1999 EE Johnson Outboards 25, 35 3-Cylinder Service Manual, Page 83Get this manual
4Remove the sending unit from the oil tank
5Note the position of the sending unit wires in the Amphenol connectorRemove the wires from the connector using OMC Pin Removal Tool, PI 322698Remove the nut, washer, and grommet from the sending unit leadDiscard the grommetOil Tank Sending Unit Test
Low Oil TestCalibrate ohmmeter on appropriate scaleConnect meter leads between black wire terminal "8" and tan black wire terminal "C" PositionMeter should show high reading PositionMeter should show low reading PositionMeter should show low reading Replace the oil tank sending unit if your results vary
No Oil TestConnect meter leads between black wire terminal "8" and tanyellow wire terminal "A" PositionMeter should show high reading PositionMeter should show high reading PositionMeter should show low reading