I agree with the posts, which is why I mentioned this in the first place... I don't usually lend tools of any kind.
I had taken the PT to their house to grind a couple of stumps. After working on one for an hour, my buddy took a turn. I was satisfied, after another hour watching him, that he was operating it satisfactorily.
But realizing there was easily another 4 hours of work to be done, I opted to leave it there for him to finish. (they were big stumps in awkward positions, thus the garage wall strike).
I'd already spent two hours at another friend's taking out a stump before I brought the PT to this second job.
After three hours riding the stump grinder, I was tired. That thing wears me out.
My PT was returned Saturday, cleaned and fueled and with nothing broken. Whew.
Phil