When I first started into yacht sailing people would say things to me and I was no wiser as I didn't know the names of the lines and rigging on the boat, so I thought I would publish this item I found on the web a few years ago. If I'm teaching my Grandma to suck eggs I'm sorry but this post is for the guys out there just starting out into sails or new to the hobby.
And for the lines going to the controls for the rudder and sails.
I've found the most important thing on sail winches is the tensioner spring or elastic to keep the sheeting line on the pulley, I had lots of trouble until I installed one of these, I use one of those ponytail elastics acquired from her indoors ! but keep your eye on it in case it perishes.