1990 Johnson Evinrude "ES" 40 thru 55 Service Repair Manual, P/N 507872, Page 257Get this manual

1990 Johnson Evinrude "ES" 40 thru 55 Service Repair Manual, P/N 507872, Page 257

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Running Test, Alternator Output

Guard against any red wire, its terminals, or the ammeter coming in contact with engine ground while the engine is runningContact may cause arcing