Oil in water / high oil pressure

[PrestonIV]

I have a 2004 Mercruiser 4.3. I have a little bit of oil coming out of the seawater outlet. I’ve never had to add oil to the engine until just recently. I also noticed the oil pressure runs at 80 psi. That seems a bit high. I pull the dipstick and the oil looks fine. I’m not sure where to start. Any ideas?

 

[Rick Stephens]

Start with a mechanical oil pressure gauge to make sure the reading isn't off a bunch. If you are running 80 PSI, someone stuck a high capacity or high pressure pump in. Not all that useful in this application.

I don't know what you mean by 'seawater outlet'.