Ryobi 30 Cubic Centimeter Gas Brush Cutter "ss30 staying running" Questions

...SS30 won't stay running It starts up great, but as soon as the throttle is put into run it dies out, always starts right back up can be your plue I had this problem and it drove me crazy with 2 ...

...running. I only see one screw for the carb but it dont seem like it adjusts anything. I have turned the screw all the way in and out doesnt fix anything. i do not have an air filter in it. could that ...