Hello!  We have an excellent flywheel cup and nut for a Briggs 5.5 HP engine, model 126432 0036 E1 that is clean and ready to install.  Briggs part numbers are 591302/692591.  Please feel free to ask any questions you may have and visit our store for complete small engines, small engine parts, antiques, collectibles, farm items, sewing supplies and so much more!  Thank you for viewing.