2 year old craftsman 42" deck tractor runs fine for 15 minutes then sputters and dies. Will start, run 2-3 minutes, die again. Leave sit will run for 20 minutes.

Check your exaust hose. Mine came loose inside the engine compartment and it caused the same problem. Would run great for a while, then just die or start sputtering like it was missing or the plugs were bad. After I let it sit for a while it would start up fine, run great for about 15 mins, then have the same problem.

Coil may be bad or gas cap may be causing a vapor lock in the fuel tank

check for spark when it dies you could have a bad coil

Sounds like coil is giving trouble after getting warm poss need to replace coil.

I have been hearing alot of this problem. Well it is gravity flow. I just bought a 2002 lt1000 17 hp without a carb the guy was having the same problem so he sent the carb away to get checked out and low and behold it got lost. He waited the summer to see if it would show up but it did not. He got mad and bought a new bigger one. Any ways i am waiting on a new one. Now in my reading these problems i discovered that the fuel line coming out of the tank to the carb is lower. Might be somthing to look at. JIM

filter maybe very dirty, you may need a new spark plug, you're carberator may have just a spec of debris in it , all things that happened to us also, this man is a wizard with small engines..www.belgiumsmallengine.com

I think that your right. Sounds like your ignition coil witch is most likely located under the the flywheel cover. I know that on some briggs and stratton engines they are actually under the flywheel, just trace the sparkplug wires to know for sure. When the ignition coil beginns to fail they start slowly (spitting and sputtering) and then they get to the point to where they stop firing after getting heated up and adventually quit all together.

your automatic choke is defalting

do you have the right fuel filter? some are for pressure and some are for gravity feed, the pressure type (fuel pump) wont flow the gas correctly. another possibility would be the coil.

Find the fuel air mixture screw and while the mower is running turn so mower almost stops then turn them back till the moter is running smoother.Give it some throtle to see & hear how it is running