Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 194Get this manual

Mercury Mariner 30/40 4-Stroke Outboard Service Manual 1998, Page 194

CYLINDER HEAD
2Measure valve clearance with feeler gaugeAdjust if out of specificationValve Clearance (Cold) Intake Exhaust 0.0060.010 in(015 0.25 mm) 0.010 0.014 in(0.25 0.35 mm)

aLock nut
bAdjusting ScrewIntake Valve ClearanceExhaust Valve Clearance

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