1999 "EE" Evinrude 5 thru 15 4-Stroke Service Repair Manual, P/N 787022, Page 20Get this manual
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Oil Pressure Tests
Start enginePressure must be established within 10 seconds of start up at 900 RPM Oil pressure to be 10 PSI minimum at 900 RPM Oil pressure to be 35-40 PSI at 4200-5200 RPM