Re: 1987 Johnson 9.9 upper crank seal

[Don]

Well, sure could be a seal, but haven’t seen many failures on these engines…
There were some crankcase sealing issues back then, so it may be a failure of the gel seal as well…
Only takes a moment to pull the flywheel and have a look at the seal…
If it looks "OK", you may want to clean the powerhead off, then run the engine again looking for the source of the leak(s).
I’m not sure if any of those slick OMC seal pullers will work on this engine, hope so because that makes seal replacement easy…