So they will not move at all. From what you guys are saying I’m going to go with it’s the shelves at the top of the mast.
@Davidasailor26 &
@rgranger so what would be the best way to take care of them?
Let this be a lesson to all you newbies out there planning to buy an old boat that's been sitting around for a while.... Have the seller raise the sails.... first to see their condition and second to see how difficult it is... if they go up, you'll want to be able to get them down also.... sorry... I'll cut the lecture short.. but this kind of post is good for new people to read just because of your problem
My first thought was similar to Apex's comment about the halyard getting jammed, especially if it's wire. But...it could be the sheaves (which are the wheels inside blocks, which is a sailing term for pulley....ha, ha, get used to the terminology madness. That's the first thing I did when I decided to learn to sail... the very first...'cause it can really make questions easier to answer.. and I had many, many, many questions.... still do.btw. Anyway.....
If the SHEAVES are frozen, replace them. You can remove the old ones, take a few measurements and match them up from any online chandlery or rigging supply. The sheaves, okay... you can call them pulley's 'cause you're new, rotate on bearings which need lubrication every year or so. Measurement wise, you'll need the outside diameter, the channel width where the halyard rides, the diameter of the hole through which the pin fits (think axle). These things can get pricey so shop around.................... OR............ you can WD40 the bejesus out of the bearings and try to get it un seized.... be careful with using too heavy of a tool, such as a pipe wrench... it's easy to chip the edge of the sheave. Good luck...
Btw, you should learn whether your mast is designed to be lowered easily for trailor sailing... look at the base where the mast joins the deck... if it looks like the is a hinge type apparatus, then you're in luck. Next.... go online and search for everything you can find about your Coronado 25. They were a pretty popular boat, still a lot of them around and being used regularly.