Technical aspects of automobiles

gas draining from carburetor drain hose

yes, I know that’s what it’s for). Started running very rough,
 missing, won’t idle. When stopped, gas drains from carb drain hose.
 doesn’t drain while engine running. shut gas off and stops draining.
 with gas off, will drain if drain screw opened (so gas in bowl). will
 drain with drain screw closed if gas is on. starts easily. what the
 heck is going on??

.
posted by admin in Без рубрики and have Comments (5)

5 Responses to “gas draining from carburetor drain hose”

  1. admin says:

    jefrals…@gmail.com wrote:
    > yes, I know that’s what it’s for). Started running very rough,
    >  missing, won’t idle. When stopped, gas drains from carb drain hose.
    >  doesn’t drain while engine running. shut gas off and stops draining.
    >  with gas off, will drain if drain screw opened (so gas in bowl). will
    >  drain with drain screw closed if gas is on. starts easily. what the
    >  heck is going on??

    With your post’s total lack of pertinent information I can only guess
    that you are describing a carb with a stuck or "sinking" float.

    Make, Model, Year, Engine, and some kind of helpful description of your
    carb (manufacturer maybe?) may help someone give you a meaningful
    answer/solution to your problem.

    Good Luck

  2. admin says:

    - Hide quoted text — Show quoted text -

    anumber1 wrote:
    > jefrals…@gmail.com wrote:
    > > yes, I know that’s what it’s for). Started running very rough,
    > >  missing, won’t idle. When stopped, gas drains from carb drain hose.
    > >  doesn’t drain while engine running. shut gas off and stops draining.
    > >  with gas off, will drain if drain screw opened (so gas in bowl). will
    > >  drain with drain screw closed if gas is on. starts easily. what the
    > >  heck is going on??

    > With your post’s total lack of pertinent information I can only guess
    > that you are describing a carb with a stuck or "sinking" float.

    > Make, Model, Year, Engine, and some kind of helpful description of your
    > carb (manufacturer maybe?) may help someone give you a meaningful
    > answer/solution to your problem.

    > Good Luck

    It’s a trick question. He posted the same question in the motorcycle
    group and they told him he was confused too. Maybe he’s inhaling too
    many of those gas fumes. It could even be a lawnmower or an ATV. Who
    knows!

  3. admin says:

    anumber1,
    You were right, it was a stuck float valve, probably some crud in the
    gas. I am puzzled, though.  If the float valve is what stops gas from
    running into the carb, and gas is running into the carb, then what else
    would it be besides a float valve not closing? How does Make, Model,
    Year, Engine, etc change any of that?

  4. admin says:

    jefrals…@gmail.com wrote:

    > anumber1,
    > You were right, it was a stuck float valve, probably some crud in the
    > gas. I am puzzled, though.  If the float valve is what stops gas from
    > running into the carb, and gas is running into the carb, then what else
    > would it be besides a float valve not closing? How does Make, Model,
    > Year, Engine, etc change any of that?

            Your right it doesn’t. The obvious solution to your problem  was the
    float. Modern cars don’t have floats, so you must not have one those.
    Your mention of carb drain hose and drain screw suggest and That it
    "starts easily" indicates an updraft carburetor. There hasn’t been a car
    built with one of those in 60 years. So one might guess you are talking
    about a very old car or an old tractor or riding lawn mower.
            That’s if your statements can be believed, but this is usenet and one
    can only guess if the poster is  on the level or just spouting some
    nonsense he read somewhere else on the web. If you really want help it
    pays not to be to cryptic.

    -jim

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  5. admin says:

    jefrals…@gmail.com wrote:
    > anumber1,
    > You were right, it was a stuck float valve, probably some crud in the
    > gas. I am puzzled, though.  If the float valve is what stops gas from
    > running into the carb, and gas is running into the carb, then what else
    > would it be besides a float valve not closing? How does Make, Model,
    > Year, Engine, etc change any of that?

    Well, for one thing my answer was a total stab in the dark.

    Some mid to late 80′s cars have electric fuel pumps and pressure
    regulators feeding the carb. Too much fuel pressure can and will force
    the needle valve off the seat and cause a carb’s float bowl to overflow
    through the vent.

    I have had more than one Rodchester Q-jet with worn throttle shaft
    bushings leak fuel from the throttle shafts also.

    With more information in your original question, you would have gotten
    less of a guess and more of an informed answer.

    Then again if you were just trolling anyway…you got one…

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