Lawn mower Dies after a few minutes?

Discussion in 'Home Repair' started by lbbss, Oct 6, 2008.

  1. lbbss

    lbbss Guest

    My lawn mower (Craftsman 6hp) starts fine and works for a bit but then
    starts dying. After trying this for a few times, then I have a
    harder time to start it. When I prime it and keep trying to start
    it, I check the spark plug and it is not wet from fuel, so maybe there
    is a fuel problem. I left it out side covered, but water might have
    gotten in anyways. So I drain all the fuel and drained the
    carburetor pan from fuel. There was no water in the fuel. I put
    new fuel, check the spark plug too.
    The only other thing that I can think of is that 3 months ago, I
    did hit something hard with the blade. It was making a slightly
    different engine noise for a month or so, but eventually sounded
    normal I think. Any ideas what else I could try?
     
    lbbss, Oct 6, 2008
    #1
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  2. lbbss

    zxcvbob Guest

    lbbss wrote:
    > My lawn mower (Craftsman 6hp) starts fine and works for a bit but then
    > starts dying. After trying this for a few times, then I have a
    > harder time to start it. When I prime it and keep trying to start
    > it, I check the spark plug and it is not wet from fuel, so maybe there
    > is a fuel problem. I left it out side covered, but water might have
    > gotten in anyways. So I drain all the fuel and drained the
    > carburetor pan from fuel. There was no water in the fuel. I put
    > new fuel, check the spark plug too.
    > The only other thing that I can think of is that 3 months ago, I
    > did hit something hard with the blade. It was making a slightly
    > different engine noise for a month or so, but eventually sounded
    > normal I think. Any ideas what else I could try?



    It could be the flywheel sheer pin. Until you mentioned that ran over a
    shovel thing (or was it a rake this time?) I was gonna say the carb is
    gummed up.

    If it's running too lean, you might try wrapping the air cleaner element
    with a damp paper towel to choke down the air supply.

    But check the flywheel pin; that's cheap and easy.

    Bob
     
    zxcvbob, Oct 6, 2008
    #2
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  3. lbbss

    LouB Guest

    lbbss wrote:
    > My lawn mower (Craftsman 6hp) starts fine and works for a bit but then
    > starts dying. After trying this for a few times, then I have a
    > harder time to start it. When I prime it and keep trying to start
    > it, I check the spark plug and it is not wet from fuel, so maybe there
    > is a fuel problem. I left it out side covered, but water might have
    > gotten in anyways. So I drain all the fuel and drained the
    > carburetor pan from fuel. There was no water in the fuel. I put
    > new fuel, check the spark plug too.
    > The only other thing that I can think of is that 3 months ago, I
    > did hit something hard with the blade. It was making a slightly
    > different engine noise for a month or so, but eventually sounded
    > normal I think. Any ideas what else I could try?


    You have removed and cleaned the air filter??

    Lou
     
    LouB, Oct 6, 2008
    #3
  4. lbbss

    ransley Guest

    On Oct 5, 9:49 pm, lbbss <> wrote:
    > My lawn mower (Craftsman 6hp) starts fine and works for a bit but then
    > starts dying.   After trying this for a few times, then I have a
    > harder time to start it.    When I prime it and keep trying to start
    > it, I check the spark plug and it is not wet from fuel, so maybe there
    > is a fuel problem.   I left it out side covered, but water might have
    > gotten in anyways.    So I drain all the fuel and drained the
    > carburetor pan from fuel.   There was no water in the fuel.   I put
    > new fuel, check the spark plug too.
    >      The only other thing that I can think of is that 3 months ago,I
    > did hit something hard with the blade.   It was making a slightly
    > different engine noise for a month or so, but eventually sounded
    > normal I think.    Any ideas what else I could try?


    Its fuel or electrical, 2 minutes indicates when the carb is empty it
    dies so a fuel passage or float, does it start whan you force gas in
    by priming, then its fuel related. if more then a few minutes it could
    be the ignition module, see if you get spark after it dies, probably
    need a carb rebuild
     
    ransley, Oct 6, 2008
    #4
  5. lbbss

    lbbss Guest

    yes put a new air filter.




    > You have removed and cleaned the air filter??
    >
    > Lou
     
    lbbss, Oct 6, 2008
    #5
  6. lbbss

    lbbss Guest

    Gas lawnmower. I tried starting it today again it was difficult.
    When I prime it I can smell the gas, I even see some in the air
    filter. But after pulling the rope many times to try to start it, I
    would expect to see a wet spark plug, but mine is always dry. Last
    time when I unscrewed the bottom of the carb pan, there was gas is the
    small metal pan. Maybe the problem is past that area? Thanks.


    > Its fuel or electrical, 2 minutes indicates when the carb is empty it
    > dies so a fuel passage or float, does it start whan you force gas in
    > by priming, then its fuel related. if more then a few minutes it could
    > be the ignition module, see if you get spark after it dies, probably
    > need a carb rebuild
     
    lbbss, Oct 6, 2008
    #6
  7. lbbss

    TWayne Guest

    Gravity fed fuel or a pulse-pump to feed fuel? Sounds like the carb
    bowl goes empty. I'd remove it and watch the fuel flow for say a cup of
    gas; is it a consistant flow or is it slow, just a drip?

    Dry plug says no fuel; Next is carb in the line. Then the fuel filter;
    those plug easily. Then the fuel tank, usually with a screen over the
    output, inside the tank. Tank could need cleaning, could be a plugged
    fuel filter, fuel not getting to carb, carb plugged or jets plugged.
    Not much more in the ckt.

    This could well be nothing but a plugged fuel filter; changed it too?


    > Gas lawnmower. I tried starting it today again it was difficult.
    > When I prime it I can smell the gas, I even see some in the air
    > filter. But after pulling the rope many times to try to start it, I
    > would expect to see a wet spark plug, but mine is always dry. Last
    > time when I unscrewed the bottom of the carb pan, there was gas is the
    > small metal pan. Maybe the problem is past that area? Thanks.
    >
    >
    >> Its fuel or electrical, 2 minutes indicates when the carb is empty it
    >> dies so a fuel passage or float, does it start whan you force gas in
    >> by priming, then its fuel related. if more then a few minutes it
    >> could be the ignition module, see if you get spark after it dies,
    >> probably need a carb rebuild
     
    TWayne, Oct 6, 2008
    #7
  8. lbbss

    Rich256 Guest

    On Oct 6, 8:24 am, lbbss <> wrote:
    > Gas  lawnmower.    I tried starting it today again it was difficult..
    > When I prime it I can smell the gas, I even see some in the air
    > filter.  But after pulling the rope many times to try to start it, I
    > would expect to see a wet spark plug, but mine is always dry.    Last
    > time when I unscrewed the bottom of the carb pan, there was gas is the
    > small metal pan.    Maybe the problem is past that area?   Thanks.
    >
    >
    >
    > > Its fuel or electrical, 2 minutes indicates when the carb is empty it
    > > dies so a fuel passage or float, does it start whan you force gas in
    > > by priming, then its fuel related. if more then a few minutes it could
    > > be the ignition module, see if you get spark after it dies, probably
    > > need a carb rebuild- Hide quoted text -

    >
    > - Show quoted text


    As someone asked earlier, diid you check the flywheel pin? it may be
    sheared just a tiny bit.
     
    Rich256, Oct 6, 2008
    #8
  9. lbbss

    lilo Guest

    Kind of a longshot but check your blade. This same type of problem happened
    with my Craftsman. The blade was out of tightness due to hitting a wooden
    post. It sheared the little knobby things that hold the blade tight and it
    caused a tough time starting..



    "lbbss" <> wrote in message
    news:...
    > yes put a new air filter.
    >
    >
    >
    >
    >> You have removed and cleaned the air filter??
    >>
    >> Lou

    >
     
    lilo, Oct 6, 2008
    #9
  10. lbbss

    lbbss Guest

    would fly wheel pin prevent gas from getting to the spark plug?
    Because that is definitely a problem, I keep priming and pulling and
    then check the spark plug and it is dry as dry can be.
     
    lbbss, Oct 7, 2008
    #10
  11. lbbss

    lbbss Guest

    would that prevent gas from getting to the spark plug? Because that
    is definitely a problem, I keep priming and pulling and then check the
    spark plug and it is dry as dry can be. And would that explain why
    it would dry all of a sudden after it starts?
     
    lbbss, Oct 7, 2008
    #11
  12. I've seen on Tecumsehs, sometimes gasket between the carb and the engine
    dries out. Might have to remove the carb, put a dab of Permatex #2 non
    hardening gasket crap on the both sides of the gasket, and bolt er back on.

    --
    Christopher A. Young
    Learn more about Jesus
    www.lds.org
    ..


    "lbbss" <> wrote in message
    news:...
    Gas lawnmower. I tried starting it today again it was difficult.
    When I prime it I can smell the gas, I even see some in the air
    filter. But after pulling the rope many times to try to start it, I
    would expect to see a wet spark plug, but mine is always dry. Last
    time when I unscrewed the bottom of the carb pan, there was gas is the
    small metal pan. Maybe the problem is past that area? Thanks.


    > Its fuel or electrical, 2 minutes indicates when the carb is empty it
    > dies so a fuel passage or float, does it start whan you force gas in
    > by priming, then its fuel related. if more then a few minutes it could
    > be the ignition module, see if you get spark after it dies, probably
    > need a carb rebuild
     
    Stormin Mormon, Oct 7, 2008
    #12
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