Tecumseh carbs have some known issues with clogging jets and stuck ball checks. This can happen even though carb was run dry before long term storage.
I have had luck getting these problem carbs to operate by priming engine with gas (not starting ether) in plug hole. Crank it up and when starts and begins to stall, choke it heavily. Do this repeatedly until it continues to run on its own. This may take several attempts and usually works for me. Let us know.