Yamaha F90D, Service Manual

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6D81G11
5-48
1
2
3
4
5
6
7
8
9
NOTE:
Cylinder block journal inside diameters (#1–
#5) and crankshaft journal diameters (#1–#5)
can be determined by the stamped value as
described below.
Crankshaft journal diameter = 47.900 +
(stamped value/1,000)
Example: #1 = 92
→
47.992
Cylinder block journal inside diameter =
54.000 + (stamped value/1,000)
Example: #1 = 32
→
54.032
4. Select the suitable color
a
for the main
bearing from the table below according to
the calculated values.
CAUTION:
• The (*) mark indicates that the colors of
the upper and lower bearings are differ-
ent.
• Be sure to install the main bearings in
the middle of the cylinder block and
crankcase journal so they do not block
the oil holes.
NOTE:
Main bearing #3 is a thrust bearing.
Example:
If the “Crankshaft journal mark” is 92, and the
“Cylinder block mark” is 32, then the “Calcu-
lated value” = 54.032 – 47.992 = 6.040 mm
Suitable colors:
Bearing (cylinder side)/ thrust bearing
→
blue
Bearing (crankcase side)
→
blue
5. If the calculated value is more than the
maximum value (6.058 mm), replace the
crankshaft.
Main bearing selection table
(20 °C [68 °F])
Cylinder block
journal inside
diameters –
crankshaft journal
diameters (mm)
Bearing
(cylinder
side)/thrust
bearing
Bearing
(crankcase
side)
6.023–6.026 Green Yellow*
6.027–6.034 Blue Green*
6.035–6.042 Blue Blue
6.043–6.049 Red Blue*
6.050–6.058 Red Red
S6D85720
a
a
Cylinder block