Yamaha F40BED, Service Manual, Page: 234 / 537

POWR
5-33
CYLINDER HEAD
E
CHECKING THE CAM SHAFT
1. Measure:
• Camshaft lobe dimensions and
Out of specification
→
Replace.
2. Measure:
• Camshaft journal diameter
• Camshaft journal inside diameter
Out of specification
→
Replace.
CHECKING THE DECOMPRESSION
ACTUATURS (MH)
Check:
• Decompression actuator
Excessive wear
→
Replace the cam-
shaft.
Cam lobe measurement
IN 30.89 - 30.99 mm
(1.2161 - 1.2200 in)
EX 30.89 - 30.98 mm
(1.2161 - 1.2173 in)
IN 25.95 - 26.05 mm
(1.0217 - 1.0256 in)
EX 25.95 - 26.05 mm
(1.0217 - 1.0256 in)
a
b
a
b
a a a
b
b
b
b
b
b
Camshaft journal diameter
#1
36.925 - 36.945 mm
(1.4537 - 1.4545 in)
#2, 3
36.935 - 36.955 mm
(1.4541 - 1.4549 in)
Camshaft journal inside diameter
37.000 - 37.025 mm
(1.4567 - 1.4577 in)
a
b