1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 64Get this manual
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2 Shift into "Forward" gear and adjust carburetor low speed mixture screws properly (refer to "Carburetor" section) Throttle Cable Installation
20442 Throttle ArmIdle Timing ScrewLocknut<