I have a "Owners Guide" for a 21 inch snow thrower for model numbers 317-180-000, 317-181-000, and 317-190-000. It is for a "MTD" brand snow thrower. The owners guide is 14 pages long. It does have a few stains on the front cover as shown. It also has lots of useful information. It shows full diagrams along with the parts list. I showed the last half page of the parts list in my pictures, but the page infront of that is a full page of the parts list. It even has a trouble shooting chart.