Weed Eater Motor Flooding

Discussion in 'General Questions' started by codi79, Mar 30, 2008.

  1. codi79

    codi79 Member

    I've got a Weed Eater motor, around 20cc and when I start it up I give it some gas it'll stall on me soon later. Also if I start it up and don't touch the throttle it'll stall too. So it seams that if I give it some gas it stalls on me and if I don't give it any gas it makes no difference, it still stalls. I'm not sure where to start and i figured someone could lead me in the right direction.

  2. Alaskavan

    Alaskavan Guest

    I trust you've pulled the air cleaner?
  3. codi79

    codi79 Member

    Yes, I've removed the air cleaner.
  4. Alaskavan

    Alaskavan Guest

    I'm afraid I can't help. Right now I don't know enough about these motors. I have a bunch of weedeaters that I intend to put on bikes, but right now my knowledge is limited.
  5. hot70cc

    hot70cc Guest

    Does the carb have H-L screws??? If so Turn both screws all the way in , then turn the low screw 1 full turn out then the high screw 1/2 turn out. It worked for me, hope this works for you.
  6. codi79

    codi79 Member

    Well I know it has a H (high) screw and it has an idle screw. Is the idle screw the L (low)?

  7. codi79

    codi79 Member

    Most of the time even if im not even touching the throttle the motor will rev really high and then bog down and stall.
  8. RdKryton

    RdKryton Active Member

    Sounds to me like the carb may be loose. Just make sure everything is tight. Just a thought.

  9. hot70cc

    hot70cc Guest

    The H and L Screw screw is not for IDLE. There should be a seperate screw for that, look at the end of your throttle cable. It is attached to a lever. The lever is spring loaded, Now when the lever springs back it hits the ( IDLE Screw ). Post a pic of your Carb if you can. More than likely the screws got moved from stock. Once i fiddled with my screws(made about 4 adjustments) then got it to go smooth without bogging down when i gave it full throttle. Does this help> http://www.motoredbikes.com/showthread.php?t=8498
  10. codi79

    codi79 Member

    Okay there is only one screw, not sure whether or not its the H or L . There is also an idle screw that meets up with the throttle. Im not sure if the one screw is the H or L. It has L on one side and H on the other. Take a look at the pic.

    Attached Files:

    Last edited: Apr 5, 2008
  11. sparky

    sparky Active Member

    That's prolly just the idle screw. Turn it towards L, & try cranking it to see if it'll still rev as high.

    I'll admit I don't have the greatest 2-stroke knowledge, but I don't see what it could be other than a leaky intake. I'd like to know what the problem is, tho.

    Perhaps some of the links under the "Advanced Maintenance, Repair, & Tuning" for carburetor section will help you figure out how to change your air/fuel ratio. Dunno if that'll really help with this problem, tho.

    EDIT (Doh! I forgot the link): http://motoredbikes.com/showpost.php?p=110505&postcount=17
  12. keatonx

    keatonx Member

    mine did this. it needs a new pump diaphragm.
  13. GearNut

    GearNut Active Member

    Barring an intake leak, I second keatonx's diagnosis. If the engine has been sitting for a while and the fuel inside the carb has had a chance to varnish up inside it then you also will be battling partially clogged fuel passages. This will cause a lean condition which will cause the high engine speed and eventually the carb will starve for fuel and the engine will shut down.
    Also, with today's modern ethanol blended fuels the rubber flap valves as well as the rubber diaphragm will get eroded and delaminate screwing everything up. A rebuild most likely is in order and is easy enough to do. Still, before tearing into the carb, check for a leaky gasket between the carb and intake. It is the easiest to diagnose and repair.