Installing The Timing Belt, Driven Sprocket, And Camshaft - Yamaha F150B Service Manual

3. Measure the camshaft journal diameter
c and cylinder head journal inside
diameter d. Replace the camshaft,
cylinder head assembly, or both if out of
specifications.
d
d
Camshaft journal diameter c:
24.960–24.980 mm
(0.9827–0.9835 in)
Camshaft cap inside diameter d:
25.000–25.021 mm
(0.9843–0.9851 in)
Installing the timing belt, driven
sprocket, and camshaft
• Do not turn the crankshaft counterclock-
wise, otherwise the water pump impeller
may be damaged.
• Do not turn the crankshaft or the driven
sprockets when the timing belt is not
installed. Otherwise the piston and
valves, or intake and exhaust valves
could collide with each other and be
damaged.
1. Make sure that the valve lifters and shims
are installed on the cylinder head. Apply
engine oil to the valve shims and valve
lifters before installation.
2. Install the camshafts with the new oil
seals a. Make sure the camshafts are
installed to the original positions. Apply
some molybdenum disulfide grease on
the cam lobes.
c
c
a
a
63P EX
3. Install the camshafts so that the dowels
b are facing inward and that they are
aligned with the mating surface of the
cylinder head.
IN
b
4. Apply a thin, even coat of sealant to the
mating surface of the camshaft caps c.
UP
c
TIP:
When applying the sealant, make sure not to
block the oil passages or oil holes.
Camshaft
63P IN
EX
7-30
0
1
2
3
4
5
6
7
8
9
10
A