They are all necessary parts of a carburetor which allow it to perform properly.
Rephrase, Idle air control, idle circuit carburetor or
Have the timing checked , sounds like it might be off.
first step check all the fuses under the steering column left side panel (LH drive) if the fuses are ok (there is one fuse that supply power to the idle valve and some valve for emission) check the power supply goes to the idle valve, if you dont have a tester turn on the ignition swicth then unplug and plug the connector for the idle valve, if you hear it clicking your idle vale is good. Second step take it to the carburetor expert coz several mechanics hates carburetor nowadays.
The carburetor on a Weed Eater Featherlite SST25 is adjusted by turning the screws on the side of the carburetor. They control the idle mixture and idle speed of the engine.
If it is a fuel injected engine then you can not adjust the idle, it is computer controled. There is no idle adjustment. If it is a carburetor then there is a small screew over by the throttle cable, down towards the bottom of the carburetor.
Incorrect idle mixture (carburetor), or sticking IAC (idle air control), computer controlled engines.
Idle air control valve sensor is located around the carburetor .
Yes, There is a screw on the carburetor or throttle-body that controls idle speed.
To set the idle, adjust the carburetor.
If it has a carburetor, then there should be a screw somewhere on the carburetor. If it's fuel injected, then I don't think you can adjust the idle without hacking into the computer.
Could be the carburetor/idle speed out of adjustment, possibly a vacuum leak
With the engine running, turn the idle screw until you get the speed you want.