What is the purpose of the engine exhaust gas temperature (EGT) gauge?

The engine exhaust gas temperature (EGT) gauge serves a critical role in monitoring engine performance and preventing potential overheating. The temperature of the exhaust gases can provide valuable insights into how efficiently the engine is operating. A higher-than-normal EGT can indicate that the engine is running too lean or that there are other issues that could lead to overheating. By keeping track of EGT, pilots can adjust the engine settings to maintain optimal performance, which helps ensure the longevity and safety of the engine.

Monitoring EGT is especially important in aircraft engines, as improper temperature management can lead to serious mechanical failures or engine damage. It also aids in evaluating the air-fuel mixture and determining if adjustments are needed for fuel efficiency, although that is not its primary function. Thus, the gauge is a vital tool in enhancing safety and performance in flight operations.