Line advance is controlled by tapping the string trimmer head on grass while running engine at full throttle
- Run the engine at full throttle
- Tap the knob on ground to advance line. The line advances each time the knob is tapped. Do not hold the knob on the ground
NOTE: The line trimming cut-off blade on the grass deflector will cut the line to the correct length
NOTE: If the line is worn too short, you may not be able to advance the string by tapping it on the ground. If so, stop the engine and manually advance the line.