by MichaelFarley56 » Sat Dec 11, 2021 5:38 pm
It’s been years since I had this issue but I ultimately tracked it down to the MGL EFIS and RDAC I had installed. I still don’t know how they are “calibrated” but in order to fix that issue I ultimately removed the old ‘gray box’ MGL RDAC and my black and white Stratomaster Ultra XL and installed a new design MGL Xtreme EFIS and the new style RDAC. Once I did that everything worked normally.
In order to determine this, I borrowed a high quality infrared heat gun, warmed up the engine and measured the actual head temps. I remember seeing indications on the MGL of temps nearly double what they actually were.
If your CHTs are within normal limits, you may want to consider new EGT probes or at least swap the front ones for the back ones and see if the temps remain constant or see if the ‘hot’ ones follow the probes.
Best of luck!
Mike Farley
Waiex #0056 - N569KM (sold)
Onex #245