Kyle there are no adjstments on the mower if it is like one I own. I had one that sat for 10 years and after a through cleaning,replacing needle,float and air cleaner worked for a while. I'll bet it is the jets and carb. that is still the problem and/or the vent hole. Mine were gummed up and once cleaned was OK. Check the carb, clean with choke cleaner and use an air hose. By the way Sears still has parts and mine was 25 years old. Again all is preset(some new BS are that way also).