The first one or two digits in the first block of numbers (the model) is the engine displacement in cubic inches. Yours is 30 cubic inches, or about 490 cc. It is a fourth generation design, with vertical crankshaft, plain main bearings, pressure lubrication, and a 12 volt gear drive electric starter with an alternator.

I don't see anything on that specific model in the Outdoorking manuals section. Have you tried the B&S site? If your engine is an Intek or Vanguard (that is, it is OHV) this seems to be the illustrated parts list:
http://bsintek.basco.com/BriggsDocumentDisplay/default.aspx?filename=Z6ortHVJ1DajI

and this is the owner manual:
http://bsintek.basco.com/BriggsDocumentDisplay/default.aspx?filename=29lvwFKT9FzXFix2