Approved Installation Manual for the Experimental
Report No 104
EDM-350
Page 12 of 46 Rev A
Engine Data Management System Date 7-10-2021
1/4 x 4" sleeve
tie-wrap 3 places
The most common installation problems are related to poor quality terminations.
9.1
Wiring Markings
The EDM-350 is supplied with special Teflon insulated Chromel-Alumel factory assembled wiring harness configured
for the correct number of cylinders. The wire harness is marked E1= EGT-1, C1= CHT-1, etc.
NOTE:
Unlike most other EGT & CHT installations
the probe wire length is not critical
and should be
trimmed to any length as required for a clean installation.
Do not extend the thermocouple wire with
copper wire.
10.
Exhaust Gas Temperature Probe (EGT) Installation
Use the J2 connector harness 700700 or 700702 labeled E1 through E4 or E6. Remove the existing EGT gauge and
Probe. Replace with JPI probe M-111 in all exhaust stacks.
The Model M-111 Probe will fit any engines where
the existing holes in the exhaust stack are 1/8" to
1/4" in diameter. If no hole exists, it will require the
drilling of a 1/8" diameter hole and ream to fit. It is
important that each probe be mounted the same
distance from its exhaust stack flange. A nominal
distance of 2 to 4 inches from the exhaust flange is
recommended.
If the recommended distance is
impractical
because of obstructions, slip joints or
bends in the exhaust system then position the
probes a uniform distance from the flange as space
permits.
Do not mount probes in slip joints.
Be
certain to locate all holes BEFORE drilling to ensure
that nothing interferes with the probe, clamp, screw
or wire. Careful matching of probe position will
provide best temperature readings.
Insert the probe in the exhaust or previously drilled hole so that the tip of the probe is in the
center of the exhaust
stream
. Tighten the stainless steel clamp to a torque of 45 in/Lbs. Cut off the excess strap close to the screw.
Position probe
in approximate
center of
exhaust
Probe
Clamp
Thimble
note orientation of
slot
Seal Washer
2" to 4"
EGT probe
Drill no. 40
pilot hole,
then no. 30
hole.
CHT probe
ex
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tac
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