Why will my homelite trimmer not start?

I have a Homelite St-385 string trimmer, with a Walbro carburetor on it, 2 stroke engine, and no matter what I do, it will not even attempt to fire. I pull and pull and pull, and it wont fire. It had a good bright blue spark, just replaced spark plug. I replaced the diaphragm and gaskets on the carb, and cleaned it up. When I take out the plug after trying it several times, it's saturated with gas, and I don't know why. It's like it's trying to run extremely lean. The compression is a little low on it, 100psi, but it should still attempt to fire with that much compression. Any suggestions? Thank you!