Yamaha F225A, Service Manual

Page: 153 / 370

69J3D11
5-56
1
2
3
4
5
6
7
8
9
NOTE:
Install the oil seals using a general pipe of the
proper size.
Assembling the piston and cylinder
block
1. Assemble the piston
1
, connecting rod
2
, piston pin
3
, and new piston pin clips
4
.
NOTE:
• Face the mark
a
on the connecting rod in
the same direction as the “UP” mark
b
on
the piston, which you made during disas-
sembly.
• Always use new piston pin clips, and do not
allow the piston pin clip end to align with the
piston pin slot
c
.
2. Install the oil ring
5
, second ring
6
, and
top ring
7
to the piston with the “R” mark
d
of the second ring and the “RN” mark
d
of the top ring facing upward.
3. Offset the piston ring end gaps as
shown.
CAUTION:
Do not scratch the piston or break the pis-
ton rings.
NOTE:
After installing the piston rings, check that
they move smoothly.
4. Install the upper half of the bearing into
the connecting rod
2
and the lower half
into the connecting rod cap
8
.
5. Insert the projection
e
of the bearing into
the slot on the cap and connecting rod.
NOTE:
Install the connecting rod bearings in their
original positions.
T
R
.
.
Screw
3
:
4 N·m (0.4 kgf·m, 2.9 ft·lb)
S60C5E90
UP
R
RN
#1,#4
#2
#5
#3
45
°
45
°
#1
#2
#5
#4
#3
E
Cylinder block