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  1. #1

    Default gas coming out of vent when I stop

    I have a 2002 tracker pro 17 buit in tank , vented out the side of the boat near the dash , when I stop it releases gas thru the vent , I bought a check valve but want to install it near the vent opening , but don't know how to get to the hose that runs to the vent ?

  2. #2
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    Default Re: gas coming out of vent when I stop

    Quote Originally Posted by nanferg View Post
    I have a 2002 tracker pro 17 buit in tank , vented out the side of the boat near the dash , when I stop it releases gas thru the vent , I bought a check valve but want to install it near the vent opening , but don't know how to get to the hose that runs to the vent ?
    why not install it where it is easy to get to ? near the through hull vent...in case ya need to service it....
    “Success has many fathers, but failure is an orphan.”
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  3. #3

    Default Re: gas coming out of vent when I stop

    Which way would you install the valve?

    So it doesn't burp out? Then how will it vent when you fill the tank?

    So it doesn't burp in? Then how will it vent when you run the motor?

    If it were me I would clean and/or replace the vent hose and/or deck fitting. Then, calibrate the gas gauge vs. the tank capacity and only fill in the required quantity. Sounds like you are just over-filling the tank.

  4. #4
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    Default Re: gas coming out of vent when I stop

    install it in the 'burp out ' position,... it will only be active if there is a fluid pushing it...
    “Success has many fathers, but failure is an orphan.”
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    1990 Bayliner 2002 Capri Cuddy /125 Force " Breaking Wind "

  5. #5
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    Default Re: gas coming out of vent when I stop

    But then gas can still come out.
    When will people learn that impellers require regular
    replacement and are not drive it till it pukes items?

    1984 Regal Medallion 195
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  6. #6
    Supreme Mariner bruceb58's Avatar
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    Default Re: gas coming out of vent when I stop

    Does this only happen when the tank is nearly full? If so, that is pretty normal. If it doesn't do it with it full, you have a vent hose routing problem. No need to band-aid the real problem.
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  7. #7
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    Default Re: gas coming out of vent when I stop

    Do not install a check valve in a fuel vent line!!!! Ever!!!! They make special traps to prevent fluid release from overfill. You need to find out what is wrong. Does this only happen for a little while after you fuel, or does it do it all the time? If it only happens after refueling, then you are overfilling the tank. They make all sorts of noise devices and other crap to make you pay attention to the fuel level when refueling. If it happens all the time something is wrong and you have a problem to fix.

    Fuel whistle:

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    Edit: Regardless of the reason, you are in for some serious fines if law enforcement sees fuel come out of your vent fitting. Stop overfilling/fix problem before you dump any more gas in our water or get yourself a hefty fine.

  8. #8

    Default Re: gas coming out of vent when I stop

    It happens with a quarter of a tank , If you fill it with a check valve installed I would assume the gas would breath thru the gas cap . I don't know what would cause this , this was a fix ftom tracker bass pro . but it shows the check valve mounted in kine on the 45 degree rise to the vent outlet, I would assume that would be to keep any gas pressure from shutting off the check valve .

  9. #9
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    Default Re: gas coming out of vent when I stop

    Quote Originally Posted by nanferg View Post
    It happens with a quarter of a tank , If you fill it with a check valve installed I would assume the gas would breath thru the gas cap . I don't know what would cause this , this was a fix ftom tracker bass pro . but it shows the check valve mounted in kine on the 45 degree rise to the vent outlet, I would assume that would be to keep any gas pressure from shutting off the check valve .
    If it happens with a quarter tank you have a problem that needs to be fixed. Whether it is the factory's fault or not is irrelevant at this point. The vent may need to be re-routed or the location of it changed. Vacuum is just as dangerous as pressure. It will not vent from the cap. The cap on our family pontoon boat vents, but that is because it is a combination fill/vent assembly. Installing a check valve so that fuel may not pass through the vent will cause the tank to positive pressurize, leak, and possibly rupture. Installing it the other way will cause it to collapse, possibly rupture, and possibly leak once the vacuum is released. Both scenarios are bad situations and possibly very dangerous. Gasoline is serious stuff, especially on a boat. We become complacent around it because we are exposed to it so regularly. Fix this problem right before it fixes you.

  10. #10
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    Default Re: gas coming out of vent when I stop

    dont get all jiggy.
    there is a liquid check valve made to aid in preventing liquid from being discharged from the vent.
    wont be long most lakes will require closed systems anyway.
    my seapro also has the tank fill thats vented into the fill. its the only thing I will use anymore.
    its not uncommon to vent fuel when filling,see it a lot.
    there is a stick on bucket that can catch and hold about a quart of fuel. uses a suction cup to stick on and you remove it after filling.
    its also why any hull manufatured after jan 01 2010 must have a closed fuel vent system like cars have had for 30 years or so.

  11. #11
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    Default Re: gas coming out of vent when I stop

    Quote Originally Posted by rodbolt View Post
    dont get all jiggy.
    there is a liquid check valve made to aid in preventing liquid from being discharged from the vent.
    wont be long most lakes will require closed systems anyway.
    my seapro also has the tank fill thats vented into the fill. its the only thing I will use anymore.
    its not uncommon to vent fuel when filling,see it a lot.
    there is a stick on bucket that can catch and hold about a quart of fuel. uses a suction cup to stick on and you remove it after filling.
    its also why any hull manufatured after jan 01 2010 must have a closed fuel vent system like cars have had for 30 years or so.
    The check valve you speak of is designed to prevent fluid discharge from over filling the tank, not repair poor fuel vent routing. The OP has an actual problem that needs to be fixed.

    Uncommon or not, spilling gas while fueling is 100% preventable, should not be tolerated, and there is darn good reason the fine is so expensive.

    The reason for the closed system (evaporative emission controls) is to trap fuel vapor from escaping to the atmosphere EDIT
    Last edited by ezmobee; June 8th, 2010 at 11:06 AM. Reason: insult removed

  12. #12

    Default Re: gas coming out of vent when I stop

    This is why I wrote in on this site ,because I want it fixed I really don't need to be called lazy ,threatoned with fines , and so on . My intention is to fix it , if you can't help in how to repair ,1 post will be enough to express your concerns .

  13. #13
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    Default Re: gas coming out of vent when I stop

    At first it sounded like you didn't have a high-enough swan neck on the vent tube. But if it' doing it at a quater of the tank, it maybe something else, perhaps the way the vent is attached to the tank.

    Simplest modification is to bypass the through hull vent completely, and install a vented cap.
    A man of constant boat tinkering.

  14. #14
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    Default Re: gas coming out of vent when I stop

    Quote Originally Posted by Home Cookin' View Post
    At first it sounded like you didn't have a high-enough swan neck on the vent tube. But if it' doing it at a quater of the tank, it maybe something else, perhaps the way the vent is attached to the tank.

    Simplest modification is to bypass the through hull vent completely, and install a vented cap.
    The vented caps still use the vent line. They just combine the fill and vent into one housing. Unfortunately this won't fix the problem.

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    Default Re: gas coming out of vent when I stop

    It might if the top of the vent needs to be raised; his is "vented out the side" and in a low freeboard boat that can be close to the top of the tank. I've been there.
    A man of constant boat tinkering.

  16. #16
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    Default Re: gas coming out of vent when I stop

    I agree with the OP. I joined this forum because I am new to boating and thought I could meet some very knowledgeable and friendly people, but a lot of my posts end up with someone continually telling me I am just wrong and not offering advice. I am so sorry sometimes that I even ask for help, due to the responses I get. I am POSITIVE he does not want to pollute any water with his fuel, actually I am having the same problem right now and was directed here for some answers, all I 've learned is not to mention that I may have put some fuel in the water, I too do not want this to happen.....I want some help to stop this. If you cant or wont help please don't respond.... Its no help to us with a problem. I do not mean to offend, just point out that criticizing is no help.

  17. #17
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    Default Re: gas coming out of vent when I stop

    Thread is over 2 years old.
    Bob
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