Yamaha F225A Service Manual page 155

NOTE:
• The oil seals must be installed before tight-
ening the crankcase bolts.
• Apply engine oil to the crankcase bolts
before installation.
• Tighten crankcase bolts 1–F to the speci-
fied torques in two stages first, and then
tighten crankcase bolts G–S to the speci-
fied torques in two stages.
• Make a mark h on the crankcase and
crankcase bolts, and then tighten crank-
case bolts 1–F 90° from the mark.
1–8 Crankcase bolt (M8):
1st: 25 N·m (2.5 kgf·m, 18 ft·lb)
2nd: 90°
9–F Crankcase bolt (M10):
1st: 40 N·m (4.0 kgf·m, 29 ft·lb)
2nd: 90°
Crankcase bolt (M8):
1st: 14 N·m (1.4 kgf·m, 10 ft·lb)
2nd: 28 N·m (2.8 kgf·m, 20 ft·lb)
13. Install the piston with the "UP" mark on
the piston crown facing towards the fly-
wheel magnet.
NOTE:
Apply engine oil to the side of the piston and
piston rings before installation.
Piston ring compressor:
90890-05158
14. Install the connecting rod cap 8 to the
connecting rod, and then tighten the con-
necting rod bolts to the specified torques
in three stages.
69J3D11
CAUTION:
Do not reuse the connecting rod bolts,
always replace them with new ones.
NOTE:
• Align the marks i on the connecting rod
cap and connecting rod, which you made
during disassembly.
• Apply engine oil to the connecting rod cap
and connecting rod bolt before installation.
• Make a mark j 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 ft·lb)
2nd: 48 N·m (4.8 kgf·m, 35 ft·lb)
3rd: 90°
15. Install the oil pump F by aligning the oil
pump gear with the crankshaft.
Cylinder block
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