I have been tasked with trying to get an old Pincor 5500 watt generator running.  My brother-in-law had this under his porch for a few years.  I've never seen more half-eaten acorns, grass, and crap come out from an engine housing.  It is an 11 horse Briggs.  I can't find any numbers yet.  It has an external oil tank.  The engine does appear to have good compression.   
I have the shroud (with recoil starter) off, but I can't figure out how to proceed.  I am presented with the ratcheting part of the starter mechanism (sort of a square stub)  but what to do next?  It just isn't obvious to me.  There is more "stuff" under the flywheel to remove.  
I will try and clean the rust off the flywheel and coil and then check for spark before proceeding.  
Please be kind, this is my first Briggs.
Ralph