Gasoline expands in volume as it warms up and shrinks in volume as it cools down.

Pontoon boat gas tank vent. The fuel tank vent is located on the outside of the boat normally relatively close to the fill port on the gunwale of the boat. Finally an equilibrium is reached and it just quits as does your engine. Also you cannot fill these tanks completely as they have an air gap purposely designed in them to allow for expansion.

Shop our site and save. This introduced pollution into the water and air. Marine Boat Gas Tank Vent 90Stainless Steel Marine Boat Flush Mount Fuel Gas Tank Vent for 58 Hose 1794 17.

If you do not open the vent your motor will experience a vacuum lock. During storage the vent must be kept closed to prevent evaporation and loss of your fuel as well as to prevent dangerous fumes from escaping which could cause an explosion. The vent on your gas tank is necessary to prevent a vacuum block which would prevent fuel from being pumped from the tank to your motor.

Moeller EPA Portable Plastic 6-Gallon Fuel Tank. 58 Fuel Vent Hose per foot. There is the filler tube the pickup tube and the sending unit.

Only Neoprene rubber 5200 screws and that. 200 coupon applied at checkout Save 200 with coupon. With the hole facing towards the sky allowing water to get into it.

We strive to give you the best choice of the most popular fuel system parts in order to make it easy for you to get back on the water. Close the manual vent after you have finished filling the tank. We carry boat water deck fills gas deck fills marine plastic fill caps waste deck fills keyless fills and motor oil fills for boats and RVs from Perko Attwood Gem Lux Southco Sea Dog TH Marine and many more top brands.