2000-2005 Yamaha F40B Outboard Service Manual, Page 234Get this manual

CYLINDER HEAD
CHECKING THE CAM SHAFT
1Measure: Camshaft lobe dimensions

Out of specification

Replace
Cam lobe measurement IN 30.8930.99 mm (1.21611.2200 in) EX 30.8930.98 mm (1.21611.2173 in) IN 25.9526.05 mm (1.02171.0256 in) EX 25.9526.05 mm (1.02171.0256 in)

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