Carburetor Leak

If when you pulled the rubber hose off the intake of the carburetor and there was not a rush of gasoline from the bottom of the carburetor you didn't have a problem anyway. There is always going to be a small drip from that drain filter copper thingy in the bottom of the intake. That is why it is there. To allow the excess gasoline to drain out.

If the engine starts it will dry up that small residue in short order. If the engine fails to start and there is only that small residue in the intake and not a large volume of gas then you have other problems. Probably ignition or compression.

I always pour about a table spoon of motor oil into each cylinder through the spark plug hole prior to attempting to start any engine that has has the head off. There is always going to be some grit that lodges between the valve face and the seat face and this along with the same stuff on and around the piston rings etc is going to hold everything away from their sealing surfaces until initial start up blows it out the exhaust along with a lot or smoke from the oil you poured into the cylinder to help seal it up so it would be easier to start.

Don't worry! You won't foul the plugs with new oil on them and besides it wasn't my original idea to do it this way. It was taught to me at the Air Force Reciprocating engine school in Witchataw Falls Texas back in 1955 while I was incarcerated by the Federal Government.