Yamaha SL338D - Page 86

f · · ~ - --""""'!"-- -~ .....,,,,.,. _ __
! -· ~- . .. . .. ~ -= - -- - ------------------ - ·
•
•
•
I
• I
I
•
•
•
•
I
'
.
.
l
I
•
•
I
~~ ,i
! I
I
. .
. t i ~ •
• i I
r .
I t · ~
•
I
• •
I I
• •
~ ~
l •
• •
• I
ti •
• j
•
: {.
.. '
•
•
•
•
r. I ~
. I
1. 1 • •
::(. '; .
. . .
I I :-
'
• •
: '
• •
•
• • •
; .
ll :
!!· .
I • I
L
i i: ;
I
l 1
I 1 ; I
I ' .
.. .
' ' I
I~ !
I : .
I
I '. I
•
I
I
: :
. .
I
I
l = ~ '
j 1 !
, . .
•
I
I
•
,
I
i
'
•
•
• I . I
•
' I
. '
~ - ..
I • I '
I •
1 ' I
: I I
J t ; )
I I
j,
: ~
. ,.
'
I
•
I
•
'
I
'
•
•
•
~
•
I
•
•
~
•
p
~
r
•
f
I
'
I
' •
•
•
I
'
•
•
I
I
•
I
I
•
,.
• •
•
l
i
•
I ,
•
a
J
f:
•
f I
t
•
f
i:
~
'
I!
i
I,
•
l
t .
'I
•
I
~
I :
i •
I
I ,
•
I
•
'
•
•
•
•
•
~ .
•
•
•
f .
·'
•
•
•
'
•
• •
f
I
l
•
•
•
ENGINE MAINTENANC
E -Car bu retio n a nd Fuel S yste m
l
"
\
Fig. 7-16
Th e fuel level var ies from
refer to t he table below .
rnod el to mo del. For detai Is
(A is co n tacting surface)
SW433C
+ 0 + 0
A - 1 0
mrn (A - 0. 39 4 in}
SL338D
+ 0 + 0
A_ 10 rnm (A_ 0.394 in }
S L4 33B
A + 0 + 0
- 10
m111 (A_ 0.394 in}
E W4 33C
A+ 0 + 0
- 10
mrr. (A_ 0.394 in)
EL 433 B
+ 0 + 0
A_
10
mn1 (A_ 0.
394
in)
GP 433B
A+2
-5
n1m (A + 0.078 . }
-0.197
1
n
GP 338
A+2
+ 0.078 .
mm (A_
0
_ 1
97
1 n}
-5
7-2-4 Idling Speed Adjusb11ent
•
Th e idl i ng speed should be set according to the fo l lowing
t able .
' I
Idling r.p.m .
SW4 33C
1,800 r. p.m .
SL43 3B
1,800
r.p.m .
EL43 3B
1,
800 r. p.m.
EW433C
1,800
r. p.m .
GP433B
2,200 r. p.m .
SL338D
1,800 r.p.m .
GP338
2,4
00 r. p.m .
-
For smooth idling , the slow adju s ti ng screw mu st be
correctly set so that an optimu m fuel -a ir mix ture m ay be
fed to the engine . The setting of the slow adj ust ing s crew
will greatly affect the engine perform ance from sta rtin g to
acceleration in the range of low and me dium speeds.
Turn in or out the slow adjust i ng sc rew, a nd wh en t he
engine speed reaches its max i mum, back out th e sc rew 1 /8
- 80-
tur n to enrich th e mixture a littl e .
The fina l adjustment of idling speed is made by the thrott le
stop screw (idle speed screw) . The t hr ott le stop screw is
closely related to tl1e sl ow ad jus t in g screw in the adjust-
ment of idling speed. T l1 ei r positions cause the engine
speed
to i ncr e ase or decr ea s e, but by turn i11g in a nd out the
throttle stop screw, the final adjust ment sh o uld be done so
that the engine may run idle at spec ified r .p.m .
7-2-5 Adjus tm e nt Sequence is as Fo ll ow s:
(In case of single ca rbure tor )
{1} Back out the slow adju sting screw from a ligh tly seated
position, at th e sa me time, the setting of the main
adjusti ng screw s ho ul d be adjusted to fa ct o ry re co m-
mended se tt ing.
1 I l I
I--; \ \
\
l
I
Fig. 7- 17
(2) Start the engine and let it warm up.
(3} Increase t
he engine sp eed to specified r.p .m . by use of
the throttle s top screw .
•
1
(@
I
Fig . 7-18
(4) ~urn the slow adjusting screw in or out 1 /8 tur n each
time and when the idl in g speed reach es its maximum
an d becomes stable, stop turning the screw. Adjust t he
thr~ttl~ stop screw on ce aga i n, and set it so that th e
engine rdle
at specified r.p. m.
(5) Back off th e slow ad ju sting scr ew 1 /8 tur n.