New Main Sheet Block

[DavidOakland]

I need to replace main sheet bottom sheeve block on my 1986 DS 1. Can someone tell me the Harken part number or enough size information that I can order it? I don't want to have to drive 2 hours to the boat to find out. The Harken wesite recommends a 57mm Ratchet Block — Swivel (I think). Thanks, David

[GreenLake]

Are you just trying to replace the block, or the whole swivel assembly? If the former, is your base a Harken?

And, to confirm, you have your mainsheet rigged aft boom with a single part coming down from the boom to the swivel? So you'd need a single block.

A 50 +/- mm size block with swivel connector sounds about right, although, technically, if the base already swivels, the block would seemingly not need that capability as well.

But a swivel connector usually has a bin rather than just an eye and perhaps that's the key to connect it to the swivel base.