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IO-390-D Series Engine Maintenance Manual
IO-390-D Series Engine Maintenance Manual
(5) Disconnect the wires from the Power Terminal, P-Lead Terminal, and P-Lead Shield
(Ground) Terminal (Figure 3). Label each wire as it is disconnected to ensure the
harness is reconnected correctly.
(6) Remove the three screws that attach the ignition harness to the EIS (Figure 1) and
remove the ignition harness from the EIS.
(7) Hold the EIS and remove the two nuts, two lock washers and two clamps (Figure 1)
from the EIS. Discard the lock washers.
(8) Remove the EIS from the accessory housing.
(9) Examine the O-ring (Figure 1) for cuts and damage. Replace the O-ring as necessary.
B. EIS Installation
(1) Install the Drive Gear (Magneto Gear):
(a) Apply a light coat of C5-A Copper-Based Anti-Seize compound to the tapered
section of the EIS driveshaft (Figure 4).
© 2020 Avco Corporation. All Rights Reserved
March 2020
Figure 3
EIS Ignition Harness Connection Terminals
Figure 4
Anti-Seize Application
74-30
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