Small Engines (Lawn Mowers, etc.): 24 HP Briggs Stalls after 20 minutes, hp briggs, v twin

Question
I have a 2006 model Husqvarna GTH2448T lawnmower that just started stalling after it runs for about 20 minutes (runs perfectly for the first 20 minutes).  It sputters for 5-10 seconds (like it's starving for fuel) and then stalls.  After letting it cool for about 10-15 minutes, it will restart but will only run for about 5 minutes.  I changed the fuel and air filters to no avail.  I then disconnected the outlet side of the fuel pump after it stalled and it had good pressure to the carb.  I'm stumped.  Is there some type of ignition coil that may be overheating.  I'm guessing that it's something electrical at this point.  It's a 24HP Intek V-Twin OHV.  The sticker on the side reads: 6BSXS.7242VF 276480.  Any help would be greatly appreciated.

Wade

Answer
Hi Wade
The first thing we check would be to see if there is a buildup of rust and/or trash on the flywheel magnet and on the magneto arms. This can cause a loss of spark. Check that out and if that is not what is causing the problem let me know and we can go from there.