It might not give you the kind of detail you are looking for, but for an illustrated parts list you can go to:
http://shop.briggsandstratton.com/BShopProductListingPage.asp?rsvp=0&PARENTID=0&SessionID=43C7B3A0-6A44-4EB2-B2CC-23B437198A68&MECID=100&CATALOGID=56B2B9A7-283C-11D4-8886-00B0D0203414
Enter your model number and type in the fields provided and click search. The IPL will show an exploded view of the carburetor and all it's parts.
If that's not enough detail, order a genuine briggs and stratton repair guide for your engine series. That gives much more detail on the process of rebuilding a carburetor.
Hope this helps!
-Chris Charles
Chris Charles, July 2007