1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 46Get this manual
4 Cylinder Battery Charging Diagram with Battery Isolator IMPORTANT: After electrical connections are made, coat all terminal connections using Quicksilver Liquid Neoprene (92-25711), to avoid corrosionBLK BLU GRY RED YEL DBLACK DBLUE DGRAY DRED DYELLOW
User Supplied Red Lead (10 Gauge Minimum Diameter with Protective Abrasive Sleeve Installed) Screw Size #10-16x38" PN 10-62568 Move Lead From Red Stud to Position Shown