Avoid the trimmer line that costs £1 it is rubbish.
Try the blue line SL002 manufactured by ALM Manufacturing 01423 797208 avalable at Homebase, B&Q, FOCUS as it far superior
Richard
May 2009
Hi I had this problem and solved it by using a heavier grade cord I found the supplied one was of inferior quality.
howtomendit.com for free repair help, information and advice.
Try fixfault.com to fix grass trimmers.