mercury Workshop Repair Guides

Mercury Workshop Service and Repair Manuals

Valve, Intake/Exhaust|Testing and Inspection > < Length Inspection|Page 2220
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Valve: Specifications

DIMENSIONS

Valve Head Margin Thickness    

Intake Valve ........................................................................................................................................................  1.15-1.45 mm (0.0453-0.0571 inch)
Exhaust Valve .....................................................................................................................................................  1.35-1.65 mm (0.0531-0.0650 inch)
Margin Wear Limit ......................................................................................................................................................................  0.5 mm (0.020 inch)

Valve Length    

Intake Valves ...................................................................................................................................................  125.3-125.9 mm (4.933-4.957 inches)
Exhaust Valves ..................................................................................................................................................  24.2-124.8 mm (4.890-4.913 inches)

Valve Stem Diameter    

Intake Valve Stem ...........................................................................................................................................  6.965-6.980 mm (0.2742-0.2748 inch)
Exhaust Valve Stem ........................................................................................................................................  7.965-7.970 mm (0.3136-0.3138 inch)

Valve, Intake/Exhaust|Testing and Inspection > < Length Inspection|Page 2220