Probably a varnished main jet, not the primer. Your jet looks like one of these. Remove it, clean it thoroughly and try again. If that doesn't work, I can supply more detailed instructions.

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Likely had remnants of old fuel in the carb which gummed up the small holes in the bowl nut. Be sure all the old fuel is flushed out of the system, clean at least the bowl nut passages if not the whole carb. Meaning that if you are unsure of doing carb cleaning, you may be able to get away with removing the the nut only, running some fuel through and cleaning the nut. If it doesn't work out, you could go further. I think Bayme posts some pics from time to time in this forum that would help as Tecumsehs have an additional tiny hole that gets missed sometimes.