Fuel fill and vent locations...
Are shown in the owner's manual. The optional diesal includes a fuel tank mounted under the helm seat. If you lift the lid, you'll notice a molded in flange that the filler hose attaches to (port, aft of seat lip).Save some time and expense by simply using 6 gallon protable fuel tanks. Two should fit under there. I have a metal one that fits through the seat lid. Haven't tried the newer plastic ones... usually I just use a 3 gallon and only burn 5 gallons or so on a really busy season!For a long trip, a spare gas tank could be easily lashed on the swim ladder platform, too.Fair winds,Tom