912 ULS Red Line Oil Temp

If it is easy to remove the stat then I would try that in case it is bypassing the oil cooler. Could any of the oil hoses be reducing in internal diameter if they are getting too hot? As the rubber hoses age, they naturally get softer and this becomes more likely. Look at areas where they are tight bends, particularly if they run next to something hot.

Let us know what you find.

I have had to replace 1-2 thermostats over the years, but it's pretty rare. Oil hose in too tight a bend squeeze down and reduce flow and that will cause increased heat. When I have an aircraft Mfg with a bad bend I install a spring in the hose to maintain its wide open status. I have seen many temps go down 15F-20F by doing this.

Problem solved! The oil Thermostat was the culprit. Thanks for all the help.

You guys rock!