High and Low Carburetor Adjustment on a Stihl Trimmer

The carburetors on trimmers, blowers, weedeaters, and other small engine equipment, have several adjustments screws. If your equiment won't stay running or isn't running correctly, you may be able to adjust these screws to get it to run better. The high adjustment screw should be adjusted at full throttle. The low adjustment screw should be adjusted at idle. The idle adjustment screw should be adjusted at idle and is basically just adding or releasing tension to the throttle cable. If your equipment dies when you release the trigger, try adjusting the idle adjustment screw first, so that it adds tension to the throttle cable. If this adjustment doesn't work, it's possible you need to adjust the low adjustment screw. If your equipment lacks power and the rpm's sound too low or if it sounds like the rpm's are revving too high, you may need to adjust the high screw. This video shows how to make those adjustments on a Stihl FS-90 trimmer.

Видео High and Low Carburetor Adjustment on a Stihl Trimmer канала Mike Miller