i really need to know how to set the carb right to were it will run at idle perfectly without dying on me which it seems to be doing i need to adust (not the idle stop screw) the screw that's in the throtle arm kinda like a brass color screw wich controls i think the idle of the engine. i'm getting really confused on how to do this without much of the maneuls help please can some one answer this very soon while i'm still on?