I did not pull my old hose out so I could use the old one like a snake to pull the new one through with.
It took two guys one pushing and the other pulling I went in from the gas fill side and pulled to the tank side. You could use the same approach with a smaller hose first and use a plastic fitting to attach the two together.
Doing it this way prevents you from putting in a access hole in your boat.
FellowShip
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Just for the Grins
Official 23’ SF Antique Classic SeaCraft Owner