How To Adjust A Carburetor On A Ryobi Grass Trimmer
How to Adjust a Carburetor on a Ryobi Grass Trimmer. The carburetor on a Ryobi grass trimmer includes three adjustments. The low speed adjustment controls the highest possible idle speed. The idle adjustment controls the idle speed while not turning the trimmer head. The high speed adjustment controls fuel consumption and overall engine performance. When making adjustments, always turn the knobs in small increments, and do not force them past their internal stops.
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