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ENGINE MAINTENANCE·
Carburetion and Fuel System
How to Overhaul, Replace Parts, Adjust (GP338, GP4338)
A
f ter
re-asse mb
led
, readjust
fuel level or
the
regul ator
completely
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@
®@@
@
@
@
®
\~~
®
@
Never try to overhaul or replace the
throttl
e
valve or sl1af t.
r----@
I
@
Do
not try to overhaul or replace the
cho ke
mechanism recklessly.
If the shaft is bent, or the lever is
damaged,
can repl ace.
®-
- -
@
Never
damage t
he top
o
f
t
he
adjuster.
When
replacing,
co
nfi
rm
i
f
t
he
orifice
of
the
body
is smooth.
@-- - - - '
Be
careful not to lose the friction ball or
the spring.
After replaced the
c
hoke valve fixing
screws must be hammered firmly. If not
Jtr/"'t"'•'l
o
o
se
screws
may
cause
a fetal damage
Too
tight screwing
may
d
amage
t
he
taper
of
the adjuster
or
th
e
orif
ice
of
the
body when replacing.
•
•
f or
the engine.
©
©
®
®
(j)
0
0
0
0
0
0
•
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0;
0
0
0
0
0
When assembling
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@
@
(1)@
ca
re should be tak en
.
Al I 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
11.
/
Deformed spr ing
may
result poor
per-
and six ports of the check valve coincide
([} d'
@
~
fo rmance.
.
. .
completely.
If not. the pump may not
@
When
assembling,
ensure
the spring is in
actuate, or show poor performance.
~
correct
positio
n f or the guide of
the
A.
Do not damage the tip of the taper.
®
lever.
~-
·w-@
@
·~
0-@
~
N ever pull or bend.
@~
•
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®
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Handle the d
iaphragm
spri
ng carefull
y
.
®~
-
If
pu
lled
or
bent,
spring may effect poor_.-
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• ...
r.a
~----~
4
@-------
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~
-
-
--
-
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@
-
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o
c.
c.>
•
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performance.
Confirm
if
the action is enough smooth.
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..
When diaphragm spring is replaced, read-
just fuel level of the
regulator.
@-6
@)
Secure
firmly.
@
®
@--~,_-Insert
correctly in the hollow of the
pump body.
I
Fig. 7-33
-85-
@
~
The outer lip must be correctl:y posi·
@-
e
tioned when assembling.
@)
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