Selecting The Crankshaft Journal Bearing - Yamaha F30B 2018 Service Manual

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Crankcase bolt (M8) "2" [1]–[8]
1st: 15 N·m (1.5 kgf·m, 11 lb·ft)
2nd: 30 N·m (3.0 kgf·m, 22 lb·ft)
Crankcase bolt (M6) "3" [9]–[16]
1st: 6 N·m (0.6 kgf·m, 4.4 lb·ft)
2nd: 12 N·m (1.2 kgf·m, 8.9 lb·ft)
h. Remove the crankcase, and then measure
the width of the compressed Plastigauge
(PG-1) on each crankshaft journal.
TIP:
When loosening the crankcase bolts, loosen
them in the opposite order used for tightening.
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Selecting the crankshaft journal bear-
ing
When replacing the crankshaft journal bearing,
select the bearing as follows:
1. Select:
• Crankshaft journal bearing
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a. Remove the crankshaft journal bearings.
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3
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b. Check the mark "a" on the crank web and
the mark "b" on the cylinder block.
c. Select the suitable colors "c" for the crank-
shaft journal bearing.
b
c
7-59
Cylinder block
J1 J2 J3
J2 J3 J4
J1
a
J1
J2
J3
J4
c
J4