OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Briggs & Stratton Engines B&S Engine, two issues..

Make sure the jet is fully clean. Sometimes a wax like substance can coat these and cause a lean burn issue. Also replace the O-ring between the carburetor and intake tube.

As a last resort you can try increasing the jet size if you have micro drill bits available. Just be careful not to oversize as this lead to over rich condition.