Idle screw is turned In? Open up L screw (CCW) to 2 turns and re-try.
Did you open and clean the carb? Check carb diaphragms? - If that is new to you, just get a new carb. A rebuild kit is $4-$6, while a new clone carb is $10 shipped from China or $15 shipped from USA.
I've bought dozens from Huztl and had good luck.
http://www.ebay.com/itm/Carburetor-...060092?hash=item43ee5fbb3c:g:P8wAAOSwvU5XNWWT
I did not clean the carb (lack of carb cleaner). I'll pick up a couple cans tomorrow. I was considering getting an entire new carb. The small savings to rebuild isn't worth the time for me.