Tdog,
</font><font color="blue" class="small">( Whatever, if the clutch was slipping as it broke up the sod, seems like the bolts need tightening, doesn't it?? )</font>
I agree that it needs to be adjusted to slip less.
There are at least two slip clutch designs. The one on my rough cut mower would require tightening the bolts. I loosen them every spring and make sure that the clutch facings are not stuck to the steel plates. Then I tighten and measure the space between two plates with metric drill bit as a gauge to get it set correctly. The manual provides the dimension for the adjustment.
On my tiller, which has a Walterscheid clutch, tightening the bolts releases the clutch. I tighten them every spring and make sure that the clutch facings are not stuck to the steel plates. Then I loosen them to allow the clutch to engage.
You might want to spend a few minutes determining how it works before changing the adjustment. If it is the type that you tighten the bolts to reduce slippage, make a note of the current distance between the two plates before you move anything. Also, verify that it is adjusted evenly at all adjustment points. If it were loose on one side, I suspect that it would tend to slip.