Re: Need some help and advice......
Huh, yeah, one of those lines is a vent line, then.
If the existing tank is below the carb now, I wonder whether having additional fuel pressure from gravity (from a top tank) would cause a flooding problem. I'm not sure how the fuel from the lower tank gets drawn up to the carb on that setup.
Edit: Oh, I know what would happen - if you leave the petcock from the top tank open long enough, fuel will start coming out of the vent tube in the carb. I think you definitely want to use a top tank as a "hot reserve," but not leave the valve between the two open.
Last edited by Nougat; 02-28-2010 at 07:25 PM.