Yamaha F4B, Service Manual

Page: 118 / 202

7-25
POWR
Power unit
Checking the oil strainer
1. Check the oil strainer. Clean if there is
dirt or residue.
Checking the oil seal housing
1. Check the oil seal housing. Replace if
cracked or damaged.
Installing the crankcase
Do not reuse a gasket, always replace it
with a new one.
1. Install the dowels
a
and a new gasket
b
.
2. Install the crankcase
c
, and then tighten
the crankcase bolts
d
to the specified
torques in 2 stages and in the order
a
,
b
, and so on.
3. Install a new gasket
e
, and then tighten
the blind plug
f
to the specified torque.
4. Install the cooling water hose
g
.
Outer rotor diameter
a
:
22.980–23.000 mm
(0.9047–0.9055 in)
Outer rotor height
b
:
9.950–9.980 mm (0.3917–0.3929 in)
Inner rotor height
c
:
9.950–9.980 mm (0.3917–0.3929 in)
d
c
b
a
Crankcase bolt
d
:
1st: 5 N·m (0.5 kgf·m, 3.7 ft·lb)
2nd: 11 N·m (1.1 kgf·m, 8.1 ft·lb)
Blind plug
f
:
20 N·m (2.0 kgf·m, 14.8 ft·lb)
a
b
c
d
e
f
g
h
i
j
d
e
f
g