Hello!  We have a good used exhaust valve from an HMSK80 155444S Tecumseh snowblower engine that has been cleaned and is ready for final finish.  Includes spring and keepers.  Tecumseh part number is 27878A.  Please feel free to ask any questions you may have and visit our store for complete small engines, small engine parts, antiques, collectibles, sewing supplies, seasonal items, kitchen items and so much more!  Thank you for viewing.