HD 25 Johnson Outboard
 

You can set the points at .025 and it will be fine. J6C or J4C Plugs will
be good. Older plug equivalents are J6J or J4J. (I have about 4 HD 25
engines).

I know of no where on the net to download a manual however the Antique
Outboard club's members often have manuals they might copy for you.
Go to www.aomci.org

Don Dando