Yamaha F25C Service Manual page 107

10. Install half of the main bearings into the
crankcase.
NOTE:
• Install the main bearings in their original
positions.
• Insert the projection of each bearing into
the slots in the crankcase.
11. Apply sealant to the mating surface of
the crankcase.
NOTE:
Do not get any sealant on the main bearings.
12. Install the crankcase onto the cylinder
block.
13. Tighten the crankcase bolts to the speci-
fied torques in two stages and in the
sequence shown.
NOTE:
Apply engine oil to the crankcase bolts before
installation.
6D55F11
14. Install the balancer piston E into the
crankcase, and then tighten the balancer
piston nut F to the specified torque.
15. Install a new O-ring and the balancer
cover G, and then tighten the bolts H to
the specified torque.
NOTE:
Apply engine oil to the balancer piston nut
and balancer cover bolts before installation.
E
S6D55970
Cylinder block
1–6 Crankcase bolt (M8):
1st: 15 N·m (1.5 kgf·m, 11.1 ft·lb)
2nd: 30 N·m (3.0 kgf·m, 22.1 ft·lb)
7–B Crankcase bolt (M6):
1st: 6 N·m (0.6 kgf·m, 4.4 ft·lb)
2nd: 12 N·m (1.2 kgf·m, 8.9 ft·lb)
Balancer piston nut F:
157 N·m (15.7 kgf·m, 115.8 ft·lb)
Balancer cover bolt H:
12 N·m (1.2 kgf·m, 8.9 ft·lb)
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