Re: Evinrude Fisherman 6hp fuel line source?
A standard fuel line with primer bulb and OMC fittings should fit your engine and tank. They are "two prong". (see attached picture) One connector, the shorter spring loaded one, is for the fuel. The longer one with the groove cut into it is to lock the hose to the connector. By coincidence, my 2007 Merc 6 HP has a similar connection. My 72 Johnson 6 HP, and 86 9.9 HP Johnson (pictured) has the standard OMC connection.
I have seen these fuel hose assemblies at walmart, West marine, and Defender marine from $10-20.
If for some odd reason, yours got converted to the old dual line pressure tank setup, then you will need to find that line instead, which is not a common thing to find in stores.