Probably mold.The segments of my main and jib halyard that "live" inside of my mast when the sails are down are becoming darkly discolored. I've had the boat 2 years and have only noticed it with in the last few months. Its almost as if some oil or lubricant or something is getting on them from inside the mast. Its not just that the sun is bleaching out the segments that are normally outside.
Nothing else is wrong with them. No signs of fraying etc... There's nothing mechanical inside the mast. Could it just be mold?
Ideas? If it is solvent or mold could this weaken the lines?
Can't understand how you could get oil or lubricant inside the mast?
Take the halyard down and give i it a tour i the washing machine.
I have done so to all my running rigging - the ropes feels like new.
All my running rigging have splices or sewn whippings at the ends to prevent distortion between the core/cover.