travis do you have a power dump on your bed ? the horse mats are heavy .... really heavy, and the mat may retain water and dirt under the mat. we just paint ours every other year. and the other thing about the horse mat is stuff will not slide when you dump them.
May also be the ignition coils failing when hot, let em cool down, they work great, heat up, no spark..
Woops, ignore the above, I misread your problem.
But I would check for spark when it won't restart, if it has spark, then it's a fuel issue... I would feel of the carburetor float area to be sure it isn't hot enough to keep you from touching it.