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6.
7
PE JODICAL
ADJ ST
,
89
Cause due
to
:
1.
Low
supply voltage
2.
Defective
ignition
coil
3.
Defective
spark
plug
4.
No
sparking
may
also
be
due to
compressio
n
(Caution)
(1)
Do not remove
the
deposii
s
by
burning
(2)
When installing
the
spark
p lugs,
clean
the seating
area
free
of
oil
or
for
eign
matter
and
i
nstall
finger
t
ight before
torquing
with
a
plug
wrench.
(3)
The
spark p
lugs con
be
tested
after adjustment,
with the
p lug
tester. With
the
high tension
vo
ltage
maintained
constant,
vary
the test chamber pres-
sure and inspect the condition of
the
spark.
6. FUEL SUPPLY SYSTEM
Restriction in
the fue
l
supply
system will
prevent
·sufficient fuel
flow to
the
carburetor
and
cause
engine
to
sputter
during
acce leration or
the engine
may
stall
at high
speed.
a. Check
for sufficient
supp
ly of fuel in
the tank.
b.
Disconnect
the
fuel feed
tube from the
carburetor
and check
the fuel flow
with
the fuel
cock in
the
ON
o
r
the
RES
position.
(Fig. 6-15)
c.
If the
fue
l
flow
is insuffici ent,
remove
th
e
fuel
tank
fr
o
m th
e
body and clean
internally
.
Wh en the
flow
is
sti
ll
inadequate, remove the fuel
cock,
disassemble and
clean
.
(Caution)
CD
Th
e insufficient
fu el
flow may be
caused by
th
e
plugged vent
ho
le in th
e
filler
cap as
we
ll
as
the
restriction in
th
e fue
l
line.
(Fig. 6-16, 6-17)
®
The fue
l
cock is switched
to
RE
S
(r
eserve)
from the ON position when the fuel tank
becomes
empty.
Th
e
reserve
fuel
supply
contains approximately
0
8
g
(1. 7
u.s.
pt
)
for
t
he
·
1.4
Imp
pt
C
50,
C50M, C65,
C65M
and
appr
oximate ly
1
&
(
2 · 1
u.s.
pt)
for the
S50 and
S65
suffici ent t
o
1.6
Imp
pt
'
trave
l
approximately 50 km 131
mil
and 60
km
137
mil respectively
.
d.
Fuel
strainer
cleaning
Th
e accumulatio
n
o
f
dirt and water
in
the
fuel
cock strainer
cup will
cause a
restrictio
n
in
fue
l
flow, resulting in
drop
in
engine
sp
eed
and
mol-
function
of
the
carburetor.
C
lean
the
cock,
strai ne
r and the
fi
lter screen at
perio!ilic
Int
erval.
Figure
6-
16.
Fuel tonk
cop
c -:::.;
65MJ
Figure
6-
17.
Fuel
tonk
cop cross
sectio
n (550, 565)
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Troubleshooting
