My Mercruiser 5.7 developed an oil pressure problem. It was holding at 40 psi hot, cold, idle, or cruising. Suddenly, it idles at 20 psi, and tops at 70 psi at 3,000 rpm. I think the pressure relief valve is stuck, but i don't know where it is, or how to take it out and fix it. Any help?
I...
