To use this tool, first make sure your Briggs LO206 carburetor is clean and free of debris. Adjust the slide to the desired position for setting the float height. Place the tool on the carburetor and measure the float height accurately. For measuring the float drop, follow the same process. When using, handle it gently to avoid damage. After use, clean the tool with a soft cloth and store it in a dry place to keep it in good condition.