Yamaha F80BETL Service Manual page 118

POWR
2. Check the crankshaft journal mark on the
crankshaft 1 and the cylinder block mark
on the cylinder block 2.
(#1) (#2)
1
#1
2
#2
#3
#4
#5
3. Subtract crankshaft journal diameters
#1–#5 from cylinder block journal inside
diameters #1–#5.
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.
5-49
Power unit
(#3) (#4) (#5)
S60C5A40
S60C5A50
Main bearing selection table
(20 °C [68 °F])
Cylinder block
journal inside
diameters –
crankshaft journal
diameters (mm)
6.023–6.026
6.027–6.034
6.035–6.042
6.043–6.049
6.050–6.058
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.
a
a
S6D85720
Bearing
Bearing
(cylinder
(crankcase
side)/thrust
side)
bearing
Green Yellow*
Blue Green*
Blue Blue
Red Blue*
Red Red
6D93G11