1987-1993 Mercury Mariner Outboards 70/75/80/90/100/115HP 3 and 4-cylinder Factory Service Manual, Page 64Get this manual
2Shift into "Forward" gear and adjust carburetor low speed mixture screws properly (refer to "Carburetor" section) Throttle Cable Installation
1With end of throttle cable connected to throttle lever, hold throttle lever against idle stopAdjust throttle cable barrel to slip into barrel retainer on cable anchor bracket with very light preload of throttle lever against idle stopLock barrel in placeIMPORTANT: Excessive preload on throttle cable will cause difficulty when shifting from forward to neutral(Readjust throttle cable barrel, if necessary 2Check preload on throttle cable by placing thin piece of paper between idle stop screw and idle stopPreload is correct when paper can be removed without tearing but has some drag on it(Readjust throttle cable barrel, if necessary