Changing the shim-stack in the center of those clutches will be an expensive job, Bob. We need to be quite sure that is the problem before incurring the cost. I agree with you that is probably what is wrong, but it will be several hours' work at dealer rates, and if it isn't what is wrong, the money will be wasted. First the diagnosis, then the cure. Also if that much wear happened in just 100 hours, DWB needs to change the way he operates the machine, and we shouldn't ask him to do that without being sure it is necessary.
(If his block is so steep that he has to run the engine fast and slip the clutch all the time, let's face it, he needs a different type of mower or a lower final drive ratio. I have some doubts about a 26 hp engine on a Greenfield drive system to begin with: if you are going to have a single speed drive system, and then you double the size of the engine, you will need bigger clutches or a different driving style to operate it successfully on steep slopes.)
