Yamaha F150A Service Manual page 121

NOTE:
• Apply engine oil to the cylinder head bolts
before installation.
• Tighten the M10 bolts to the specified
torques in two stages first, and then make a
mark a on the M10 bolts and the cylinder
head, and then tighten the bolts 90° from
the mark.
• Tighten the M8 bolts to the specified
torques in two stages.
Cylinder head bolt (M10):
1st: 19 N·m (1.9 kgf·m, 14.0 ft·lb)
2nd: 37 N·m (3.7 kgf·m, 27.3 ft·lb)
3rd: 90°
Cylinder head 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)
2. Install the camshafts into the cylinder
head with new oil seals.
E
63P EX
NOTE:
Install the camshafts so that the dowels are
facing inward and that they are aligned with
the mating surface of the cylinder head.
63P3F11
3. Install the camshaft caps, and then
NOTE:
• Install the camshaft caps in the proper posi-
tion as shown and with the stamped num-
bers facing upside down.
• Apply engine oil to the camshaft cap bolts
before installation.
E
63P IN
M M
S63P5110
S63P5C70
tighten the bolts to the specified torques
in two stages and in the sequence
shown.
E
5
1
4
2
3
Camshaft cap bolt:
1st: 8 N·m (0.8 kgf·m, 5.9 ft·lb)
2nd: 17 N·m (1.7 kgf·m, 12.5 ft·lb)
Cylinder head
1
E
2
5
1
4
3
2
3
S63P5120
4
5
6
7
8
9
5-36