Service manual - 1981 50hp Johnson

[Coach v]

I just bought my 1st boat and it has a 1981 50hp Johnson. I am looking for a service manual. Where is the best place to get one? I have seen a few on ebay for around $20 and a few that you can download for $10. The are many different manuals, some covering many sizes, some covering many years. Is it just personal preference? Is there a recommended type / brand?

[Coach v]

This is what I found for free. It is no the easiest thing to print, but it looks like it will work:

http://boatinfo.no/lib/evinrude/manuals ... de.html#/0

[joe20toon]

That is good for free! I had some trouble entering page numbers to skip around but, found the mouse and enter worked.