Sounds to me like the cable from the big full size lever to the belt clutch in the drive mechanism is too tight
Belt should be loose on the drum pulley until you pull lever which pulls in a roller on an arm which tensions the belt and connects engine and drum.
Remove side cover which is 5 or 6 hex bolts. You should see everything and it will be.clear
I have a 35s and can confirm it should roll.
The only thing connecting the engine to the roller is the belt clutch (source I had it dismantled last week as my clutch belts needed replacing)
Keep the cylinder sharp with cutting paste and a multisharp cylinder mower sharpener. Little and often keeps it sweet if you neglect it for too long you’ll have to get a pro with a propper lathe to correct it.