If it was me, here's what I'd try. Take the carb completely off, stick something in the fuel line to keep it blocked off. Let it set a while to ensure any excess fuel in the intake has evaporated. Then spray some starting fluid (just a little) into the intake where the carb was and see if it will start up and run for a second. If you have a helper, they can turn the key for you and you can spray the fluid in a little at a time and it may run longer. I've done this many times to see if problem was timing or fuel. Doesn't take long. Just a suggestion.