hitachi zx 200lc throttle problem

On job working on another machine and owner came over and wanted me to check the hitachi out said they had replaced the throttle cable when the muffler melted it and that it now wants to go wide open when they crank it and after it warms up it will start going back to idle he said that they had adjusted linkage and cable and arm on step motor and it will work fine until cut back off . Its not remembering where its at and I don't know the way to program the set up on a hitachi or have manual, have done it numerous times on kobelcos and others. Anyone know the steps to the learning sequence and what the step motor arm adjustments should be ? also the toggle switch by the fuses 3 positions back position has a E next to it I think that's emergency ? then a center and forward position which one is run and which one is learn position ?