Re: Sea King 5 h.p.
You can get a owners manual/guide for that gem at
www.acmeoutboards.com
Those are nice little motors, very reliable. If memory serves, point gap is .020, spark plug gap (J4J, J6J, J8J) is .030, and fuel mix is 16:1, but you can probably run it okay at 24:1 with modern TCW-3 outboard oil. A complete tune-up, coils,points,condensors, should cost less than $75, depending on where you get the parts. Read the thread, Awakening a Sleeping Outboard, on the forums and it'll give you a good baseline on what to do to put it back into service safely and effectively.