Then you would adjust the idle-stop/speed screw so that there is a 1-2 mm gap when the servo is in the neutral position. You might need to readjust the spring collars on the throttle linkage to force the throttle arm against the idle speed screw.
An illusion is a distortion of perception. The brain arranges, sorts, and organises data from the senses. Normally the system works well. Sometimes it does not, and we see illusions. In general, they are shared by most people in the same situation.
An allusion is an indirect reference to something. An illusion is an erroneous perception or belief. Elusion is the act of escaping. An allusion is an indirect reference. There are other words for direct references, including simply reference. These writers use allusion well: Anyone familiar with the works of noted author John Feinstein knows that title could be an allusion to his 1980s book about a legendary college basketball coach and the Indiana program. [Boston Herald]