Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 132Get this manual

Mercury Mariner 25HP 4-Stroke Outboard Service Manual 1997, Page 132

Adjusting Valve Clearance
3Adjust the valve adjusting screw against the feeler gauge using screwdriver until slight resistance is felt on the feeler gauge4Tighten nut to specified torque with gauge insertedValve Adjusting Nut Torque

120 lbin(13.6 Nm) 5Re-check the valve clearance and readjust if necessarya#1 Intake#1 #2 Intake#2 Exhaust

6Reinstall the cylinder head and flywheel covernghten bolts to the specified torque

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