S.1
ENGINE
BODY
92.4mm
STROKE SERIES
WSM,01092
0087F051
I
8
0087F052
SERVICING
[I]
CYLINDER
HEAD
3087F053
0087F054
I
Main Bearina Case
Assemblv
1.
Remove the two bearing case screws
1
(4),
and
remove the main bearing case assembly
1
(3),
being careful
with
the thrust bearing
(2)
and
crankshaft bearing
2 (5).
2.
Remove the main bearing case
1,
2
and
3
(1)
as
above.
(When reassembling)
0
Clean
the
oil passage
in
the main bearing case.
Apply clean engine oil on the crankshaft bearing
2
and thrust bearings.
0
Install the main bearing case assemblies
in
the
original positions. Since diameters
of
main
bearing cases vary, install them
in
order
of
makings (A,
E,
C)
from the gear case side.
Match the alignment numberts
(6)
on the main
bearing case.
0
When installing the main bearing case
1,
2
and
3,
face the mark
”
FLYWHEEL” to the flywheel.
Be sure to install the thrust bearing
with
its
oil
groove facing outward.
0
Confirm that the main bearing case moves
smoothly and holizontally after tightening the
bearing case screw
1
to the specified torque.
Cvlinder Head Surface Flatness
1.
Thoroughly clean the cylinder head surface.
2.
Place a straightedge on the cylinder head‘s four
sides and two diagonal as shown
in
the figure.
Measure the clearance with a feeler gauge.
3.
If
the measurement exceeds the allowable limit,
replace the cylinder head.
I
NOTE
0
Do
not place the straight edge on the combustion
chamber.
s-73
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