I called Ryobi on 01628 894400 and got the email address from an automated message. I can't put the email address here - it won't let me. I emailed them and they sent me an electonic copy of the user's manual (pdf format)
Fiona, May 2010
yes
David Valentine, May 2010
yes please urgently
squasher, June 2009
Hi
You unscrew the whole plastic bump section there is an allen slot in the centre but you need a big key to fit it. It does jam pretty tight by the time the string runs out.
Eric
Eric Cleary, June 2008
Hi
Try ryobi direct I wanted spares for the 2543 and they sent me back all the exploded drawings with parts and prices by return.
You could try 01614773366 this is their spare parts supplier.
regards
Eric
Eric Cleary, June 2008
actually i just need to know how to get the trimmer line off. tried to turn the bottom nut but does not move. does the manual tell me something?