Here's the link to the recoil starter diagram for the J25RCCA I looked parts up for..
We know it's not your model number since you have a military version (Model AEM25B).
It was suggested that the rewind starter was "Probably" the same as most if not all civilian models of the same year..
http://www.iboats.com/Rewind-Starter...iew_id.1535529
Does it look the same? Can you identify the parts?
If so, then this may be ok to use.. However.....
If there is a chance you could post pics of your actual rewind starter (or any parts you have a question on), that would help immensely..
I'm a relatively new to boating hobbyist myself, but there are a great many pro's here, some retired, some active, and also a lot of "Hobbyists" that have done this type of work for up to 50 years or more.. (Much more knowledgeable than I am... lol)
I have NO doubt, that with pictures, one of these great folks here could tell you EXACTLY what you need, which would be better than what I might find..