9-1-2
DISASSEMBLY
AND
REASSEMBLY
A
part from mechanical failures, most of the
carburetor troubles are caused by an incorrect
mixing
ratio, which may arise mainly due to a
clogged
up
air
or
fuel passage in the jets,
or
fuel
level variations.
In
order to assure proper
flow
of
air
and
fuel,
the
carburetor must be kept clean at all times.
The carburetor disassembly and reassembly pro-
cedures are
as
follows
:
(See Fig.9-3.)
1)
THROTTLE
SYSTEM
a)Remove the Phillips screw
(1)
and throttle
valve
(2),
and
pull
out the throttle shaft
(3).
b)The spring
(4)
can
be taken out
by
removing
the
throttle stop screw
(5).
*
Be
careful
not to damage the throttle valve
ends.
2)
CHOKE
SYSTEM
a) Remove the Phillips screw
(6)
and choke valve
(7),
and pull out the choke shaft
(8).
b)
When reassembling the choke shaft, make sure
that the cutout in the choke valve
faces
the
main air jet.
3)
MAlN
SYSTEM
a)Remove the bolt
(9)
and take out the float
chamber body
(10).
b)From the body remove the main nozzle
(11)
and then remove the main jet
(12)
from the
main nozzle
(11).
a)Fasten the main jet securely to the body.
Otherwise, the fuel may become too rich and
cause engine malfunction.
c)
Reassembly
b)The
bolt
tightening torque is
5
ft
lb
6
17
3
1
13
10
Fig.
9-3
n
'\
,)
(7Okgf-cm). Be sure to set
the
gasket
(13)
and
washer
(14)
for chamber
(10).
4)
FLOAT
SYSTEM
a) Pull out the float
pin
(15)
and remove the float
(16)
then the clip
(17)
and needle valve
(18).
CAUTlON
:
When cleaning the jets, use neither
a
drill
nor
a
wire (because
of
possible damage
to
the orifice
which
will adversely affect
fuel
flow).
Be
sure
to
use
compressed
air
to blow them
clean.
b)When
removing
the
needle valve and float, gently tap
on
the reverse side
using
the rod more slender
than the float pin and remove, since
the
float pin
is
calked to the carburetor body.
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40
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