Here is the illustrated parts list for your engine:
http://bsintek.basco.com/BriggsDocumentDisplay/Z6ntAFVJ1DajI.pdf

Here is the operator's manual:
http://bsintek.basco.com/BriggsDocumentDisplay/flivAJX-nfBhU7y.pdf

Without some pictures of your engine I can't tell which type of governor it has. Here is what seems to be the most common type for 130000 series engines (from B&S workshop manual):
[Linked Image]

Note that Item 8 is the governor spring. Please post pictures of the corresponding areas of your engine (including both around the carburetor, and around the governor lever) so we can confirm which design you have.