Bruce,
Sorry for the late reply.
Not sure what you mean about the collar adjustment?.
There is a taper pin that holds the collar in position which backs onto the spring on the shaft.
Are you saying that there are additional holes in the shaft that you can choose to adjust spring tension?.
Looking at the clutch lever, I assumed that the clutch was adjusted by the double threaded bolt that goes through the side plate of the mower?.
Hope that makes sense?.
Pedro
