OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Briggs & Stratton Engines 4hp Briggs and Stratton Quattro

Let's check the governor, in case the spring is not working. To do that, first set the speed control on minimum speed (idle). Look at the position of the throttle butterfly lever: it should be closed nearly to the idle speed screw. Then move the speed control to maximum and see if the throttle butterfly lever has moved to maximum, without you touching it or any other part of the mechanism.