Not being conversant with the Honda height adjustment system I cannot understand how one corner can sag yet the corner opposite on the same adjustment shaft does not.
Is the system similar to most others that have a front and rear shaft running across the mower with the axle attached to a quadrant, the front and rear being connected by a connecting rod that also has a spring attached to help when raising and lowering? And there is usually a handle that you use to raise and lower that locks into place to hold the height selected.
Because from what you show in your photos, unless the quadrant on the left has come adrift from the cross shaft (and it does not appear to have) I would have thought that both sides would drop equally.
Beech
