Mercury Mariner 4, 5 102CC Sail 1990 Outboard Service Shop Manual, Page 32Get this manual

Mercury Mariner 4, 5 102CC Sail 1990 Outboard Service Shop Manual, Page 32

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Carburetor Adjustments Approximate Initial Settings
3 Back idle speed screw (a) ff of th rottle arm (b)4 Turn idle speed screw in ward (clockwise) until itjust touchesth rottle rm, then inward t