I also have a "won't start after running hot for hours" problem.
The temporary fix is to whump the starter solenoid with a tap or two
from a hammer and screwdriver.

The cause is not enough voltage reaching the starter solenoid terminal.
Or the solenoid itself needing cleaned and lubed (NOT an easy chore)

-- 
Many thanks,

  Don Lancaster

  Synergetics Press  3860 West First Street  Box 809  Thatcher, AZ 85552
  Voice phone: (520) 428-4073    email: don@tinaja.com     
  Visit my GURU's LAIR web site at http://www.tinaja.com

  Know your acronymns:  url = utterly rancid location 
                        net = not entirely true
                        www = world wide wait