Yamaha F150B, Service Manual

Page: 271 / 458

7-58
Crankcase
0
1
2
3
4
5
6
7
8
9
10
A
4. Select the suitable color
c
for the
connecting rod bearing from the table.
Example:
If the connecting rod big end inside diameter
a
is “35” and the crankpin mark
b
is “81,”
and then select the bearing colors in “
g
.”
Checking the crankshaft journal oil
clearance
1. Clean the bearings, crankshaft journals,
crankcase, cylinder block, and main
bearing cap.
2. Place the cylinder block upside down on
a bench.
3. Install half of the main bearings
a
and
the crankshaft
b
into the cylinder block
c
.
TIP:
Install the main bearings in their original posi-
tions.
4. Put a piece of Plastigauge (PG-1) onto
the crankshaft journals, parallel to the
crankshaft.
b
P1
P2
P3
P4
P1
P2 P3
P4
c
c
Connecting rod big end inside
diameter
a
d
e
f
g
h
Crankpin mark
b
25
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
00
26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45
Upper bearing
color
Lower bearing
color
d
Green Green
e
Green Blue
f
Blue Blue
g
Blue Red
h
Red Red
a
b
c