Belt Replacement on S21ZSN

I have this S21ZSN that I rescued from a dealers scrap pile (for free) replaced a crank seal and have been using for a number of years.

I want to replace the drive belt and have done considerable Google searching for an easy way.

Is there an easy way?

Well it looks like it is the same as a duraforce drive belt. You have to take all the bolts out of mounting plate so you can lift engine to clear the crank shaft to remove belt. You do not have to remove engine just blade. It is not that bad of a job, if you can lift mower up with some kind of make shift bench so the engine will stay in place while lifting to clear crank is the easiest or at least what I experienced. You should be able to find a service manual on line that will give you a better description that what I have explained. Good luck.