1990 Johnson Evinrude 120 thru 140, 185 thru 225, 300 HP, Service Repair Manual P/N 507875, Page 140Get this manual
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Ohmmeter Test
0 2 Calibrate ohmmeter on Rx100 scale and connect between jumpers
1sl 3-r:o test for grounded condition, connect ohmmeter alternately between each jumper and clean engine gro