Selecting The Main Bearing - Yamaha F90D Service Manual

POWR
7. Tighten the crankcase bolts to the speci-
fied torques in two stages and in the
sequence shown.
b
60˚
NOTE:
• Do not move the crankshaft until the crank-
shaft journal oil clearance measurement
has been completed.
• Tighten the M10 bolts to 19 N·m (1.9 kgf·m,
14.0 ft·lb) first, and then tighten the M8
bolts to 14 N·m (1.4 kgf·m, 10.3 ft·lb).
• Make a mark b on the M10 bolts and the
crankcase, and then tighten the bolts 60°
from the mark.
• Tighten the M8 bolts to 28 N·m (2.8 kgf·m,
20.7 ft·lb).
Crankcase bolt (M10):
1st: 19 N·m (1.9 kgf·m, 14.0 ft·lb)
2nd: 60°
Crankcase bolt (M8):
1st: 14 N·m (1.4 kgf·m, 10.3 ft·lb)
2nd: 28 N·m (2.8 kgf·m, 20.7 ft·lb)
8. Remove the crankcase, and then mea-
sure the width of the compressed Plasti-
gauge (PG-1)
journal. Replace the main bearing if out
of specification.
5-47
Power unit
S6D85600
on each crankshaft
E
Crankshaft journal oil clearance:

Selecting the main bearing

1. When replacing the main bearing, select
the suitable bearing as follows.
2. Check the crankshaft journal mark on the
crankshaft 1 and the cylinder block mark
on the cylinder block 2.
2
3. Subtract crankshaft journal diameters
#1–#5 from cylinder block journal inside
diameters #1–#5.
0.024–0.044 mm
(0.0009–0.0017 in)
(#1) (#2) (#3) (#4) (#5)
1
#1
#2
#3
#4
#5
S60C5A40
S60C5A50
6D81G11