Mercury 40 FourStroke - Page 251

CYLINDER HEAD
Page 4A-34 90-857046R1 NOVEMBER 2001
3. Check each spring on a flat surface using a square. Rotate spring and check space be-
tween the top coil and square. Replace valve springs if not in specification.
a
Valve Spring Tilt Specification “a”
Less than 0.06 in. (1.7 mm)