Any opening in gasoline fuel tanks must be on the topmost surface of the tank.
Boat fuel tank vent system.
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Siphoning from the engine lines but if it s jammed up clogged stuck fuel won t go the other way either.
For safety reasons opening the vent should be done off the boat on a level surface with good air circulation in the area and no ignition source present even cell phones.
Keep your boat s fuel vent screen clean.
The fuel inlet the fuel tank vent the opening for the level gauge and the opening for the pick up must all be on the topmost surface of the tank.
A typical vent line will run sideways across the top of the tank until it reaches the hull side and then angle upward to the vent fitting.
The system also needs to be designed to prevent the defeat of the tank ventilation system when parking a trailered boat on a steep hill when fuel in the tank might back up into the vent hose.
If the tank is sucked in opening the vent will allow air into the tank to equalize the pressure.
Since 1968 west marine has grown to over 250 local stores with knowledgeable associates happy to assist.
Drains are not allowed on gasoline tanks.
Fuel vents marine gas system accessories how tos marine fuel safety the basis for the new epa regulations is to control emissions and this is being accomplished by reducing evaporative emissions from fuel systems.
When you open the vent on an expanded tank fuel vapors will escape.
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Seachoice thru hull fuel tank vent 90 degree chrome plated brass.
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The vent does 2 things let s fumes go helps regulate the fuel flow preventing starvation as you identified the anti siphon valve stops fuel from sucking back towards tank.
The hose should run as straight as possible at this point in a manner that allows any fuel to drain back into the tank via gravity.
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Nrc xrc 316stainless steel marine grade boat fuel vent universal 90 boat flush mount fuel gas tank vent for 5 8 hose with mounting gasket hardware fitting 4 4 out of 5 stars 9 15 77 15.
However by closing the fuel system there s a risk of over pressurization as it is no longer breathing as systems did in the past.
