Yamaha Venture - Gas in bottom of hull on hot day (photos)
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  1. #1
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    Yamaha Venture - Gas in bottom of hull on hot day (photos)

    So I've got two '95 Venture 700s. Both have full tanks, but one of them is leaking gas out from what looks like around the black rubber tank top on a hot day and I've got almost 1" of gas on the bottom of the hull. The other is doing fine. What should I be looking for? Is there a clogged vent system? I checked for cracks and clamp tightness, and all seems ok, but gas seems to be leaking from around the black cap with the lines going into it when it's hot outside.

    Is the vent system the blue tube with what looks like a checkvalve on it, between both large rubber caps? From what I've read that is a one-way valve that allows air into the tank, not out. So could it be the rubber top that the lines go into, even though I don't see any cracks?

    VentureGas.jpgVentureGas2.jpgVentureGas3.jpg
    Last edited by super_kev; 09-03-2018 at 01:46 PM.

  2. #2
    PWCToday.com Is My Home Away From Home Grumpy Old Guy's Avatar
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    Re: Yamaha Venture - Gas in bottom of hull on hot day (photos)

    When you take the seats off there are two clear plastic tubes in the rear part where the battery is...one is vent for fuel tank & one is for the battery vent.

    Make sure the 2 vents that are sticking up from the deck are not blocked closed.

  3. #3
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    Re: Yamaha Venture - Gas in bottom of hull on hot day (photos)

    Quote Originally Posted by Grumpy Old Guy View Post
    When you take the seats off there are two clear plastic tubes in the rear part where the battery is...one is vent for fuel tank & one is for the battery vent.

    Make sure the 2 vents that are sticking up from the deck are not blocked closed.
    How do you clean them or check? Or do you just cut them off and put a new vent of some sort on the tube?

  4. #4
    PWCToday.com Is My Home Away From Home
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    Re: Yamaha Venture - Gas in bottom of hull on hot day (photos)

    Just make sure you don't try to start the ski, unless you have already lit a cigarette next to it.
    I'm only here to make you mad



    I'll tell your girl you said "hi".


  5. #5
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    Re: Yamaha Venture - Gas in bottom of hull on hot day (photos)

    So I checked the vent separator "tube" and cleaned it out with brake cleaner (pulled the smaller tubes off, cleaned out the large tube and reseated the lower rubber stopper), but it appeared to be clear to begin with. What else should I look at?
    Last edited by super_kev; 09-03-2018 at 11:58 PM.

  6. #6
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    Re: Yamaha Venture - Gas in bottom of hull on hot day (photos)

    Fill your tank with a little compressed air through your vent line before the check valve. Just a squirt or two from a blower chuck. Sit back and watch for your fuel leak. I would not ride that ski till you fix the problem. You asking to get hurt and blow the ski apart, I've seen it happen.

  7. #7
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    Re: Yamaha Venture - Gas in bottom of hull on hot day (photos)

    True, I won't ride it, I'm not an idiot believe me; I've seen what happens and I won't do it. But I'll try the air trick; so that check valve is a one-way valve into the tank, right?
    Last edited by super_kev; 09-04-2018 at 02:31 PM.

  8. #8
    PWCToday.com Is My Home Away From Home
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    Re: Yamaha Venture - Gas in bottom of hull on hot day (photos)

    Yes. Allows air into the tank, as fuel level drops due to consumption.
    I'm only here to make you mad



    I'll tell your girl you said "hi".


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