ENGINE
6
f
I
Filter
to
Primary
main
nozzk
18
Secondary
throttle
valve
2
Needle
valve
11
Primary
main
air
bleed
19
Primal
throttle
valve
3
Secondary
slow
jet
12
Primary
slow
air
bleed
20
Idle
nozzle
4
Secondary
slow
air
bleed
13
Primary
slow
jet
2t
By
pass
hole
5
Secondary
main
air
bleed
14
Float
22
Primary
main
jet
6
Secondary
main
nozzle
15
Secondary
emulsion
tube
23
Primary
emulsion
tube
7
Secondary
air
vent
pipe
t6
Secondary
main
jet
24
Power
valve
8
Choke
valve
t7
Auxiliary
alve
25
Level
gauge
9
Primary
air
nt
pipe
Fig
EF
15
Sectional
view
of
model
DCH306
carburetor
bleed
The
gas
mixture
is
injected
into
the
venturi
through
the
main
nozzle
When
the
throttle
valve
is
wide
open
and
the
engine
requires
dense
mixture
gas
the
power
valve
opens
from
where
the
fuel
also
flows
into
the
main
system
Primary
system
Primary
main
system
The
fuel
flowing
out
of
the
passages
at
the
bottom
of
the
float
chamber
passes
through
the
primary
main
jet
and
is
mixed
with
the
air
coming
from
the
main
air
Secondary
side
Primary
side
1
Primary
main
nozzle
2
Primary
main
air
bleed
3
Primary
slow
air
bleed
4
Primary
slow
jet
5
Secondary
throttle
valve
6
Primary
throttle
valve
7
Idle
nozzle
8
By
pass
hole
9
Primary
main
jet
Fig
EF
16
PaTtially
loading
EF
10
FUEL
SYSTEM
5
Check
venturi
clusters
for
loose
or
worn
parts
If
damage
or
looseness
exists
replace
cluster
assembly
6
Check
the
linkage
for
operating
condition
7
Inspect
the
operation
of
accelerating
pump
Pour
gasoline
into
the
float
chamber
and
operate
the
throttle
lever
Check
condition
of
gasoline
injection
from
the
accelerating
nozzle
Assembly
and
instalIetion
Assemble
and
install
the
carburetor
in
reverse
sequence
of
disassembly
and
removal
Replace
the
gaskets
if
necessary
When
disassembling
and
reassembling
the
interlock
link
and
related
components
be
careful
not
to
bend
or
deform
SPECIFICATIONS
AND
SERVICE
DATA
Carburetor
model
Applied
engine
Type
Outlet
diameter
mm
in
rom
in
Venturi
diameter
Main
jet
Main
air
bleed
Slow
jet
Slow
air
bleed
Power
jet
Float
level
H
rom
in
Interlock
opening
of
primary
and
secondary
throttle
valve
G
I
Throttle
valve
opening
480
mm
in
Auto
choke
Fast
idle
setting
clearance
A
mm
in
Manual
transmission
Automatic
transmission
Vacuum
break
gap
between
choke
valve
and
carburetor
body
8
mm
in
Manual
transmission
Automatic
transmission
EF
21
the
components
Reassembly
carefully
and
correctly
so
that
all
interlock
links
operate
smoothly
JETS
The
carburetor
performance
depends
on
jets
and
air
bleeds
and
the
vehicle
emissions
largely
depends
on
the
carburetor
performance
That
is
why
these
components
are
manufactured
with
utmost
care
To
clean
them
use
gasoline
and
blow
air
on
them
Changing
jet
or
air
bleed
size
may
cause
ill
vehicle
emission
So
they
should
not
be
changed
their
numbers
DCH3064
for
Manual
transmission
DCH306
5
for
Automatic
transmission
Downdraft
Primary
Secondary
26
1
024
30
1
181
20
0
787
26
1
024
1
95
1
140
1
80
1
80
1
43
1
50
1
215
1
100
1
60
18
to
20
0
709
to
0
748
5
8
0
2283
0
80
to
0
88
0
0315
to
0
0346
1
07
to
1
17
0
0421
to
0
0461
1
140
to
1
260
0
0449
to
0
0496
1
205
to
1
335
0
0474
to
0
0526
