2009 31cc toro weed eater wont stay running. will fire and run at idle but wont stay running in 1,2,3 settings

Be aware that "weed eater" is a registered trade mark of "WeedEater". What you want is the price of a Toro String Trimmer. Here are Home Depot's prices:

https://www.homedepot.com/b/Outdoors-Outdoor-Power-Equipment-Trimmers-String-Trimmers/Toro/N-5yc1vZbx8iZ1i9

sounds like the adjustments are off. there is a spacial tool that is used to adjust the low speed. any shop should do this for you.

Jul 10, 2008 ... All Weed Eater brand gas trimmers require that oil be added to the gas in a ratio of 40:1,
You can Google these questions

Chek/change the fuel filter, clean the carburetor and adjust if necessary. Do you have fresh gas? Have the correct mixture of 2 cycle oil and gas?

Idle air mixture screw needs adusting

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.

A few things to check, clean or replace:

• fuel filter - located inside the fuel tank
• Spark arrestor - located at muffler
• Spark plug
• Carburetor

screw all the way in and back out 3/4 of a turn. Then adjust the bottom screw out 1/4 turn at a time till it cranks and continue adjusting till it idles good.
Then adjust the top screw till it stays running when going to high speed abruptly.

Check the air filter isn't dirty.
If the machine runs ok on high speed but cuts out while idling, the idle speed may be too low. There is usually an adustment screw for increasing the speed.
If the fuel line is a flexible type which moves around inside the tank, check it is able to move freely because if you are cutting at awkward angles, the end of the line can end end up above the surface of the fuel, **** in air and airlock the line. You can eliminate this as the problem by fully filling the tank.
Check whether there is a one way check valve on the tank. This vents air into the tank as the fuel leaves for the carburettor. Sometimes particles of dirt can get stuck in this.

Try a new spark plug.Thanks for asking and I hope it helps