GOOD NEWS. . . . The PICTURE UPLOAD FUNCTION IS WORKING !!! The tech folks at the parent company have been able to remedy the issue. You can upload pictures once again. Thank you for your patience.
I just tested the compression on a 1979 Johnson 140HP, I cleaned it with seafoam, removed all spark plugs and tested the compression, it come out like this #1 110, #2 115 #3 130 #4 75 can someone tell me what is that telling me.
I agree with dsinger, Take both cylinder heads off and inspect the cylinders. Then take the by-pass covers off and see what the rings and pistons look like. Tell us what you find.
