Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 55Get this manual
OUTBOARD MOTOR INSTALLATION
5PuSh in on the cable end until resistance is felt
6While pushing in on the cable endadjust the cable barrel to attain the measured dis tance taken in Step 3
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aAdjust Cable Barrel To Attain The Measured Distance Taken In StepCable Barrel