However, be aware: Pinpointing the exact location without seeing your specific carburetor is impossible. Carburetor designs varied slightly even within the same year and model. A picture of your carburetor would help confirm the location.
Important Note: Adjusting the air screw incorrectly can severely impact engine performance, fuel economy, and emissions. If you're not comfortable working on carburetors, it's best to seek professional assistance. Improper adjustment can also lead to engine damage.