1997 Johnson Evinrude "EU" 40 thru 55 2-Cylinder Service Manual, P/N 507265, Page 290Get this manual
RectifierRegulator Replacement 1Disconnect the battery cables at the battery2Remove the rectifierregulator leads from the terminal board3Remove the two screws retaining the rectifierregulator to powerhead4Place the rectifierregulator on the powerheadInstall and tighten the two screws to torque of 60-84 inIbs(7-9 Nm)5Connect the rectifierregulator leads to the terminal boardApply OM: Black Neoprene Dip to the connections6Reconnect the battery cables
AC Lighting Coil Resistance Tests
1Calibrate ohmmeter on appropriate scaleConnect between yellowgray and yellow leads Meter must show 0.86 0.05 ohmDR4160