I have a factory rebuild engine in my bravo with a new JPI instrument.  Oil pressure in cruise is typically 55 psi at 2400 rpm 65% power. Sometimes it gets down to 52 psi.  That reading puts the gauge in the yellow.  I have checked the JPI with a calibrated gauge and the JPI is only 2 psi less than the other gauge. So the JPI is accurate enough. The pressure transducer is located above the right mag and not over the right alternator.  Oil temp is stable and fine. Oil level typically 9 quarts. No