Many boats will have a 6 gallon tank or two 6 gallon tanks.
Gas tank for a pontoon boat. Polyethylene Plastic or Aluminum. Topside tanks are manufactured from a sturdy high-density polyethylene with UV-stabilized resin and feature a withdrawal elbow that rotates 360 mechanical direct sight gauge and a mechanically vented fuel cap that floats. ABOVE DECK FUEL TANKS are specifically designed for use in Boston Whalers Carolina Skiff and Key West bench style center console pontoon deck and jon boat designs.
The type of motor mounted on your pontoon boat will determine what type of fuel it needs. Thus to complete a distance of 100km the boat will need 2777 liters of gas. Leave the gas tank open to allow excess moisture to evaporate.
Pontoon boats that are fitted with normal outboard motors will use regular unleaded petrol gasoline. For example you might be able to fit a battery and a tall thin tank behind the playpen I call it the fence if it were moved only one foot forward. Moeller Marine Fuel Tank 40 Gal 26L x 205W x 2175H.
Whether you need a fuel filter a fuel pickup tube a funnel for pouring a portable fuel tank a complete fuel line assembly hoses and connectors senders and gauges a replacement tank fuel additives gas caps and deck fills or just a 14 gallon jerry can by Flo-N-Go. So say the boat owner was planning a trip of 100km then they would simply divide 100km by the 36 kmliter rating to get 2777 liters per 100km. Second perhaps you could go with different gas tank with a shape better suited to where you want to put it.
There is the filler tube the pickup tube and the sending unit. The farther forward you put it as you plane up assuming you can itll be less of a drag issue. Regular unleaded gas used for pontoon boats will usually have ethanol included in it to protect the engine.
Different pontoon boats have different sized gas tanks. Save 10 off 99 or 15 off 99 GSM. Plastic marine fuel tanks are much lighter and less expensive.