1996 Johnson Evinrude "ED" 9.9 thru 30 2-Cylinder Service Repair Manual, P/N 507122, Page 131Get this manual
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STEPRUNNING OUTPUT TEST
Voltmeter
"NEG", 500 "POS", 500
If either cylinder shows less than specified output, test charge coilRefer to STEPCHARGE COIL TEST charge coil tests go