How do you adjust throttle screw on B20?

To adjust the throttle screw on a B20 engine, first ensure the engine is off and cool. Locate the throttle screw, typically found on the throttle body or carburetor, and use a screwdriver to make small adjustments—turning it clockwise usually increases the idle speed, while counterclockwise decreases it. After adjusting, start the engine and check the idle speed, making further adjustments as necessary for optimal performance. Always refer to your specific vehicle’s manual for detailed instructions and specifications.