Time you took to post this you could have googled it
Kids these days
I think this is a great question. As a person who likes to boondock to out of the way lakes in Canada, I have often wished that my 31FS had a second fuel tank so I could easily transport the fuel for the outboard motor fuel tanks.
2014 Greyhawk 31FS
RV's, Pop-ups, and Tents going back to the 1960's
Scoutmaster, know one guy that said he tied into his generator fuel line and used a hand pump to fill his tank for his outboard when out in the wild. Had to laugh when he said if you don’t do it right it’s a long walk back to civilization.