That is the Tank Vent isn't it? Apologies for any confusion. I am trying to wrap my head around this one.
The gas cap will vent fumes and intake air to keep tank pressure nominal.
The overflow (#11) will overflow liquid if the level is too high.
Got your head wrapped right?
Cheers, and my head is on a one day at a time with this one!
I will post when I have changed it out and let you know how it goes.
https://youtu.be/MtlKr3vVWEo
This is the link, let me know what you think...