OutdoorKing Repair Forum Forums Repairs and Maintenance Questions on Engines Questions On Briggs & Stratton Engines Briggs & Stratton 3.5 over revs

I changed the carburetor-no difference. Linkage wrong somewhere? something else? Could it be the breather tube from the crankcase to the carburetor - it is loose and won't screw into the fully tight position and still be able to get the boot to the carby on. Could it be sucking air there? That may sound dumb but don't forget who you're dealing with!