Look inside the owner's manual of the chainsaw to see if there is a small sticker on it with two numbers. The top number is the model number and the bottom number is the serial number. If it is not inside the manual, or the manual cannot be found, move on to the next step.
Check near the base of the saw casing on the left-hand side to find a small sticker. Use a rag to wipe the saw down if it is dirty so the sticker can be read. Copy both the product number and serial number down.
Call (800) 242-4672. Wait for a Homelite technician to get on the phone and then relay both numbers to them so they can get you the date the saw was manufactured.