I need a belt diagam for a scotts lawn mower by John Deere. It is a 20horsepower motor and 48 in cut.

Hi! Jpgarr, welcome to AMHD :)

Using the search feature here at AMHD, I found this. If it isn't the right one, use the link there to find yours.
https://www.askmehelpdesk.com/tools-...am-389806.html