How to Remove the Blades From a Briggs Mower. Disconnect the sparkplug wire. Tip the lawn mower onto its side so you are facing the blade. Place a block of wood against the blade to keep it from rotating. Remove the bolt in the middle of the blade with the socket wrench by turning it counterclockwise. Pull the blade.
Use a piece of wood to deep the blade from rotating. Remove the bolt (B, Figure 21) that holds the blade. Briggs & Stratton engines that are used on walk behind lawnmowers use a right hand thread and would be loosened by turning counter-clockwise with a 9/16" wrench.
Want to upgrade your small engine air filter? Find installation instruction for the Briggs & Stratton kits for filters. Read More Â». Lawn Mower Carburetor Repair .