Re: What does this spring do?

[David Stanton]

The crack in the fuel line has to be big enough to bleed off pressure faster than the motor puts pressure in the tank to affect how it runs, but it will, like you found, leak gas and will only get worse.

Oily and wet spark plugs are the result of too much gas, not gas starvation. Be sure you carb float is working properly if you know your needles are adjusted right. Also check spark plugs to be sure you are running the proper heat range.

Dave