I have searched for this unsuccessfully. Oil pressure is high on my ECI io360. About 100 hours. In the yellow at cruise, sometimes red. Checked my Dynon D120 with a mechanical gauge. No washers in oil pressure regulator. ECI AEL 61084 part number on spring. They only have a stronger spring. I called aircraft specialties and they have other springs, but do not know which are shorter/less strong. Do you know a part number for a spring to reduce oil pressure, or a source of help?
RV9A Bill
RV9A Bill