1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 260Get this manual
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MOTOR DISASSEMBLED Connect Ohmmeter (R scale) leads as shownIf switch is good, full continuity (zero ohms) will be indicatedIf full continuity is not indicated, clean switch contact surfaces, using an