Yamaha F2.5A Service Manual page 96

POWR
11. Install the new gasket and cylinder head,
and then tighten the cylinder head bolts
H to the specified torques in two stages
and in the sequence shown.
H
2
4
CAUTION:
Do not reuse the cylinder head gasket,
always replace it with a new one.
NOTE:
Apply engine oil to the cylinder head bolts
before installation.
Cylinder head bolt H:
1st: 14 N·m (1.4 kgf·m, 10.3 ft·lb)
2nd: 30 N·m (3.0 kgf·m, 22.1 ft·lb)
12. Install the push rods, rocker arms I, and
rocker arm pivots J, and then tighten the
rocker arm locknuts.
J
13. Install the crankcase to the cylinder
block, and then tighten the crankcase
bolts to the specified torques in two stage
and in the sequence shown.
5-35
Power unit
3
E
1
S69M5C10
I
S69M5480
7
6
1
5
4
Crankcase bolt:
1st: 5 N·m (0.5 kgf·m, 3.7 ft·lb)
2nd: 11 N·m (1.1 kgf·m, 8.1 ft·lb)
14. Install the new gasket and cylinder head
cover, and then tighten the bolts to the
specified torques in two stages and in the
sequence shown.
1
4
3
Cylinder head cover bolt:
1st: 5 N·m (0.5 kgf·m, 3.7 ft·lb)
2nd: 12 N·m (1.2 kgf·m, 8.9 ft·lb)
15. Install the thermostat K, new gasket L,
and thermostat cover M, and then
tighten the thermostat cover bolts N to
the specified torque.
8
9
0
2
3
E
S69M5A20
5
6
2
S69M5500
69M3E11