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Decrease in EGT for all cylinders

With no change in mixture setting.

1. Carburetor ice. see crbice.htm

2. Decrease in airflow to engine such as caused by induction ice. Check also for any loss in manifold pressure, rpm (fixed pitch prop), and airspeed.

3. Advanced timing - will cause decrease EGT on all cylinders and an increase CHT on all cylinders

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