2018 Briggs and Stratton 450 series no start. This lawn mower was returned to Walmart, customer stated no start after very little use. We bought it "as is" non-running from the store manger for $20 reg price $150 new. In this video I will show you how to clean a plastic B&S carburetor, for this is the third time this summer I have seen the same problem. DO NOT attempt repairs in this video without a licensed certified small engines tech present.