Filter
Top Products
Tractors,
Lawn
and
Garden
-
110
and
112
Fuel
Syst
e m 30
8M
-2059-(Apr-67)
Carburetor
-
110
Tractor
10-
1
Gr oup
10
C
ARBUR
E
TOR
11
0 T RA
CT
OR
GENERAL
INFORMATION
..
'
..
H ;
''''
Fig.
I-Cutaway
View
of
Carburetor
Fuel
enters
the
bowl
through
a
valve
con-
trolled
by
the
float,
Figure
1.
Air
entering
the
carburetor
is
controlled
by
the
choke
valve
when
starting.
The
air-fuel
mixture
entel"ing
the
en-
gine
is
regulated
by
the
throttle
valve
which
maintains
uniform
engine
speed
under
varying
loads,
as
controlled
by
the
g-overnor.
Whenever
the
throttle
is
opened
quickly
to
give
extra
power
for
a
sudden
load,
an
extra
amount
of
fuel
is
required
for
a
momentarily
richer
air-fu
el
mixture.
The
accelerating
well,
Figure
1,
provides
the
extra
fuel.
Th
e
carburetor
has
two
adjusting
needles;
one
for
high
speed
and
the
other
for
low
or
idle
speeds,
Figure
1.
The
high
speed
mixture
needle
controls
the
amount
of
fuel
entering
the
venturi
at
high
engine
speeds.
The
idle
mixture
needle
controls
the
amount
of
fuel
entering
the
venturi
when
engine
is
idling
or
when
throttle
valve
is
in
the
full
closed
po-
sition.
REPAIR
When
dia
g
nosis
indicates
the
carburetor
should
be
cl
e
an
ed,
disassemble
the
carburetor
before
placin
g
it
in
the
cleaning
solution
to
m
ak
e
Sure
th
e
solution
r
ea
ches
all
surfac
es
and
pa
rt
s.
Always
inst
a
ll
all
the
pa
rt
s
in
the
r e
pair
kit
when
the
carbur
e
tor
ne
ed
s
servi
cin
g. Al
wa
ys
install
new
g
askets
whenever
the
carburetor
is
disassembled
even
though
no
other
new
pa
r
ts
are
installed.
DISASSEMBLING
CARBURETOR
Remove
carburetor
from
vngine
and
remove
air
cleaner
base.
Remove
fuel
bowl,
float
needle
and
ne
edle
seat.
Remove
high
spee
d
and
idle
mixture
needles.
Remove
screw
s
holding
throttle
valve
. R
e-
move
valve
and
s
haft
from
carburetor
housing-.
Remove
choke
valve,
choke
shaft
retaining
ball
and
spring.
CAUTION:
Place a rag over end
of
choke
shaft opposIte choke shaft
lever
to
pre-
vent retaining ball
from
flying out
when
shaft is removed.
CLEANING
CARBURETOR
Clean
all
parts
in
a
carburetor
cleaning
sol-
vent.
CAUTION:
Never
clean holes
or
passages
with small
drill
bits
or
wire,
as a slight
enlarge-
ment
or
burring
of these holes wIll change the
performance
of the
carburetor.
No
method of
cleanIng other than solvent should
be
used.
Place
carburetor
parts
in
a
suitable
basket
and
immerse
basket
in a
container
of
carburetor
cleaning
solution.
NOT
E:
Good
carburetor
cleaning
solutions
can
be
obtained
from
most
jobbers.
Agitating
the
basket
up
and
down
in
the
solution
will
speed
ulJ
action
of
the
solvent
and
aid
in
dissolving
de-
pOSits in small dYilled passages.
Litho
in
U.S.A.