I can't say I admire it as a solution, Gadge. It is better than putting thin shims in that location, but it is still wheelbarrow engineering. It is a low-friction, low-pressure connection carrying whatever torque it takes to spin the thrust bearing inner ring, so there will be some slip between clutch disk and washer, and therefore some (probably slight) wear. A better solution would be to pin the spacer to the clutch disk. As it is, it would not do as a car repair, but admittedly lawnmowers don't run as many hours as cars do.
