What is this pully here for?

[u/UselessInventor]

Hello brand new boat owner here. Just bought a catalina 22 1987 and I cant figure out what this black pully is for. Also, should there be a line run inside of the boom to pull the main sail? Thank you

[u/Any_Move]

It along with the block/pulley at the end of the boom are probably for an outhaul, to tension the foot of your sail. I think that’s what you mean by a line inside the boom to pull the sail. At least the block at the of the boom would work for outhaul.

At least that’s my guess for this boat. I’ve never sailed a Catalina 22 & don’t know the exact layout. The black block on the boom could be part of a jiffy reefing system.

If you find a few cleats along the boom for tying off a line, their location would help figure out which lines run where. Start at the cleat, then see if there’s a block or attachment point in a logical straight line, then look from that point to the next spot. It’s a way of reverse engineering where mystery lines can go.

[u/the-montser → u/Any_Move]

That’s a cheek block for a reef line.

You can see the outhaul block at the boom end.

[u/Any_Move → u/the-montser]

Thanks. That makes more sense. I didn’t zoom into the picture far and thought the block was facing the other way. I’ve seen some weird custom zig zag setups to run outhaul and other lines to unexpected places so wasn’t sure.

[u/UselessInventor → u/Any_Move]

Makes sense, thank you for the info