1997 "EU" Johnson Evinrude 5 thru 15 Four Stroke Service Manual, P/N 507262, Page 20Get this manual
Oil Pressure Tests
1Remove wire from the oil pressure sender and remove sender from the powerhead18
rn []] []]OMCAttach Sealant NPT adaptertofitting to aand install 2a inpressure gaugeApply Pipe with Teflon threads
gauge in the powerhead9.915 (305cc): 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 RPM 89.9 (211cc): 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 RPM56: Start enginePressure must be established within 10 seconds of start up at 900 RPM Oil pressure to be 15 PSI minimum at 900 RPM Oil pressure to be 35-40 PSI at 4200-5200 RPMAll ModelsIf test results vary, check the following: Oil level Clogged oil filter Clogged internal passages Clogged oil inlet screen or tube Stuck or defective pressure regulator Defective oil pump