RC8D engine manual
We have a 1981 Hunter 27 with the Renault engine. We have a copy of the manual. It's not great, so far as manuals go, but it's better than nothing!
Let me know if you are interested in having me make a copy. Also, would be helpful to share advice and knowlege on repairs and maintenance of the RC8D. We aren't sure if ours died a terrible death or still has some life left in it.