I, perhaps erroneously, reasoned that since there was no blade attached directly to the crank, it was less likely to have a sheared key on the crank due to the belt drive acting like a buffer, but now I do wish I would've checked this first. Probably less hassle just pulling the flywheel first...
It is a horz. shaft engine not meant for a blade to attach to the crank. Surprisingly, no mouse nests anywhere. And you're right, the valves have never been adjusted since I bought it new.
I blew the clippings out w air pressure when I used to mow w it. Can't say there was much on the cooling fins under the shroud when I removed it, but sound advice.
I bought this Kohler M8T new about 25 years ago and put it on an older John Deere 110. It worked flawlessly when I parked it in the shed 8 or so years ago. I recently changed oil, squirted some oil in the cyl, gassed it up, ...and when I went to pull start it, it pulled a lot harder than it...