Line tensioner/cast control not working!? Uh

Hey everyone,

a few months back I lost the 6723 part while fishing and only just got around to getting a new piece and I’ve put it on the reel but it’s not working, I have to tighten it to the max for any tiny bit of tension

so I’m assuming when it fell of the 2 parts behind it did also? So by rights I order these 2 pieces and then it should be fine?

SHIMANO ~ CURADO K 300

Thanks