Small Engines (Lawn Mowers, etc.): 25cc Craftsman trimmer shutting off, craftsman weed trimmer, fuel mix

Question
I just bought a 25cc Craftsman weed trimmer.  I mixed the fuel correctly, and followed the correct starting procedures.  The trimmer has a "full choke", "half choke", and "run" setting.  Following the procedure in the manual, I pulled several times on full choke, and then it usually starts on the first or second pull at the "half choke" setting.  Regardless of how long I let it run on the half choke, the engine will die after I switch it to the "run" position.  If I play with the throttle, I can keep it running for a while, but it eventually dies out.  I tried adjusting the idle screw, but that didn't make any difference.  I'm hoping this is something I will be able to fix myself...? Would any type of carb adjustment help this problem?  It seems to run fine on the half choke setting, but I if this isn't how it's supposed to work, I'd like to correct the problem.  Any ideas or information would be greatly appreciated.

Answer
 Hello Jason:

 Thr Problem you have is getting to be Common. The Carb is Set too Lean. The Low and High Air/Fuel Mix Screws need to be turned Counter Clockwise 1/4/ turn and it should be fine. Does your Carb have Adjustment for the Air/Fuel Mix. Some have a Red Stop Cap. Some use a Funny looking Screw. If you have the Right Tools you can set the Carb. If not then your local Small Engine Repair Shop can help. Hope this Helps.

 Good Luck

 Respectfully

 John