Mercury Workshop Service and Repair Manuals

Valve Clearance: Specifications

Valve Clearance

Nominal desired midrange clearance

Intake .......................................................................................................................................................................................  0.25 mm (0.0095 inch)
Exhaust ....................................................................................................................................................................................  0.30 mm (0.0115 inch)

Acceptable fully installed clearance

Intake .......................................................................................................................................................................  0.22-0.28 mm (0.008-0.011 inch)
Exhaust ....................................................................................................................................................................  0.27-0.33 mm (0.010-0.013 inch)