I have a Craftsman tractor model 917.272751. When I start it, it runs for about 1 minute,then starts missing and finally stalls. Sometimes it will restart, but sometimes it will not. However, after awhile, it will start again. Please advise

Hi,
You have a gravity-fed Intek fuel system so it is the fuel filter, trash in the tank, the gas cap, the fuel shutoff solenoid or an obstruction restricting fuel flow probably. I would doubt the cap because of the time involved. It will be one of the others most likely, ad could be a compound problem of more than one.
If interested your manual is here:
http://www.managemyhome.com/mmh/lis_...M/L0305004.pdf
Peace,
Clarke