I have a 10hp tecumseh on a craftsman rear engine rider that is giving me fits.  Right now it will start and idle great with the throttle down on slow.  When I crank it up it runs ragged with black smoke and once it warms up it won't idle down.  I looked at Jamie guy3's post and we share a lot of the same issues with some differences.  I have replaced the governor gear and spool in the motor.  I also rebuilt the carb.  My fuel bowl is metal.  I replaced the needles and gaskets and removed the plugs and cleaned behind them, replacing them with new ones.  I also replaced the white plug below the fuel needle as well as a new needle.  The float is the original with no leaks.  I have a lot of fuel running into the motor and mixing with the oil.  After I rebuilt the carb I set the screws to one turn out from snug.  It will also fluctuate while the mower is engaged and the machine is driving.  I will not maintain a running speed.  thanks.

Was wondering if the admins could create another sticky, one that would help newbies identify transmissions and transaxels by sight.  They could post a listing of various types of transmissions and transaxels with thier corresponding model number and a brief list of the mowers that members or others found them in.