Interesting that you can cure a vacuum leak with a jack? That's one for the books!
How do you know the carb's not getting fuel? A vacuum leak doesn't stop the carb from getting fuel.
Will it start when you prime it?
Wild guesses!
A few simple tests should locate the problem - in a logical order.
Look at the color of the spark at one of the plugs - it should be a thin snappy blue one. Anything else indicates ignition problems.
How do you know the carb's not getting fuel? A vacuum leak doesn't stop the carb from getting fuel.
Will it start when you prime it?
Wild guesses!
A few simple tests should locate the problem - in a logical order.
Look at the color of the spark at one of the plugs - it should be a thin snappy blue one. Anything else indicates ignition problems.