Posts: 3469
Location: Elk River, Minnesota | Hiya!!
I would disagree with that statement.. all tanks must be vented in order to prevent pressure. Your automobile tank is vented through the gas inlet, as is your tank whether through the fuel inlet or like many tanks, out the side.
If there was no vent, the tank would be building a negative pressure, which would not allow fuel to move from tank to motor.. you would not be able pump a primer bulb. Fuel could not flow because the pressure is not equalized. If it was possible, you'd implode your tank.
All tanks are vented..and if memory serves me, it is by law that they must be.
As for the fuel system being safe, I would disagree with that also. Fuel breaks down because it is always exposed to air whether it be in a tank, transferred from one tank to another, etc. The fuel injected systems don't have a small reservoir holding fuel like a carburetor so it does not have the same tendency to gum up like s carbureted engine does but it still can happen..most likely happening with clogged injectors. Fuel will evaporate and leave a film, which over time, will gum things up regardless of the vehicle is being used/stored.
Many guys run a fuel/water separator on their fuel systems, regardless of type of motor, which is acting as an extra filter system for debris which can and will always get into a tank over time, but this also takes out any water that may be in the tank itself, thus keeping the fuel system a bit more safe from debris and/or water that can cause a myriad of problems with the engine.
Fuel always will break down over time...that is a given as it is always exposed to air, humidity, etc. Hence using a stabilizer to help slow that process down is a huge component to proper maintenance of the fuel system.
Key elements: Always store your engine with stabilized fuel or run it dry. (I'd even push for finishing your engine off if you run it dry with stabilized fuel) Carbed engines should be fogged or oiled of some sort to the cylinders, and even fuel injected engines could use this process as well. Better to play safe than to just run the motor, do nothing, and expect the engine to perform as expected the next year. It is a major reason why many get to the ramp for the first time in spring only to find they cannot get their engine to start or run properly.
Steve
Edited by VMS 1/8/2018 3:03 PM
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