read the above procedure for setting the carb.
first the electrical system must be in top condition: new points, plugs condenser wires rotor button and timing.
then you can start on carb.
my old to-35 idles at 400 rpm's and takes the fuel good under load, that is your goal.
motor must be warmed up before you start the adjustment procedure.
i use non ethanol gas in my tractor (still can buy it in my area)
i also installed a inline fuel filter between the fuel cut off and carb.
I will try to find the info i used to set my carb.
you must know which carb you have before you start.
each tractor model used a different # carb.
example there are many different ms carbs