I have a Craftsman 20HP Garden Tractor that started regularly till today. When I turn the key all I get is one click that comes from up front. The battery has a good load on it. I have tried rocking back and forth. I have changed the Starter Solenoid. So far no luck. Any suggestions are appreciated. Thanks in advance.

The click up front is probably the fuel solenoid that is screwed into the bottom of the carb.

Remove cover plate just in front of seat (shifter cover) and there should be a fuse holder there,check to see if fuse is blown!!