High EGT

It runs leaner down in the 4K rpm's and richer in the higher 5K rpm's.  So lower EGT'S in the 5K rpm's.

Thanks Roger,

Thats interesting - here was me thinking that the CS prop was loading the engine below peak torque, causing the EGT to rise ahead of CHT/Coolant.

My previous 912 ULS, with ground adjust/fixed pitch, never had this indication (that I recall) Could loiter all day in the low 4000 rpm's.😈

The prop pitch can affect engine temps, fuel usage, climb and cruise performance and stresses the engine. You never want to over pitch a prop.

Sean,

You had it right. The heat produced from combustion goes one of two places, into the heads to produce thrust, or out the exhaust where it’s wasted.  During normal flight conditions, as you load the engine the CHT goes up and EGT goes down.  Unloading has the opposite effect.  When you reduce power with the prop in takeoff setting the engine is quite unloaded, and thus much of the combustion energy is wasted out the exhaust. The mixture settings in the carburetor do have an effect, but not nearly as much as the load profile.