Hold the yellow female plastic fitting and turn the black cutting line holder anti clockwise. You may need to use a pair of pipe grips or equivalent to turn the holder as they can become stuck with dried grass. Hope this helps.
David
April 2010
Automatic Answer
We may have found other answers which could help you.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix grass trimmers.