1996 Johnson/Evinrude Outboards 8 thru 15 Four-Stroke Service Manual, Page 18Get this manual
Oil Pressure Tests
1Remove wire from the oil pressure sender and remove sender from the powerhead
[]]]2Attach lS inNPT adaptor fitting to pressure gaugeApply ow: Pipe Sealant with Teflon to threads and install gauge in the powerhead9.915 Models: Start enginePressure must be established within 10 seconds of start up at 2000 RPM Oil pressure to be 20 PSI minimum at 2000 RPM Oil pressure to be 35-45 PSI at 5000-6000 RPM8 Models: 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