Rough running / high EGT

Sling2 912iS 125 hrs

Shortly after 100 inspection, I noticed EGT in #2 cylinder rising up to 1,650. At times #3 & #4 have risen but not as high. I’ve also noticed rough running preceding the temperature rise. This occurs below 2,500 ft above the ground (departing sea level airports). Gulf coast flying with high temperatures and high humidity. I have no issues with EGT flying at higher altitudes.

During my most recent trip the EGT rose above 1,700° at 1,500 ft.  I find that I can sometimes temporarily lower EGT by increasing or decreasing power.

Any experience shared or suggestions much appreciated.