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  1. #1
    Kory70's Avatar
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    What is this for? For Polaris Virage Fuel Gas Tank Check Valve

    Do we need it ?
    and what does it do ?

    http://www.ebay.com/itm/Fuel-Gas-Tan...lVLCjt&vxp=mtr


  2. #2
    ripcuda's Avatar
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    Check valves on the fuel tank (and oil tank) are important. They let AIR in and out of the tanks. On the fuel tank, there is 2 of them. One lets air IN as fuel level drops (used by engine). The other let's air OUT when pressure/vapors build in the tank from getting hot or being sloshed around a lot. The oil tank only has 1 that lets air IN as the oil level drops.

    A sticking check valve on a fuel tank (usually the one that lets air IN) can cause the engine to starve for fuel... as a vacuum in the fuel tank overcomes the fuel pump trying to pump it out to the engine. If this happens... and you suspect it... you can open your gas cap and if it sucks in a huge amount of air... and the engine begins running proper again... you likely have a bad check valve.

    Cheers!

  3. #3
    I'D RATHER SWEAT THAN SHIVER hyoctane23's Avatar
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    I don't run check valves on my fuel tank...they get old with age and it is easier to just let the fuel tank vent directly through that rubber grommet on the steering column.

  4. #4

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    Quote Originally Posted by hyoctane23 View Post
    I don't run check valves on my fuel tank...they get old with age and it is easier to just let the fuel tank vent directly through that rubber grommet on the steering column.
    if you don't run check valves you have to up your jetting or you'll run lean the check valves help build pressure to help push the fuel in

  5. #5
    I'D RATHER SWEAT THAN SHIVER hyoctane23's Avatar
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    Maybe I should look into getting those back on my ski..good point.

  6. #6

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    Quote Originally Posted by hyoctane23 View Post
    Maybe I should look into getting those back on my ski..good point.
    you don't need them but i was told if you remove them you should jett up one size

  7. #7
    Kory70's Avatar
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    Thanks very much dear friends

  8. #8
    ripcuda's Avatar
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    Can't speak to removing the check valves... but do not vent the tank into the hull. Dangerous gas fumes/vapors will build up... then add spark... and you might just have a really bad day. Make sure you plumb the vent to the exterior. And without a check-valve... if you roll or submerge the ski... you could get some water in your fuel... just something to consider.

    Cheers!

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