The machine was working fine while mowing leaves and then just died.  Ever since then, it will idle and nothing else.  I have rebuilt the carb a few times with no change in the engine performance.  Bowl is full of fuel when I remove the solenoid, so I don't think it is pump/lines/etc.  What should I look at next?
 
Thanks.

Try spraying carb cleaner down the throat of the carb when opening the throttle.
 
We're checking to see of it's a fueling issue..
 
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Well, I figured it out.  Turns out the fuel shutoff solenoid only cuts of fuel to the high speed jet and not also the idle jet.  I tested the solenoid on the bench and nothing.  I then pulled the plunger and spring from it (to disable it) and reinstalled it.  Machine runs great.  New solenoid ordered.