Small Engines (Lawn Mowers, etc.): Craftsman mower wont start, throttle plate, throttle lever

Question
I inherited a Craftsman mower with a B&S 6hp engine (12h802-2675e1).
It is about 6 years old and will start and run if you manually hold the carb open while pulling the cord to start.  The cable attached to the lever on the mower's handle runs down to the left side of the mower and will move a pivoting lever but does not do anything to open/close the carb, which is on the other side of the engine.

I can not figure out what switch/lever/device is borken or missing that would open and close the carb.
There is no throttle speed control on this model.
http://www.epinions.com/content_171004956292

Thanks!

Answer
Hi Brian,

The cable that you describe may be for the safety kill switch.  The throttle is usually a lever near the carb.  Your mower may not have a throttle lever but might be factory set to maintain engine mowing speed.  I suspect a missing spring or linkage.  With out seeing it, it is hard to tell you exactly what is missing.  All I can say is to look closely at the carb and follow the throttle plate shaft to see what is connected to it and what might be missing.

Let me know how you make out.
Michael