1998 Johnson Evinrude "EC" 90, 115 SPL Service Manual, P/N 520209, Page 73Get this manual
Test Oil Pump "Self Priming" Feature
1Connect shop tank with 50: fueloil mixture to the outboard fuel inlet fitting[] 2Connect oil hose to the pumpDo not squeeze oil hose primer bulb Run engine at 1500 RPM until "NO OIL" signal turns OFFThis verifies oil pump is self-priming If "NO OIL" signal does not turn OFF, replace the oil pump section of VRO pumpUse VRO Oil Housing and Electrical Kit, PI 438955