Kettler Favorit Assembly Instructions Manual page 16

Step 6
In picture "F" the arrow is pointing to the 50 knurl mark which is in the highest set
th
of ten knurl marks. If the clamp is positioned in this set of knurls, then the
resistance is very difficult.
It is recommended that you first try positioning the clamp the lower knurl marks,
between 1 – 10, and then if you wish for more resistance, adjust to higher knurl
marks.
Remember to first point the rower arm vertically before loosening the clamp for
easiest repositioning. It is very difficult to reposition the clamp when the rower arm
is lying down horizontally.