You can try: http://www.deere.com/en_US/homeowners/services_support/manuals.html
Google John Deere F525 Manual and it should be the first link. It is however not downloadable.
The manual pto is the switch used to engage the mower deck.
You can get the manual where you bought the mower. just go to where you got it and ask for another one. and if you bought it off someone go online look it up and tou should be able to print of the manual, right there on the website...
you will need your serial # then call 1-800-522-7448 that is john deere's publications # you can order direct from there most of the time you can get manuals in book form or CD
You can find the operator's manual for that engine at www.briggsandstratton.com. You will need to contact the manufacturer of the mower for the lawn mower owner's manual. Briggs and Stratton did not amke that mower, only the engine.
You can change a John Deere LA 175 mower deck belt configuration by checking the diagrams and instructions in the owner's or manufacturer's manual basically.
go to briggsandstratton.com
read the owners manual there all different
eBay
You can order it from Sears online for about five bucks. I have been searching on line and can't find a free download either.
john deere smallest riding lawn mower
Click on the link below to get to your online manual. You can view, print or save it there.