Yamaha F150B Service Manual page 272

POWR
TIP:
Do not put the Plastigauge (PG-1) over the oil
hole in the crankshaft journals.
5. Install the remaining half of the main
bearings into the crankcase.
TIP:
Install the main bearings in their original posi-
tions.
6. Install the main
crankcase onto the cylinder block and
apply engine oil to the threads of the
main bearing cap bolts d, crankshaft
bolts e, and crankcase bolts f.
7. Tighten the main bearing cap bolts d
and crankshaft bolts e to the specified
torques in 2 stages and in the sequence
numbers (a, b, · · ·). In the 2nd stage,
make a mark a on the crankcase main
bearing cap bolts d and crankshaft bolts
e, and then tighten the bolts 90° from
the mark. NOTICE: Main bearing cap
bolt d a–f and crankshaft bolts e
a–d can be reused 3 times.
8. Tighten the crankcase bolts f to the
specified torques in 2 stages.
7-59
Power unit
bearing cap and
d
e
90
a
a
d
90
a
m
i
f
e
h
l
e
Main bearing cap bolt d a–f (M10):
1st: 30 N·m (3.0 kgf·m, 22.1 ft·lb)
2nd: 90°
Crankshaft bolt e a–d (M10):
1st: 30 N·m (3.0 kgf·m, 22.1 ft·lb)
2nd: 90°
Crankcase bolt f e–n (M8):
1st: 14 N·m (1.4 kgf·m, 10.3 ft·lb)
2nd: 26 N·m (2.6 kgf·m, 19.2 ft·lb)
9. Remove the main bearing cap and
crankcase, and then measure the width
of the compressed Plastigauge (PG-1)
on each main journal. Replace the main
bearing if out of specification.
f
b
c
e
c d
n
j
f
g
k
b a
e