the best shop manual to help out is the Johnson red book bible ..covers all you need 500 pages of all you need carb ignition gc ph etc…
https://watercraftmanuals.com/outboard/johnson/manuals/johnson-302231.htm
or see FREE download link by W.McNeil in this link 🙂 print locally double sided pages &spring bound
if not stuck mechanically drop some oil in the cyl, check-replace gear oil look for water although I suspect after 41 years there is none … or no oil 🙂
coils are likely shot and all cracked up, condensers need replacing points touched up or replaced
the usual stuff…
Joining AOMCI has priviledges 🙂
