17
CA
RBU
R E T O R
PL
ATE No. C-
17-4
6
Functioning as it does to
pr
ovide an
ef
ficie
nt
fuel mixture over wide
rang
es
of load and speed. and having to
tak
e
in fuel which may have impurities in
it. it is only reason able
that
a little
att
ention should be paid to the
car
-
bur
etor.
PLATE
No.
C.I746
•
CARBURETOR
(1)
AD
JUSTMENT
-High
Speed J et
as
indi
cat
ed by
arrow
(1).
This
ad
ju
stm
ent is
pr
ovided to take
car
e of d
iff
er
ent
fuels and oper-
ating
conditions and while a
new engine requires a slightly
rich
er
m
ixtur
e. the op
erator
will soon find
that
the tractor
perfo
rms
best with the
scr
ew
fr
om 1 to 1%
turns
open. This
adjustm
ent
can best be p
er
-
formed with the
tra
ctor
at
nor-
mal working t
emperatur
e and und
er
load.
and
aft
er
a few
tri
als the correct posi-
tion will be found. Nothing is to be gained by
operating
with too lean a mixture
as power is lost and the engine will
run
warmer
.
If
the
carburetor
is
thought
to be
dirty
remove
the
carbur
etor. dissemble
it
by re-
moving the
four
scr
ews holding
the
body halves tog
ether
and wash
car
efully in
gasoline.
If
it is nec
essar
y to remove
the
je
ts do so v
ery
car
efully, as even the
slightest
damag
e to the j
ets
will
throw
out the calibration of the
carbur
etor.
These jets should be blown
out
with
air.
DO NOT use a
wir
e. Reassemble
car
efully,
being
sure
that
all gaskets
ar
c in place, screws
tight
and
the
air
tube to the clean-
er carefully installed
and
checked
for
air
leaks.
(3)
Op
erat
ing
In
structions for Cockshutt "30" Tractor
Idle Adj
ustment
as indicated by
arrow
(3). The t
hro
ttle
adj
usting
scr
ew should
f
irst
be set to give a slight increase in idle speed then t
urn
the idle ad
justing
screw as indicated by
arrow
(2) in
or
o
ut
to give a smooth idle. Then re
-adjust
the
th
ro
ttl
e
adjust
ing
screw to give
the
c
orr
ect idle speed.
Float Level
- With
throttl
e body and bowl cover assembly inverted.
the
distance
from the gasket
surfac
e to
nearest
edge of float is 9/ 32". To
adjust
bend levers
midway between float valve
and
floats.
CLEANING OF CARBURETOR -
Every
100 to 200 hours. depending upon op
erating
conditions, remove the
dra
in plug, all ow some gasoline to
run
out and then re-
place. .
(2)
•
•
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