Installation Instructions
B1700·B21 00·B2400 WSM, 11770
[2]
ENGINE
BODY
CHECKING
AND
ADJUSTING
1
ENGINE
Compression Pressure
1.
Run
the engine until
it
is
warmed up.
2.
Stop
the
engine, and
then
remove
the
air
cleaner
and
muffler.
3.
Remove
the injection nozzles from all cylinders, and set a
compression tester
(Code
No.
07909-30207)
with
the adaptor
to
the nozzle hole.
4.
Keep
the engine stop lever
at
"Stop Position".
5.
While cranking the engine
with
cell starter, measure
the
compression pressure.
6.
Repeat
steps
3 through 5
for
each
cyli nder.
7.
Ifthe
measurement
does
not
reach
the
allowable limit, apply
a small amount
of
oil
to
the cylinder wall through
the
nozzle
hole and measure the compression pressure again.
8.
If
the compression pressure
is
still
less
than
the
allowable
limit, check the
top
clearance, valve and cylinder head.
9.
If
the
compression pressure increases
after
applying
oil,
check
the
cylinder wall and piston rings.
III
NOTE
•
Check
the compression pressure
with
the
specified valve
clearance.
• Always
use
a
fully
charged battery
for
performing this test.
• Variances in cylinder compression values should
be
under
10
%.
2.84to
3.24 MPa
Factory spec.
29
to
33
kgf/cm
2
412
to
469
psi
Compression pressure
2.26 MPa
Allowable
limit
23
kgf/cm
2
327
psi
III
NOTE
• When reassembling the cylinder head,
be
sure
to
replace
the
cylinder head gasket
with
a new one.
(1)
Fuse
Top Clearance
1.
Remove
the
cyl
inder head, and remove
the
cyl
inder head
gasket.
2.
Move the piston up and stick four strips
of
fuse
[diameter:
1.5
mm (0.059 in.), length: 5
to
10
mm
(0.197
to
0.394 in.)] on
the piston head
(see
figure)
with
grease.
3.
Lower the piston, and install the cylinder head
with
new
cylinder head gasket and tighten the cylinder head
screws
to
the specified torque (39.2
to
44.1
N'm,
4.0
to
4.5
kgf'm,
28.9
to
32.5
ft-Ibs).
4.
Turn
the
flywheel
until
the
piston
is
raised and lowered
again.
5.
Remove
the cylinder head and measure the thickness
of
the
fuses.
6.
If the measurement
is
not
within
the factory specifications,
check the oil clearance between the crank pin and crank pin
bearing, and the oil clearance between the piston pin and
small end bushing.
B083F032
C067F039
Top clearance
Factory spec.
0.55
to
0.70
mm
0.0217toO.0276
in.
1-S
17