PHP Warning: Use of undefined constant VBA_SCRIPT - assumed 'VBA_SCRIPT' (this will throw an Error in a future version of PHP) in ..../includes/functions_navigation.php(802) : eval()'d code on line 1 Closing fuel tank vent when not in use?
Should I fit valves and close off the vents when not in use?
I have a 220L aluminium tank in my alloy boat. It has 2 vents mounted on the transom. My shed smells of fuel all the time. Also wondering if this may help reduce fuel loss from evaporation.
I keep the tank full with fuel stabiliser added to keep it fresh.
Something going on there Darren. No issues in my shed at all with fuel smell. I don't top up unless I am fishing the next day and have never used fuel stabilizers either. Is there a chance the breather is having fuel pushed out it due to boat angle?
agree, must be topping up to the max and expansion of fuel is rising up the breather...dont seal it off, its needs to breathe. would this fuel additive change and expand as well due to atmospheric pressures, as ived never used the stuff in my life.
Meant where it exits the tank but if you have two chances are one fore and aft . Check them both to make sure there are no blockages. It is surprising how much an air pocket can expand on a hot day. If the breathers end up below fuel level and there is still an air pocket above them, it will expand and push fuel out very easily. You could look at fitting an expansion chamber if you do end up figuring out fuel is coming out the breathers. Like I posted - I wouldn't block it - but it's your tank.
With the tank full the heat expands the fuel & pushes the fumes out the breathers & makes a petrol smell If you get it full enough it will push out fuel
if i filled my 150 liter tank full up to the fill port it would push fuel out the breathers , its a open system it just happens
so i just didnt fill it full
breathers should have a loop in the system
also fuel cans drums are designed to hold some pressure with ribs or pressings on the containers
i doubt boat manufacturers put that much thought into their tanks
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