I recall reading a string from awhile back where people tried and tried to help get a saw running. I think a site member was going to even travel some distance out of his way to take a look at the saw. Turned out the OP, dozens of replies/suggestions later, realized his gas was contaminated with water. Not saying that’s what’s going on here, but I generally dump the fuel into a glass bottle to inspect it as a first measure, when trying to help get something going. Then I replace it with my fuel. Fuel pickup/filter, carb inlet screen, inspection of diaphragms are easy checks as first measures. Best of luck. Carb rebuild gets my vote!