Small Engines (Lawn Mowers, etc.): CRAFTSMAN RIDER TROBLESHOOTING, proper manuals, model numbers

Question
I HAVE A CRAFTSMAN 20.HP 42" RIDER MODEL 917.270930; NEVER HAD ANY PROBLEMS UNTIL NOW, GOT HAVE THE LAWN MOWED TODAY AND IT WOULD NOT GO IN REVERSE OR FORWARD, PUSH IN ON THE CLUTCH AND NOTHING; IN FACT WHEN I PUT IT INTO ANY GEAR IT WOULD MOVE.  ANY IDEAS AS TO WHAT THE PROBLEM IS?  WOULD GREATLY APPRECIATE ANY THOUGHTS ON THIS PROBLEM

THANK YOU
DED

Answer
Hello Deb:

Send me the Model Numbers Off the Mower, Please. With these I can Locate the Proper Manuals and Better Assist you. However, The Ground Drive Belt May have Broken or Jumped Off an Idler or Pulley. Hope this Helps. I am here if you Require more Assistance. Let me know what Happens, Please. Thanks.

Good Luck

Respectfully

John