I don’t understand instructions, after setting the rotation speed and turning it off, turn on the engine and the regulator immediately stands at speed or needs to be raised from a minimum Return to low idle motor or what? knob? set and then turned off to a minimum or left in the 60 rpm position? ...Return the engine speed to low idle and stop the airlock.but what we do with flow divider? do we return it to the beginning or leave it in the middle?