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Trouble shooting my Gen.

Discussion in 'Home Power and Microgeneration' started by Saml, Jun 24, 2005.

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  1. Saml

    Saml Guest

    Homelite Generator.LR 4400

    Briggs & Stratton 8 HP. Engine.

    About 5 years old with little use.

    This Generator has gotten me through 2 Power outages from Hurricanes.

    Also helped 2 neighbors with emergency power.

    I start the Gen. about once a month and run it for 15 or so min, under load.

    Yesterday I pulled the cord and gas began to run out of the Air filter.

    I am an old retired guy on fixed income, so if I can fix it myself that
    would be great.

    Any help would be appreciated.


  2. have you tracked the source of the leak? Could it be that some gas
    line rotted?


  3. Vaughn Simon

    Vaughn Simon Guest

    I have seen both the rotted fuel line suggested by Ig and the stuck needle
    valve suggested by fcrumbler. Both are easy to fix.

  4. I had a rotted line on my military surplus powerwasher:

  5. I agree with fcrumpler that a stuck float valve will cause this
    problem. I own an old generator, also with an 8 HP Briggs engine. It
    has a float-type carburetor, and a gravity-feed fuel tank, so a stuck
    float valve will cause a flood of fuel out the air intake. It ALSO has
    a fuel shut-off valve, and if your generator is similar, it should
    also have a shut-off.

    If there is in fact a shut-off valve, simply close it, and start and
    run the generator until it uses up all the fuel in the carburetor bowl
    and stalls. This causes the float to drop to its lowest position. With
    any luck, the piece of debris that held the float valve open will be
    dislodged, or will be washed out by the inrush of fuel once you
    re-open the shut-off valve.

    The above procedure has worked for me with several carbs in
    small-engine and automotive applications. Costs nothing to try it.
    If doing this a couple of times does not clear the problem, you will
    have to disassemble the carb. If it is the updraft style of Briggs
    carb like mine, be sure that you remove the main mixture screw AND the
    long thin brass tube behind it before attempting to remove the float

    Hope this helps,

    Gordon Richmond
  6. Saml

    Saml Guest

    Many thanks for the info, Gordon.

    That is a good Idea and I will try it .

    It looks like my Carb. is held on by two bolts that have what looks like
    male Torx ends on them.

    I have never had this carb. Off, and am wondering if I have to pull these
    two bolts to remove it.

    If so, is there a special tool that I should use?


  7. JoeSixPack

    JoeSixPack Guest

    Chances are, the stuck float will loosen up without disassembly, but the
    problem may re-occur unless overhauled properly. Gasoline can gum up if
    left sitting too long. De-gumming additives could be tried. If the fuel
    line is deteriorated, a replacement piece may be easily attached with
    minimal disassembly.
  8. Vaughn Simon

    Vaughn Simon Guest

    You probably should take this to some small engine board for a better
    answer, someone there may know your specific engine/carb. It is very
    possible that you do not have to take the carb off at all, just remove the
    float bowl and figure out why the float is stuck. There are typically three
    parts in there, a float, a pivit pin and the valve stem itself. It is
    entirely possible that the float is stuck to the bottom of the float chamber
    in some gummy old gas. In that case, a simple cleaning will do the trick.
    In rare cases it can be fixed with just a judicious rap on the side of the
    float bowl.

  9. SteveJ

    SteveJ Guest

    I know the problem, its a
    Briggs & Stratton

  10. Saml

    Saml Guest

    Thanks again everyone, for all the suggestions.
    Will give them a try.

  11. I too have a spare generator with an 11HP Briggs & Stratton engine, and
    since it was new, it always leaked gasolene under the carb. There's an
    opening in the intake manifold with a pourous bronze filter there that leaks
    like a sieve when the generator is stopped. Why the designer chose to put
    this filter on the bottom side, where gravity would cause fuel to lay, is
    beyond me. It's an annoying problem about this particular genset.

    Best Regards,

    Mark A. Weiss, P.E.
  12. Saml

    Saml Guest

    First of all, let me thank everyone that took the time to post possible
    cures for my Gen.

    Each post was appreciated.

    Gen. is back on line, and none too soon, as the Hurricane season approaches.

    Having done the removal of the Carb, and cleaning out the Crud that had
    built up, I will be able to tell anyone how I solved the problem, with the
    help of this NG, and all the good advice posted.

    Thanks again.

  13. Sam,

    I am pleased to hear that you got it running again. One good tip:
    after you have done using it, drain the fuel tank, and run it until it
    consumes all the fuel in the carburetor and quits. That way, you avoid
    having fuel standing in the carb and fuel tank, to slowly evaporate
    and leave behind gummy deposits. If your genset has a fuel shut-off
    valve, there is a product called Sta-Bil which you can add to the fuel
    which retards its deterioration in storage. If you choose to use that,
    add it to the fuel in the quantity indicated on the product container,
    and keep the fuel tank FULL. But I would still close the fuel shutoff
    and run the carb dry.

    Gordon Richmond
  14. m Ransley

    m Ransley Guest

    A sticking float can let in enough gas to completely fill the motor and
    cylinder with gas. Be sure you check your oil, if it is overfull drain
    it as it is contaminated with gas and wont lubricate, you could ruin
    your motor. Best is run tank dry for storage and be sure you have a fuel
    filter, many units dont have a filter. My friends gen would not pull at
    all, he thought it seized, we removed the plug puled the rope and
    gasolene shot out 15 ft, the float stuck and it took 2 changes of oil to
    get all the gas out
  15. Saml

    Saml Guest

    Many thanks for the additional info.
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