Last time I mowed I noticed the cord that I pull to start the mower was starting to unravel. The next morning I went out to the shed and it had unraveled on its own a lot more. Anyway, it's going to eventually break when I go to start it and probably at the worst possible time. How hard are these to replace?
A royal pain in the butt. Some of the newer ones are not even replaceable. You have to replace the whole unit.
Why not just cut off what you have about 6" away from where that retainer ring is and tie on a new piece of line?
I did one on mine a couple of weeks ago and took agout 15 min. Only tool I needed was a 5/16" socket to pull the starter head off. Re-tensioned the spring on the recoil unit, threaded a new line in and bolted it back on.