A great question. Depends on your state laws and how (if) the saw was originally registered. Most products are warranted for the original purchaser, but this varies by state. Many companies now simply state the warranty follows the product- this makes alot more sense. The 361 is not "by definition" a Professional saw- those are MS 440 & larger. A 361 registered as a homeowner's saw would carry a 1 year warranty. For professional purposes it would have a 90 day warranty, and for rental use a 30 day warranty. Has this saw been registered and if so, for what purpose. Get the serial number and post it, one of us Stihl dealers can run it and find out the info Stihl has.