Small Engines (Lawn Mowers, etc.): Briggs carurators, model type, briggs

Question
Simplicity 725
M/N 19 706054
S/N 661961
I would like to get carburetor adjustments for the above tractor / Briggs motor

Answer
what size engine is it and model of carb.  the engine has a plate or is stamped with model, type, code this info or the size and carb numbers determine the adjustments. the tractor numbers dont help they used several different engines on them
each with different specs