Yamaha F150A Service Manual page 138

POWR
10. Install half of the main bearings A into
the crankcase.
11. Apply sealant to the mating surface of
the crankcase.
NOTE:
• Install the main bearings in their original
positions.
• Do not get any sealant on the main bear-
ings.
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.
5-53
Power unit
NOTE:
• Crankcase bolts 1–4 can be reused three
times.
• Apply engine oil to the crankcase bolts
before installation.
• Tighten crankcase bolts 1–4 to the speci-
fied torques in two stages first, and then
tighten crankcase bolts 5–D to the speci-
fied torques in two stages.
• Make a mark e on the crankcase and
crankcase bolts, and then tighten crank-
case bolts 1–4 90° from the mark.
1–4 Crankcase bolt (M10):
1st: 30 N·m (3.0 kgf·m, 22.1 ft·lb)
2nd: 90°
5–D Crankcase bolt (M8):
1st: 14 N·m (1.4 kgf·m, 10.3 ft·lb)
2nd: 26 N·m (2.6 kgf·m, 19.2 ft·lb)
14. Align the keyway f in the crankshaft
with the cylinder block and crankcase
mating surfaces.
15. Align the marks g on the balancer shafts
with the alignment marks h.
63P3F11