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11
When Indicator settles bet
ween
14
17
10
Ignition
timing
IS
retarded
12
When Indicator
moves
slowly
between
14
16
m
It Is because eIther elect
rode gaps of
plugs
are
too
narrow
or
breaker pomt
IS
defective
13
When md
cator
points
to
5
111
or
below
there is
leskage
at
intake manifold
or
gasket
of
carburetor
Faulty clampmg
of
gas
ket
FIg
3
14
When Indicator oscillates
regularly
between
5 19 In
there Is
leakage
at
cylm
der
head
gasket
Faulty
c1ampmg
of
gasket
15
When Indicator first
rises
high drops
down
to
zero
and tben
returns to 16
i1l
mufller
IS
clogged
16
When mdlcator
moves
slowly
between
I3 171n
carburetor
is
poorly
ad
justed
Dl agnosmg
EngIne by
means
of
a
Vacuum
Gauge
Battery discharged
or
CODDectloDS
poor
T
mmg
poorly adjusted
AIr
bplDg
sucked
In
Plug sparkmg
weak
t
Wlrtng
Incorrect
Plugs dirty
Tlmmg
mcorrect
Sbort
In
CIrcuit
IgnItion
coil
or
condenser defective
Econt a ct
pomt
dllty
Pomt
contact poor
Breaker
arm
insulatIOn defectIve
Rotor shorted
N
mOD
Stramer defective
Pipe
clogged
Float valve
sllckmg
No
air can
enter
tank
Fuel pump
not
operatIng
to
r P I u g
spark
0
l
1
SpBrklngat
termmals
a
Plugs
do
not
spark
N
k
osper
Cl
mg at ter
mllll
ls
Breaker
defectIve
1
o
Il
i
j
r
l
No
gasobne
in carburetor
68
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