You can download a PDF version of a Troy Bilt riding lawn mower operator's manual from the troybilt.com website. Simply provide the model number for your mower, and you can choose which manual you need.
From the homepage of the Troy Bilt website, select the Owner's Center. Here, you can enter the model number in the section designated Operator's Manual to find the information you need. If you have the serial number, the website will provide the exact manual for your equipment. The Owner's Center also demonstrates where to find the model and serial number if you do not know it.