Interesting to note the previous owners attempt to make smaller
hoses work on the larger fittings. After seeing this, it was no
surprise that I was smelling raw fuel.

I replaced all the hoses with 3/8" fuel line. The check valve in
picture six was stuck shut. A few whacks with a hammer and now it's
working just fine allowing air in only. Now I can fill the tank
without having it bubble up and stop the pump. This allows me to
dump huge quantities of money in the tank even faster!

Also note the labeling on the hose in picture eight.
I'm so glad it's non-toxic.