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Step 1. Install the ECU
CAUTION
THE ENGINE CONTROL UNIT (ECU) HAS A SPECIFIC CONFIGURATION
FOR EACH ENGINE AND AIRFRAME. THE ECU AND ENGINE HAVE
FACTORY-DESIGNATED SERIAL NUMBERS THAT GO TOGETHER.
MAKE SURE THE SERIAL NUMBERS ON THE ECU AND THE ENGINE
AGREE WITH SERIAL NUMBERS IDENTIFIED IN THE
DOCUMENTATION SENT WITH THE ENGINE. IF THE SERIAL
NUMBERS DO NOT AGREE, DO NOT INSTALL THE ECU. CONTACT
LYCOMING ENGINES IMMEDIATELY.
Install the ECU with the correct serial number on the airframe in its designated location in
accordance with the wiring diagram. Also refer to Appendix B in the TEO-540-A1A Engine
Maintenance Manual for additional details.
CAUTION
NOTICE: Torque the ECU fasteners in accordance with the latest revision of the Service Table
of Limits - SSP-1776.
Step 2. Install the Power Box
1. Install the Power Box with the correct serial number on the airframe in its designated location
in accordance with the wiring diagram. Refer to Appendix B of the TEO-540-A1A Engine
Maintenance Manual for additional details.
NOTICE: Mounting the ECU to the Power Box requires four 1/4-20 bolts with a maximum
length of 1/2 inch.
2. The Power Box can be installed in a stacked configuration.
CAUTION
NOTICE: Torque the Power Box fasteners in accordance with the latest revision of the Service
Table of Limits - SSP-1776.
Step 3. Install the Engine on Mounts
CAUTION
MAKE SURE THAT THE ENGINE MOUNTS ARE ALIGNED AND NOT
BENT OR DEFORMED. IF THE ENGINE IS INSTALLED ON DEFORMED
ENGINE MOUNTS OR MISALIGNED, THE ENGINE CAN BE PUT UNDER
UNUSUAL FORCE WHICH CAN CAUSE MALFUNCTION.
USE CAUTION AROUND THE ECU, POWER BOX, WIRING HARNESS,
SENSORS, AND ACTUATORS. IF ANY OF THESE ITEMS ARE
DAMAGED, THEY MUST BE REPLACED, (EVEN IF ONLY ONE WIRE
BREAKS ON THE HARNESS) AS PER INSTRUCTIONS IN THE TEO-540-
A1A SERIES ENGINE MAINTENANCE MANUAL.
NOTICE: The engine is sent from the factory with the wiring harness sensors and spark plugs
installed (Figure 1).
Engine Installation
Page 34
THERE MUST NOT BE EXCESSIVE CONVECTIVE OR RADIANT
HEAT IMPINGEMENT ON THE ECU AS A RESULT OF THE
INSTALLATION.
THERE MUST NOT BE ANY EXCESSIVE THERMAL CONVECTIVE OR
RADIANT HEAT IMPINGEMENT ON THE POWER BOX AS A RESULT
OF THE INSTALLATION.
TEO-540-A1A Engine Installation and Operation Manual
© 2018 Avco Corporation. All Rights Reserved
October 2018
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