Welcome to JustAnswer, I'm Neal and I am here to assist you. Please feel free to ask follow up questions, it is part of the process.
Poor quality fuel which is a real problem is likely the problem based on you information. See if you can locate some non ethenol fuel in your area I would give it a try. If you have trouble finding some ask at the partss store or ask a lawn maintenance person. A lot of them use non ethenol fuel as the ethanol is hard on lawn equipment.