Reply To: Advice please re purchase of 1958 7.5hp Johnson

[amuller]

Well, my CD 19 S (what does the S mean?) is a ’62. I’ve not had it apart but from looking at the parts breakdowns is appears to be a
plain bearing engine except for needles on the big ends. I’ve been running it at 24-1.

Now, the ’64 engine seems to be the same–plain bearings except for the big ends. So what makes this one OK at 50-1???? Are there other, non-obvious differences?

am