My weed eater starts but won't stay running. what

• To fix a weed eater that won't start, check the fuel to ensure that you are using the correct gas-to-oil ratio for the weed eater. Then, you have to change the spark plug. After that, replace the fuel filter. Now, you need to review the starting process of the weed eater.

back the carb screw out 1/4 turn.

Dirty screen in carb

Rod, Carb. may need adjusted, try loosening gas cap and start to see if cap vent plugged, there is a in tank fuel filter that you could fish out and remove to see if it is plugged. If still not running remove muffler and clean spark arrester screen, if screen plugged the trimmer will do this.
Check the attached links,instruction and guides, Good luck
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Use a hooked piece of wire to snag the filter through the fuel tank, it should pull off the fuel line.

If it is a pull start, leaving the switch on did no damage to the weed eater.
Gary

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.

Either the clutch is worn out or the flexible drive shaft is broken. Either repair is likely to cost almost as much as a new unit.

get a can of starter fluid and a helper. Start the weed eater and then squirt enough starter fluid into the air intake to keep it running while you move it through the settings. This will rid your tool of the crud that is causing your problem. Joe

you have the string in backwards, or the gear is not ingauged.