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Mercury 50

Mercury 50
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CYLINDER HEAD
Page 4A-32 90-828631R3 MARCH 1999
Valve Springs
Check free length limit of each spring. Replace valve springs if not in specification.
55846
Valve Spring Free Length
1.569 - 1.491 in. (39.85 – 37.85 mm)
Check each spring on a flat surface using a square. Rotate spring and check space between
the top coil and square. Replace valve springs if not in specification.
55797
a
Valve Spring Tilt Specification “a”
Less than 0.06 in. (1.7 mm)

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