IO-390-D Series Engine Installation and Operation Manual
Ignition System
The all weather-shielded ignition system (Figure 5) includes:
• Eight spark plugs (two per cylinder)
• Ignition harness
• Ignition system consisting of two Lycoming Electronic Ignition System units or as an option
the engine can be equipped with two magnetos (identified in Appendix A).
Starter
The engine can have either a 12V or 24V starter (Figure 6). Refer to Appendix A.
© 2020 Avco Corporation. All Rights Reserved
March 2020
Figure 5
Ignition System
Figure 6
Starter
System Description
Page 3