Need belt diagram or manual for craftsman model # 917270810

It looks like you are out of luck on the manual. Model #917270810 | SearsPartsDirect.com However, you can try for a newer model tractor with a 42" deck, they likely use the same configuration. The belt diagram is also usually a decal on the deck so inspect closely. Also, when surffing the Sears site be sure to type your model # correctly, it is 917.270810. The site needs that period in the correct place.

It looks loke the manual is available through Home Improvement Projects, Product Manuals & Home Management Tools - Managemyhome.com

Here is the url I used: Manage My Home - Find Product Manuals, Search Results - ManageMyHome.com