have been taken to
minimize the risk of carb ice, such as installing some sort of carburetor heating method which
will either prevent carb ice from forming or eliminate the ice before it becomes detrimental, if
ice does occur.
Summary of Contents for F-23
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