•
•
ENGINE
MAINTENANCE
-Carburetion and Fuel System
How
to
Overhaul,
Replace
Parts,
Adjust
(SW433C,
SL4338,
EL4338,
EW433C,
SLJJBD)
After re-assemuled, readjust fuel level
or
the regulator completely.
Never
try
to
overhaul
or
replace the
throttle
valve
or
shaft.
Never damage
the
top
of
the
adjuster.
@
• •
•
------
@
Do
n
ot
try
to
overhaul or replace the
choke mechanism recklessly.
If
th
e shaft
is
bent,
or
th
e lever
is
dan1aged,
can
replace.
Be
careful n
ot
to
lose
th
e
friction
ball
or
the spring.
After
replaced the choke valve
fi
xing
sc
rews
must
be hammered
firmly.
If
not loose screws may
cause
a fetal
damage
for
the engine.
Never forget
to
insert ring.
When replacing,
confirm
if
the
orifice
of
the
body
is
smooth.
Too
tight
screwing
may
damage
the
taper
of
the
adjuster
or
the
orifice
of
the
body
when
replacing.
CD
Wh
en
assem
bl ing
CD
®@
© ® @
"'=
~
r-
-----
----
--
care should
be
taken.
®
All
the fuel
passages
must
coincide.
•
Confirm
the
correct
position.
®
>
~~)~--
-
-
®
When assembling the check valve,
ensure all the
outer
lip
of
the
check
valve
fit
in
the
hollow
of
the
pump
body,
and also ensure
the
valve seat
of
the
pump
body
and six
ports
of
the
check valve
coincide
completely.
If
not,
the
pump
may
not
actuate,
or
show
poor
performance.
@ Secure
firm
l
y.
Secure
firmly.
Do not damage the
tip
of
the taper.
-®
When the
tip
is
worn
or damaged,
repla
ce
with
@
by
assembly.
Deformed
sPring
may
result
poor
per-
formance.
@--------.:o
When assembling, ensure
the
spring is
~~":::ii
0
~
--
----
-
@
in
correct
posi
tion
for
the
guide
of
the
r..:::::::=::=;~,
lever.
Confirm
if
the
action
is enough
smooth.
I
~
~---
----'z2'
@--~~~~--~r-----==-------~====~\!:!:)
Take
ca
re
not
to
make any flaws inside
and the seat sect
ion
.
•
•
When the seat section is
worn
or
Insert
correctly
in
the
hollow
of
the
• damaged, replace
with
@ by assembly.
pump
body.
@
The
outer
lip
must
be
correctly
posi-
tioned
when
assembling.
Never
pull
or
bend.
@)
Handle
the
diaphragm spring
carefully.
If
pulled
or
bent,
spring
may
effect
poor
performance.
When
diaphragm spring is replaced,
readjust
fuel
level
of
the
regulator.
@
Secure the
nut
after
fuel
level
adjust-
ment.
•
.....
@
•
Fig. 7-32
-84-
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