Re: 1984 Johnson v4 115 hp Compression
Generally if it's consistent across all 4 cylinders, then you're fine.
As far as in comparison to a new motor, I'm not sure what the readings are for a 90-degree of that year when new. I know my 1997 60 degree 115 was about 140 all the way around when I tested it last year.. which is right on spec for me. Unfortunately I can't comment on yours, but if all 4 cylinders are within 10% of each other that's at least a very good sign.
