L5740 Autothrottle

[nebraskasparks]

The autothrottle cable was adjusted from the factory at a pretty high rpm and after adjusting it all the way down the rpm still wants to go all the way to 1900 when the hst pedal is pushed all the way to the floor...which is still kind of high in my book. I was hoping to keep the rpm range limit on the autothrottle at around 1500 to 1700. Anyone have any experience with this?
The nut where the cable comes out is snug and cannot be adjusted back any further.