I think mine stuck shut for a while.Hit 204*F when I shut it off. I noticed exhaust was really hot.So I hopped back in to see gauge .Ive never seen it past 188-190*F ,usually 184 tops.Went for a ride and shot back up to 197*F then cooled to about 190*F for a few miles.Still higher than usual.I bought a ScanGuard after reading this thread to keep my eye on temps.I don't think it has EGT.Do you think it's the thermostat?