Yamaha SL338D - Page 91

ENGINE MAINTENANCE· Carburetion and Fuel System
How to Overhaul, Replace Parts, Adjust (GP338, GP4338)
A f te r re- asse mbled, readjust f ue l l eve l or th e r eg ula tor complet el y
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N eve r try to overhaul or replace the
thr o ttl e valve or sl1af t.
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Do not try to overhaul or replace the
choke mechanism recklessly.
If the shaft is be nt, or the lever is
damaged, c
an replace.
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Never damage the top of the ad juster.
When replacing,
co nfi rm if the or i fi ce of
th e body is smoot h.
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Be careful not to lo se the friction ball or
the s pring .
Aft er replaced the c hoke valve fixing
screws must be hammered firmly. If not
Jtr/"'t"'•'loo se sc rew s may cau se a fetal damage
Too tight sc re wing may damage the
taper
of the adjuster or th e o rif i ce of the
body when replacing.
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for the engin e.
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When assembling © @ @ (1)@
ca re s hould be taken .
Al I the fuel passage s must coincide.
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®-Confirm the correct position.
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-.,. Wh en 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. / Defo r me d sp ring may result po or per - and six ports of the check valve coincide
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~ fo rm ance. . . . completely. If not. the pump may not
@ Wh en asse mbling, ensure the spring is in actuate, or show poor performance.
~ co rr ect pos iti on for the guide of th e A. Do not damage the tip of the taper.
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eve r. ~- · w-@
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~ Never p ull or bend. @ ~ •
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~~ ---@ Han dle the diaphragm spring carefull y. ®~
- If pulled or be nt , spring may eff ect po o r_.-
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c. c.>
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-@ pe rform ance.
Confirm if the action is enough smooth.
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When di a phr agm spring is replaced, read-
ju st fu el level of the re gulator . @-6
@) Secure firml y.
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@--~,_-Insert correctly in the hollow of the
pump body.
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Fig. 7-33
-85-
@ ~ The outer lip must be correctl:y posi·
@- e tioned when assembling.
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