it didnt say in your original post, so I'll mention this first. You said it fires briefly when spraying starting fluid or some other combustible into the carb, then dies right? One question about the fuel...is it new fuel, or the stuff that was in it when you got it? If its old, Id flush it all out and try start over with a clean mix.
If the fuel is good because you know the mix is right, and its not been sitting for a long time, then Id suggest replacing the whole carb. If its starting briefly with the starter fluid (or whatever you used), it sounds like a carb probelm or fuel delivery problem still.
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