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Posted on Aug 28, 2014
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I have a Troybuilt TB80 weed eater. 3 settings for choke: weed eater will not run in the 3rd setting and it will cut off. Will idle for a short time in the 2nd setting or half choke position. Also sou

Additional you have to keep giving it gas in order to keep the motor running.

1 Answer

Lawrence Oravetz

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  • Garden Master 10,558 Answers
  • Posted on Aug 28, 2014
Lawrence Oravetz
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Joined: Jul 28, 2008
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Idle air mixture screw needs adusting

  • michael rodrigue Feb 07, 2015

    what do you do if the carb. don't have idle air mixture screws on it

  • Lawrence Oravetz Feb 07, 2015

    I have never seen a 2 cycle carb without a hi speed air mixture and a low speed air mixture screw adjustment. You may have a missing part.

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5 Related Answers

hunter19_46m

Curtis Sewell

  • 7482 Answers
  • Posted on Dec 23, 2010

SOURCE: I have a RYOBI weed eater model ss30. I can get

Check your fuel filter in the fuel tank,if you have one it may need cleaning or replacement.
If the mower/weedeater is over a year old, then I recommend that you buy
and install a new carburetor repair kit,because the diaphragm will get hard
and that will cause it to be hard to crank.
Sounds like you will need to clean the carburetor or replace your carburetor
internal rubber parts like the diaphgram and O rings.
Be sure to use compressed air to blow out all the fuel and air passages.
Be careful when blowing out the passages, because there are sometimes small
rubber type seats in the bottom of some of the passages.
Sometimes you can get by with priming the carburetor or using starting fluid
and letting it run a few times like that and it will flush the gunk out of
the jets,but most of the time you will need to rebuild the carburetor.
Keep in mind that the float for the carburetor must be level when you go to
reassemble the carburetor or follow the instructions you get with the
carburetor kit.
When you clean your carburetor and remove the jet screws, you will first need
to lightly seat the jet screws.
But before you lightly seat the jet screws count the number of turns it takes
to seat the jet screws from their original position.
Be sure to mark the turns down on a piece of paper.
That way when you put the jets back in, you know to lightly seat them first
and then turn them back out to their orginal position before you started.
This is a FREE answer,Please rate me

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Anonymous

  • 11 Answers
  • Posted on May 05, 2010

SOURCE: Trimmer will only run in choke position

You have a few possibilities. Make sure you have good fresh gas in the tank. You're not getting enough gas, so choking helps get more gas than air, making it run better. Could be the carb diaphram (not very expensive if you replace yourself), when they get old they don't perform like they should. Could be the filter in the gas tank is bad, plugged. Also might be just an easy adjustment on the carb Low, and High speed screws. The choke has three positions, full choke, partial choke, and no choke, which means run position.

#1 Taper

Jim Parker

  • 1041 Answers
  • Posted on Jun 02, 2009

SOURCE: Homelite gas trimmer will not run without half choke and throttle

You need to disassemble the carb. and spray with carb. cleaner. If you need tips on how to do this, just let me know. You may need a new carb. kit as well, but we won't know that until you first perform the first step, or if the carb. parts are more than 3 years old. If they are, then go ahead and buy the carb. kit and replace the parts.

Jim

Anonymous

  • 62 Answers
  • Posted on Sep 25, 2009

SOURCE: poulan ppb 250 weed eater, only runs with choke on,

HOW IS YOUR FUEL LINES. SOUNDS LIKE IT MAY HAVE A AIR LEAK

Anonymous

  • 1 Answer
  • Posted on Jul 27, 2010

SOURCE: weed eater starts but won't stay running

just bought a new Poulan 25cc 2cycle gas power weed eater . I can start it with the choke on but as soon as put on run it dies.

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Related Questions:

0helpful
1answer

Why will my Ryobi 725r weed eater's throttle not respond on no choke but will respond on 1/2 choke?

I would inspect carb and see what the difference is between 1/2 choke and no choke. Set the choke, move the throttle and look into carb- doesnt need to be running. Sounds like something is still restricting airflow at no choke.
1helpful
1answer

I have a Ryobi S430 4 stroke Weed Eater Trimmer. How many times do i pump the choke (primer) to start cold?

chokes are an obstruction placed over the inlet to increase the vacuum in the carby and cannot be pressed
Primer bulbs are used to suck fuel through the diaphragms to expell all of the air in the system to allow starting
normally press the primer bulb until it is full of fuel
apply the choke and pull until it fires
remove the choke and at full throttle pull until it starts
0helpful
1answer

Starting procedure

Terry: According to eHow.com:

"
  • Put on a pair of safety glasses. Remove the fuel cap from the Weed Eater and set it aside. Fill the fuel tank with unleaded gasoline that has been mixed with quality 2-stroke oil in a 40:1 ratio. Replace the fuel cap.
  • Move the Weed Eater to a safe place and lay it flat on the ground. Depress the fuel bulb located beneath the carburetor approximately six times to prime the engine. Press it slowly so that fuel has adequate time to traverse the fuel line.
  • Slide the handlebar-mounted engine "On/Stop" switch to the "On" position. Slide the choke lever beneath the fuel tank to the "Full" position.
  • Depress the "Throttle Lock" lever located beside the engine "On/Stop" switch. Keeping the lever depressed, squeeze the throttle trigger. Release the throttle lock. This sequence holds the trigger in the depressed position, which aids in starting the Weed Eater.
  • Roll the Weed Eater so that it is resting on the engine and the trimmer head shield only. This will allow the spinning trimmer head to avoid contact with the ground. Brace the Weed Eater by holding it to the ground with one hand. Using your other hand, pull the starter rope quickly until the engine begins to run. Do not pull the rope more than a dozen times. If it fails to start by then, squeeze the throttle trigger and continue to pull until the engine starts.
  • Allow the Weed Eater to warm up for about 15 seconds, then slide the choke lever to the "Off" position. Let the trimmer run for another minute without touching the throttle lever. After the Weed Eater has warmed up, squeeze the throttle trigger once to disengage the throttle lock. The trimmer is now operational.


  • Read more : http://www.ehow.com/how_6720315_start-gas-weed-eater.html"
    Jun 08, 2015 • Garden
    1helpful
    2answers

    When weed eater is running in order to get the head to turn i've got to give it full throttle before i can cut the grass, and it still bogs down.

    do you have two adjustment screws down in a hole in the carb?
    If you do they are the carb. high and low adjustment.
    What I do is take a hacksaw and cut a groove right in the housing an the screw heads .that way you can adjust them Good luck
    Feb 07, 2015 • Troy Garden
    0helpful
    2answers

    Why won't my FeatherLite FL-20C weed eater will not stay running when I put it in full choke. What could be wrong?

    It should run ok after warming up. After starting it, let it run for a minute or so and then try gradually opening the choke. You might try increasing the throttle setting at the same time. After the motor is hot, if you have to have the throttle setting increased in order to keep it running it means the idle setting needs to be increased, usually by turning a screw to keep the fuel valve from closing so much, or that there is a problem with the fuel flow......like a clogged jet or fuel passage in the carb.
    1helpful
    1answer

    Troybuilt tb80ec wont start

    If you didn't over winter the engine properly it could be several things. Start with replacing the fuel filter. If it still won't start... time to put in a carburator kit. Next time make sure you run your weed eater dry and spray some wd-40 or the like into the spark plug hole.
    0helpful
    1answer

    How to set choke on Weed Eater sq 4.5 or other suggestions for problem below>?

    You are having this problem because the carburater is gummed up inside and it needs to be taken apart and cleaned.sounds like the idle jet is clogged.Adjusting the choke will not help.I have a mobile repair service and see this problem on a regular basis.443-791-0895
    Apr 24, 2014 • Garden
    0helpful
    2answers

    Weed eater wont stay running

    Here are a few things to check, that are solutions for your symptoms. Check, then clean or replace:
    • Fuel Filter - located in the fuel tank
    • Spark Arrestor - at muffler
    • Spark Plug
    • Carburetor - may need rebuild kit?
    Look here...

    And...
    Sep 02, 2012 • Garden
    1helpful
    2answers

    My leaf blower starts up fine but when I advance choke to its 3rd setting which is all the way open and try to raise throtle it dies out and have to close choke to keep running.

    Sounds like a carb issue. Try spraying carb and choke cleaner while it is running. If that does not help may be remove carb and clean and rebuild it. My weed eater does same thing and I get it running and then spray it down. It takes a couple of sprayings but it helps.

    Good luck
    roundo4
    Sep 07, 2009 • Garden
    0helpful
    2answers
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