Craftsman lawn tractor with Kohler 17hp motor?

I own a craftsman lawn tractor 42" cut with a Kohler 17hp motor. Yes it is old but well maintained. yesterday while mowing my yard the motor just stopped running. No odd noise, no smoke, no knocking or anything. It did make a sound like running out of gas just before shutting off but my tank is 3/4 full. Also before the season started I changed spark plug, air filter and oil, (I can't recall when I changed the fuel filter and or if that could cause a restriction to stop motor from running.) Also I had just filled it up with gas before mowing and got about half of my property mowed. My property is 3/4 of an acre and this lawn tractor has handled it all these years with no issues.

If there is a Craftsman or small engine tech out there that could point me in the right direction of what to check, ie.. magneto? coil? or something minor or cheap to try before I load and haul to a repair center would be appreciated.

please do not reply unless your a small engine tech or Craftsman tech. thanks

2 days ago - 6 days left to answer.

Additional Details

all answers so far sound like good advice, will look at mower Wednesday night and choose a best answer depending on which one was the most accurate

ok, I looked at the mower last night and found that on the bottom of the bowl on carb, there is a cylinder shaped part attached to the center/bottom of bowl and has one wire coming out of it, and it is leaking fuel. So I am thinking somehow that means the carb if it has a float is stuck??? let me know what you experts think