Yamaha F150A Service Manual page 137

NOTE:
• Main bearing cap bolts 1–6 can be
reused three times.
• Apply engine oil to the main bearing cap
bolts before installation.
• Make a mark b on the main bearing caps
and main bearing cap bolts, and then
tighten the main bearing cap bolts 90° from
the mark.
Main bearing cap bolt:
1st: 30 N·m (3.0 kgf·m, 22.1 ft·lb)
2nd: 90°
8. Install the piston with the "UP" mark on
the piston crown facing towards the fly-
wheel magnet.
63P3F11
NOTE:
Apply engine oil to the side of the pistons and
piston rings before installation.
Piston ring compressor:
90890-05158
9. Install the connecting rod caps 5 to the
connecting rods, and then tighten the
connecting rod bolts to the specified
torques in three stages.
c
5
E
d
90˚
CAUTION:
Do not reuse the connecting rod bolts,
always replace them with new ones.
NOTE:
• Make sure that the mark c of the connect-
ing rod faces towards the flywheel magnet
side of the crankshaft.
• Apply engine oil to the connecting rod bolts
before installation.
• Make a mark d on the connecting rod bolts
and connecting rod caps, and then tighten
the bolts 90° from the mark.
Connecting rod bolt:
1st: 23 N·m (2.3 kgf·m, 17.0 ft·lb)
2nd: 43 N·m (4.3 kgf·m, 31.7 ft·lb)
3rd: 90°
Cylinder block
1
2
3
4
5
S63P5A20
6
7
8
9
5-52