SELVA MARINE Blue Whale 250 EFI, Service Manual

Page: 177 / 377

6P23H11
5-64
1
2
3
4
5
6
7
8
9
6. Install the crankcase onto the cylinder
block and apply engine oil to the threads
of the crankcase bolts.
7. Tighten the crankcase bolts to the speci-
fied torques in 2 stages and in the
sequence shown.
NOTE:
• Crankcase bolts
1
–
F
can be reused 5
times.
• Do not turn the crankshaft until the crank-
shaft journal oil clearance measurement
has been completed.
• Tighten crankcase bolts
1
–
F
to the speci-
fied torques in 2 stages first, and then
tighten crankcase bolts
G
–
S
to the speci-
fied torques in 2 stages.
• Make a mark
b
on the crankcase and
crankcase bolts, and then tighten crank-
case bolts
1
–
F
90 ° from the mark.
8. Gently remove the crankcase, and then
measure the width of the compressed
Plastigauge (PG-1) on each crankshaft
journal. Replace the main bearing if out
of specification.
Selecting the main bearing
1. When replacing the main bearing, select
the suitable bearing as follows.
T
R
.
.
1
–
8
Crankcase bolt (M8):
1st: 25 N · m (2.5 kgf · m, 18.4 ft · lb)
2nd: 90 °
9
–
F
Crankcase bolt (M10):
1st: 40 N · m (4.0 kgf · m, 29.5 ft · lb)
2nd: 90 °
G
–
S
Crankcase bolt (M8):
1st: 14 N · m (1.4 kgf · m, 10.3 ft · lb)
2nd: 28 N · m (2.8 kgf · m, 20.7 ft · lb)
S6P25990J
E
90 ˚
b
PORT
UP
STBD
S
O
K
G
J
R
N
M
8
4
19 0 2
5C
D6
A 3 B
F E7
P
L
H
I
Q
Crankshaft journal oil clearance:
0.025 – 0.050 mm
(0.0010 – 0.0020 in)
Cylinder block