Yamaha F150A Service Manual page 98

POWR
5. Check the intake valve clearance for cyl-
inders #1 and #2, and exhaust valve
clearance for cylinders #1 and #3. Adjust
if out of specification.
6. Turn the flywheel magnet 360° clock-
wise.
7. Check the intake valve clearance for cyl-
inders #3 and #4, and exhaust valve
clearance for cylinders #2 and #4. Adjust
if out of specification.
EX
e
NOTE:
• Check the valve clearance when the engine
is cold.
• Note the measurement.
Valve clearance:
Intake e:
0.20 ± 0.03 mm (0.008 ± 0.001 in)
Exhaust f:
0.34 ± 0.03 mm (0.013 ± 0.001 in)
8. Turn the flywheel magnet 360° clockwise
and align the "TDC" mark on the flywheel
magnet with the pointer, and check that
the "I" marks on the driven sprockets are
aligned.
5-13
Power unit
IN
#1
#2
#3
#4
f
S63P5070
9. Using a hexagon wrench, turn the timing
belt tensioner 4 clockwise to push the
timing belt, increase strength gradually,
and then insert a ø5.0 mm (0.2 in) pin 5
into the hole g.
NOTE:
Leave the pin inserted into the timing belt
tensioner until the timing belt has been
installed.
10. Remove the timing belt 6 from the
driven sprockets.
6
4
11. Remove the driven sprockets.
NOTE:
Hold the camshaft using a wrench, and be
careful not to damage the driven sprocket.
12. Remove the camshaft caps in the order
shown in the illustration.
5
g
S63P5080
S63P5090
63P3F11