Ryobi Speed Spool
 

Hi everyone i hope someone can help me.

I have a ryobi 705R trimmer. I have a problem with the speed spool in that it keeps on throwing out the line. Ive tried various different methods of winding in the cord but it stll throws it out again as soon as the thing spins up.
Its all clean and dry inside the head and cant see anything worn, any ideas?

Matt.