Small Engines (Lawn Mowers, etc.): Sears lawn mower idle speed, lawn mover, small engines

Question
I have a craftsman 5.5 HP lawn mover that wouldn't start.  I pulled the carburetor and cleaned it.  I put things back together aging and the good news is that the mower will now start, but the bad news is that it is idling very slowly.  It runs, but the speed of the blade is too slow to effectively cut the grass.  Any idea what I did wrong when I put it tback together?  Is there an adjustment I can make to the idle speed?  There doesn't seen to be a screw to adjust the idle like there was on my last mower

Answer
 Hello Sam:

 I Require the Make and Model Numbers Off of the Engine, Please. There are Many Different Style Carburators Used on Small Engines and the Engine Make and Model will Help me Know Which is Used on your Mower.

 Respectfully

 John