I bought a Bosch strimmer a couple of years ago - it is a Bosch 3600H78G71 "EasyTrim". There is now no nylon fibre line (which is the bit used for cutting grass) protruding from the spinning part at the bottom. I presume this is because it has all been worn off (please correct me if I'm wrong, but I believe that these lines are designed to wear off after a while and be replaced by more of the nylon fibre line inside).
The thing is, I can't seem to find much on the web about replacing this nylon fibre line. Do I really have to buy a whole new strimmer because of this? Apart from this, the thing works fine. What I want is just to install a new nylon fibre line for cutting.
I have tried taking the mechanism apart, and the housing for the fibre line has this notch in it:
Does this look broken? I have tried feeding the wire through as the instruction booklet says:
But every time I try to use the strimmer, the thread seems to break inside the spool; there is no thread coming out of the hole, so it looks like it is being cut at that notch in the white housing (weird, because it's not sharp; I tried pulling the thread against it hard and it didn't break).
The insturction manual obviously shows this as a horizontal slit so the vertical slit that is there, could that be something that has developed over time with use? And could that be what is causing the thread to snap internally each time I use the strimmer (it happens almost immediately when I try to cut some grass)?
UPDATE: I tried again and the thread didn't break at the spool this time, but interestingly, the thread seems to be breaking very easily. Although I can't break it just by pulling it with my hands, almost every time I cut some grass or something with it, I hear the pitch of the motor change up, indicating that the thread has snapped and sure enough, it is significantly shorter than it was when it had been cut by the blade; about half the length, usually. I'm wondering whether the thread material has become "brittle" or weak in some way that makes it unable to withstand cutting things without snapping.