Briggs & Stratton 499421 Interlock Switch Replaces 398758, 398639

Keep it Running - Keep it Genuine. Help keep your outdoor power equipment running at peak performance by ordering Briggs & Stratton replacement and maintenance parts. You can find the right part you need including carburetors, air filters, spark plugs, tune-up kits and other engine repair parts. Only Briggs & Stratton genuine parts are specially designed to exact OEM standards, manufactured and tested to help deliver optimum performance in Briggs & Stratton engines. Not only are Briggs & Stratton genuine parts guaranteed to fit, but using them ensures that the Briggs & Stratton engine they are installed on complies with applicable (EPA) emission regulations.