CATEGORIES HOMEBriggs and Stratton EnginesAnimal EngineOEM PartsCarburetor Assembly Idle Speed Kit, Animal, LO206 Item Number: 555586 Price: $6.87 Add to Cart Description The Briggs and Stratton 555586 is an idle speed kit, used to adjust the idle speed on the Briggs and Stratton Animal and LO206 engines.