Normally, a replacement coil comes with a step by step instruction sheet which explains how to replace your existing coil.
If you are still unsure, your best source of information would be to consult an Authorized Dealer that you purchased the part from.
NOTE: Please read and abide by any applicable Safety Information (PDF) before performing any engine work. This information is not meant to take the place of work performed by a Briggs & Stratton Authorized Dealer. Terms and Conditions apply to all of our information provided on this website. Always be sure to read and understand your engine Operator's Manual.