Hello!  We have an excellent used starter cup, nut and washer for a Tecumseh HMSK90 snowblwer engine that is clean and ready for use.  Part number is 35985B/C.  Craftsman engine model is 143.999001.  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, holiday decor, sewing supplies, puzzles and so much more!  Thank you for viewing.