Electronics International SR-8A - Manual (Page 15)

All Other Engines
Equipped with a 5/8"-18 Oil Drain Plug
Remove the 5/8" - 18 oil drain plug located on the bottom of the engine. Install E.I.’s P-120 Oil Probe with a
new oil seal and torque to specifications. Check for oil leaks after the first flight.
7. Carb Temp Probe Installation:
Remove the threaded plug located in the carburetor housing just below the throttle valve. Install the Carbure-
tor Temperature Probe in this hole using a lock washer. Care should be taken not to over-tighten the probe
and strip the threads in the carburetor housing.
NOTE: A Carb Temp Probe should be connected to a precision channel on the Smart Analyzer. That would
be channel 5 or 6 on a SR-8A-4 or channel 7 or 8 on a SR-8A-6. A three to four degree error can occur in
some instances if the Carburetor Probe is not connected to a precision channel.
8. OAT Probe Installation:
Mount the OAT Probe in an appropriate location on the aircraft, using the hardware supplied. The OAT
Probe is sensitive to air temperature changes. For this reason, do not mount the OAT probe in the path of the
cowl or engine exiting air (i.e., on the belly of the aircraft). Other than this consideration the OAT Probe
may be mounted in an air intake vent, on the side of the cowling or anywhere else on the aircraft.
NOTE: An OAT probe should be connected to a precision channel on the Smart Analyzer. That would be
channel 5 or 6 on a SR-8A-4 or channel 7 or 8 on a SR-8A-6. A three to four degree error can occur in some
instances if the OAT Probe is not connected to a precision channel.
9. Mark Each Extension Cable:
In the installation kit there is a pre-wired Extension Cable Harness. One end has a Circular Connector and
the other end has red Slip-on Connectors on the individual extension cables (see the Wiring Diagram at the
back of this manual). The ends of each of the extension cables in the harness has a piece of yellow heat
shrink marked with its channel number.
Mark each of the appropriate extension cables (on the yellow heat shrink) with the function for which it is to
be used (i.e., CHT, EGT, OAT, etc.). An ink pen or marker works well.
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Installation Instructions 6. OIL Temperature Probe Installation: