If your brush cutter does not reach its maximum speed or the engine does not accelerate properly, this may be due to an incorrect carburettor setting. To correct these symptoms, first make sure the fuel and air filters are intact and clean, check all seals and check the spark plugs.
Below we explain step by step how to adjust the carburettor of your brush cutter correctly. However, you should always refer to the instruction manual of your brush cutter.
Basic settings: Turn the H and L screws in as far as they will go and then turn them out one turn.
Preparations: Warm up the brush cutter.
Setting the idle speed: You can set the speed using the LA/T screw. Increase the speed so that the engine does not stop when idling, but the rotor does not run any more. Let the engine drop to idle several times to check the transition between idle and full throttle.
Adjusting the maximum speed: If your brush cutter still accelerates poorly, you need to adjust the L-screw. Important: When doing this, always check the previously made basic settings as well as the idle speed, as LA and L screws have an influence on each other. Use the H-screw to set the maximum speed correctly. You should use a rev counter for this.
At this point, we would like to point out once again that you should only make changes to the settings of your machine in accordance with the operating instructions of the brush cutter.