I picked up a 1957 Mercury Mark 25 outboard on eBay a while ago. Mine
is red and white, exactly like the picture at

http://www.oldmercs.com/mk25.html

It is supposed to be 18-20 hp. It has good compression and is in great
shape. I haven't run it yet, but I don't think that it should be too
hard to get it going. Parts are readily available through the same
site.

I already have an 18' runabout with a Suzuki DF140 for those days that
I want to take a few people boating with me. I want to build a boat
that I can use to go have fun with. Something fast and fun for one or
two people, max. I don't fish much.

A hydroplane or a small speedboat would be about right. I am familiar
with the Glen-L line of plans. Are there any other sources of plans
that are recommended?

Thanks for the ideas.