Please use your model and product numbers to verify fitment before purchasing as all sales are final.  If this cylinder burns up immediately after starting, it is 99.9% likely you didn't address the issue that cause the engine failure the first time.  If you are not pressure and vacuum testing your engine after the rebuild you are taking a gamble that the saw has an air leak and WILL not last long.  No returns accepted and no refunds.  Ships USPS or UPS ground based on cheapest price to your location.  Box 3