Fuel line connectors part numbers on a 1972 mercury 500 50hp?

so, i have been looking everywhere for a fuel line with connectors and primer bulb for my 1972 merc 500. i am hoping somebody has one of these outboard engines and can help me out, i would really appreciate it. and if you do have one of these engines, could you let me know the fuel mixture as well? i appreciate all the help, thanks.