Checking The Crankshaft Main Journal Oil Clearance - Yamaha F150A Service Manual

POWR
4. Select the suitable color c for the con-
necting rod bearing from the table.
Connecting rod big end inside
diameter a
25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45
80
81
82
83
84
85
86
87
88
89
90
91
92
93
e
94
95
96
97
d
98
99
00
Upper bearing
color
d
Green
e
Green
f
Blue
g
Blue
h
Red
5-47
Power unit
c
c
S63P5800
h
g
f
Lower bearing
color
Green
Blue
Blue
Red
Red
NOTE:
• Example: If the connecting rod big end
inside diameter a is "35" and the crankpin
mark b is "81," then select the bearing col-
ors in "g."
• If the connecting rod inside diameter can-
not be measured, measure the crankpin oil
clearance using Plastigauge (PG-1) and
select the suitable combination of upper
and lower bearings from the table above so
that the oil clearance is within specification.
Checking the crankshaft main
journal oil clearance
1. Clean the bearings, main journals, and
bearing portions of the crankcase and
cylinder block.
2. Place the cylinder block upside down on
a bench.
3. Install half of the bearings 1 and the
crankshaft 2 into the cylinder block 3.
NOTE:
Install the main bearings in their original posi-
tions.
4. Put a piece of Plastigauge (PG-1) on
each main journal parallel to the crank-
shaft.
63P3F11