I wish I could say, "you need to do this and your problem will be solved" and the 'this' would be something that a non-small engine mechanic could do.
But it just doesn't work that way. Your problem probably resides in your carburetor and removing, disassembling, cleaning re-assembling and re-installing a small engine carburetor is 'small engine mechanic' work, which requires the right tools, knowledge and experience to do the job.
You can try youtube to see if you can find something on carburetor overhaul for your engine and see if it's something you feel up to tackling. Some replacement carburetors can be bought dirt cheap (usually China knock-offs) but others can be quite expensive or not available at all.
Taking it to a good, local mechanic may be your best option.
