Not Starting after it sits

I can start it and run it. If i stop it on a short drive it will start, If you run it 30 miles or for an hour and shut it off it will start right away. If you leave it sit for a few min it will not start till it sits for 15 or 20 min.
It has once or twice stopped while running and would not start till 20min or so ????
Help.........

Sounds like the early stages of your crank sensor going bad.

Sounds like the early stages of your crank sensor going bad.

Checked it out last night and when it would not start, there was no spark and i unpluged it and pluged it back in. It started right away. I will be changing it. Ley you know thanks