5th gen idle speed specification (from the Helm's):
1) IAC valve disconnected & no-load conditions (basic mechanical idle -- this is what you should be using if you're adjusting the idle screw): 550 +/- 50 RPM
2) Normal idle, no-load conditions: 700 +/- 50 RPM
3) Normal idle under load (electrical load or AC): 790 +/- 50 RPM
I don't know why your idle is normally high Dave. Mine has been in accordance with the Helm's ever since I bought it new.
