I typed up a good long post and my stinking computer crashed. Get the tractor, its a good one.
I had to put new rubber fuel lines on our 5420last year. and when it sits, it will 'click' when you go to start it. Not cuz the battery is low, but it has some sort of sensor on the thermostat housing that is reading erratically. It always starts after 4 or 5 clicks. I had thought it was a bad solenoid but apparently not.