Any weed-eater guru's out there?

I have a Poulon Pro 036 weed whacker that I bought about 7 years ago. I used it about 4 times then put it in the shed. I was dumb and didn't drain the gas or add sta-bil. When I took it out this weekend, the gas lines were rotten, so I replaced them and flushed the tank. I checked the plug, and it looks good. I got it started several time, and can get it to run on half-choke, but even after warming up for 5+ minutes, it won't run without choke. Any ideas?