1997 Johnson/Evinrude EU 25, 35 HP 3-Cylinder outboards Service Manual, Page 85Get 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 CWIC Pin Removal Tool, PIN 322698Remove the nutwasher, and grommet from the sending unit leadDiscard the grommetOil Tank Sending Unit Test
rn LowmeterTestCalibrate black wire terminal "S" andscaleOil ohmmeter on appropriate Connect leads between tanl
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 "S" and tanlyellow wire terminal "A"