Fuel Injection System - Lycoming IO-390-D Series Installation And Operation Manual

Fuel Injection System

The fuel injection system (Figure 7) includes: a fuel manifold, fuel injector, four injection nozzles
(one per cylinder), a diaphragm-type fuel pump, and fuel lines which connect the:
• Fuel pump to the fuel injector
• Fuel injector to the fuel manifold
• Fuel manifold to the four injection nozzles
Refer to the fuel flow and consumption curves in Appendix B.
System Description
Page 4
IO-390-D Series Engine Installation and Operation Manual
Figure 7
Fuel Injection System
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March 2020