Enginesengine instruments

Exhaust Gas Temperature (EGT)

Exhaust Gas Temperature (EGT) is an engine instrument that measures the temperature of exhaust gases as they leave the cylinders. It is primarily used by the pilot to accurately adjust the mixture control to achieve specific power or fuel economy settings during the cruise phase of flight. EGT can also help diagnose mixture, ignition, or combustion abnormalities.

Key Points

  • •Provides real-time feedback on the fuel/air combustion process within the cylinders.
  • •Used to find <strong>peak EGT</strong> for precise leaning of the mixture during cruise.
  • •Helps diagnose mixture, ignition, or combustion abnormalities.
  • •Not typically used during take-off or climb — mixture leaning using EGT is a cruise procedure.

Exam Relevance

Candidates must understand the purpose of the EGT gauge and how to use it in conjunction with the mixture control to prevent engine damage.

Related Terms

mixture controlcylinder head temperature

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Exhaust Gas Temperature (EGT) | The Pilot Exam