Attention: The Admiral is on deck
Looks like a Lewmar size 16 will do the job, and we see it on the Oday 25. If you don't have a Lewmar in place the hole pattern may not match, though.
http://shop.odayowners.com/detail.htm?group=359
Steve Sam,
The Admiral of the Fleet answer your question! WOW!
A Barlow 16 is also common on 025s's and 16's. The Barient equivalent is 10.
But!!! how many screw holes thru the gunnells?
Early boats used winches with four screws, later boats used 5. So, you need to look underneath the gunnell and count screws.
However, most likely the winch can be rebuilt. The little springs while not universal are generally interchangeable with the repair kit available from Lewmar at West Marine. Imagine that?
Note that disassembly often takes experience or a teacher. Do not loose any of the parts. Locate somebody who has rebuilt winches before and let him show you the tricks, and there are tricks and sometimes special tools. I have rebuilt several different brands and the kit from west has worked for so far. They also sell instruction book and winch grease. Could it be that your winch just needs good cleaning and lub job?
There is a guy in California who operates a rebuilt winch store on eBay. His prices are for rebuilt winches and are fair.
Rebuilding is easier than trying to match screw holes which is not going to happen. I do not recall the brand Seaboard, or at least do not remember the name. But there are many names out there that I hear for the first time. So that is no big surprise. Is yours so old it it wood?
Ed K
O26