Re: Help with a new project, Please.
You're right, Dan.
Marine fuel line is very specific in type, and it's expensive because of all the tests it has to pass (including the "does it have the word 'marine' stamped on it test") and you won't pass a CG inspection without it.
More to the point, using the right fuel line will add significant safety to your boat. FYI, it's not about vapors leaking out through the line (that's related to some new evaporative emissions requirements) but the marine hose is designed to withstand open flame for a certain amount of time without melting and spilling more fuel into a fire, which is the important thing.
For those of you wondering why you've heard many people recommend use of "ordinary" fuel tubing on boats, there are different standards for above deck and below deck installs. Above deck you get away with a lot more.
In summary, your fuel line, fuel filler hose, and gas tank are not good areas in which to cheap out on a boat rebuild if you value your skin. Just take care and make good measurements, maybe even lay out some cheap tubing to test your line run and measure length before you buy the real stuff.
Erik