One low EGT?

seven hours into testing with the new engine mount on a KF IV. 80 horse. All is smooth and the engine appears to run fine but I see a low reading on one EGT monitor. (I have 3) the Egt stayed at about 8 while the other two where at 12 and 13 respectively. Thats their normal range for all of the last 450 hours.
It was fine until today so I am wondering where to look first. I do notice more soot than usual on the exhaust pipe, but all in all it runs fine.

I finally located the thread for the egt. I had looked and just didn't see it. no reply necessary. yet.