Mike Romain did pass the time by typing:
> Let's try that again.... ;-)
>
> The center outlet of the filter goes to the carb. The return line needs
> to be at the top of the filter on the smaller nipple. The two nipples
> are different sizes.
>
> Then when the carb is full, the gas raises to the top of the filter and
> goes back the return line to the tank so the return line is up top.
>
> This prevents vapor lock also because when you shut it down hot, gas can
> boil in the line which causes the vapor lock and no start like you are
> experiencing.
>
> If the return line is down, then the gas is free to run back to the tank
> which vapor locks it. It will then need two primes of a quarter cup of
> gas for the pump to pick it up if you want to save your battery and
> starter....

Dunno if this applies but in the old rochester 4M4 quadrasuck there
was a fuel filter with built-in check valve right in the carb
Use the one without a check valve and it will drain back to the tank.

--
DougW