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  1. #1

    Join Date
    Dec 2005
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    Aberdeen, Maryland
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    Air pressure in fuel tank ?

    Ever since i've had my 1300 as the fuel level goes down when i take the gas cap off i get a hiss of air .. Sometimes enough to push the cap off after its almost all the way removed ! Does anyone have this issue or is it even an issue ?

    thanks


  2. #2

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    Apr 2006
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    panama city beach 'fl
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    close loop system,what ever fuel not need returns to tank/it's ok

    later cd

  3. #3
    ABBOTT's Avatar
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    yes it's just like a 5 gallon gas jug after sitting out in the heat. Pressure builds as your ski is exposed to higher temps (outside) and it relives itslelf.

  4. #4
    spud's Avatar
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    A little pressure is a good thing. If you do not have a little pressure in the tank you need to trouble shoot to seal the system back up. Its usually the one way valve that lets the tank breathe.

  5. #5

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    Dec 2005
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    Aberdeen, Maryland
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    most of the time i get a little hiss or pressure ... it seems the longer it stays closed and the lower the fuel level is the more pressure i have

  6. #6
    spud's Avatar
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    Yup. No pressure and no hiss could = problems

  7. #7
    Moderator RX951's Avatar
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    Most fuels produced today have a high RVP; Reid Vapor Pressure.

    It is a parameter/measure controlled by refineries in the production of gasoline.
    Two important measures for gasoline are the Reid vapor pressure and the octane number.
    Gasoline has to be volatile enough to vaporize and mix with air to burn, but one problem is that the vapor pressure can go up or down with a change in temperature or with altitude.
    If the vapor pressure is too high, a vapor lock can occur and prevent the flow of gasoline.
    If it's too low, the engine might not perform well in cold weather.

    ...in all......Some Pressure is good.


    ........I work in a refinery

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