I still have the Snapper 30" RER that my dad bought around 1968.  Am on about the 8th or so engine on it.  Currently have a Briggs & Stratton 12.5 OHV replacement engine on it that I got from Smallenginewarehouse.com.  Has plenty of power and starts very easily with the electric starter.  Will keep rebuilding Snappers so when my great grandchildren need a mower, they stop by and pick one up from me.