Briggs and stratton plastic carb cleaning for the DYI people this is in reference to the carbs used on the newer style push mowers with a plastic carb | My Tractor Forum
How To Clean / Remove Carburetor on Briggs 300E 450E 500E 125cc 140cc OHV Push Mower Engines - YouTube
How to clean and maintain your Briggs and Stratton 675 Series Carburetor - iFixit Repair Guide