Do you need parts for a Briggs and Stratton Engine ?

To help you with this we will need to know the following:

Your Briggs and Stratton Model, Type and Code Number. 
If you have a flat head engine ( non ohv ) then the code will normally be on the top metal flywheel cover, pressed into the metal, it can be on the front or side. 
If you have a ohv model then the numbers are usually on the valve cover, pressed into the metal, 
They will be in the format of 
Model 000000 Type 0000-00 Code 00000000.
Here is some example images to help you. 
Identifying your Briggs and Stratton engine - YouTube
MODEL:118432, TYPE:013761, CODE:03120549 Briggs-Stratton | GERMANY Sales
Briggs & Stratton Recalls Model 40 V-Twin Engine Due to Injury Hazard; Used  on Sears, Husqvarna, Bad Boy Riding Mowers |
Once we have these codes we will be able to look at the correct parts list for you model.