Go to www.managemyhome.com and enter your model number. They have manuals for most Sears products.
Try the Craftsman web site.
Use the related link below for your manual.
go to the sears website
amanonisang@hotmail.com has one.
I would try here: http://userguides.50webs.com/
Manualsonline.com now has the manual as a PDF File for anybody to view or copy free!!
http://www.searspartsdirect.com/partsdirect/index.action
Online. See the link for help.
If you need the owner's manual for the Craftsman lawn tractor model # 917.270940, find it at http://www.disruptit.com/manuals/L0060081.pdf. Best of luck.
The manual is here:https://www.shopyourway.com/manuals/8874?brand_name_search=917377792+CRAFTSMAN
Contact the manufacturer.
Google, plain out and simple.