Yamaha F25C Service Manual page 106

POWR
5. 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 pistons and
piston rings before installation.
Piston slider: 90890-06529
6. Install half of the main bearings 9 into
the cylinder block 0.
E
NOTE:
• Install the main bearings in their original
positions.
• Insert the projection f of each bearing into
the slots in the cylinder block.
7. Install the balancer rod onto the crank-
shaft.
8. Set the crankshaft A and oil seals B and
C into the cylinder block as shown.
5-45
Power unit
0
9
f
S6D55920
NOTE:
Apply engine oil to the inner oil seals before
installation.
9. Install the connecting rod caps D to the
connecting rods, and then tighten the
connecting rod bolts to the specified
torques in two stages.
g
NOTE:
• Align the alignment marks g on the con-
necting rod cap and connecting rod.
• Apply engine oil to the connecting rod bolts
before installation.
Connecting rod bolt:
1st: 6 N·m (0.6 kgf·m, 4.4 ft·lb)
2nd: 17 N·m (1.7 kgf·m, 12.5 ft·lb)
E
D
S6D55950
6D55F11