8-2-1
THROTTLE SYSTEM
1)
Remove the Philips screw (27) and throttle valve (22), and
pull
out the throttle shaft (23).
2)
The spring
(24)
can be taken out by removing the throttle stop screw
(25).
*Exercise care not to damage throttle valve ends.
8-2-2
CHOKE
SYSTEM
1)
Remove the Philips screw
(14)
and choke valve
(1
9,
and pull
out
the choke shaft
(1
6).
2)
When reassembling the choke shaft, make sure that the cutout in the choke valve faces the main air jet.
Meantime, when reassembling the moderation regulating ball (20) and the spring (21), set these parts at the
right
positions with the rings
(1
8)
and (19) and then reassemble.
8-2-3
PILOT
SYSTEM
1)
Remove the pilot jet (26),
using
correct tool to avoid damage to it.
2)
Reassembly
Tighten the pilot-jet securely. Otherwise, the fuel may leak, causing engine malfunction.
8-2-4
MAIN
SYSTEM
1)
Remove the bolt
(1
2)
and take out float chamber body
(lo).
2)
Re-move the main jet (13) from the body
(6).
[In
case
of
EY28,
remove the main jet (13) from the pipe assy (29),
and then remove the pipe assy
(29)
and the nozzle (28) from the carburetor body
(6).]
3)
Reassembly
a) Fasten the main jet securely to the body. Otherwise, the fuel may become too rich and cause engine malfunction.
b)
The bolt tightening torque
is
70
kg-cm.
8-2-5
FLOAT SYSTEM
I
j
Pull
out the float pin
(9)
and remove the float
(8)
and needle valve
(1
7).
If
the needle valve need be replaced, replace
it
with rubber needle.
CAUTION:
When cleaning the jets, use neither
a
drill
nor
a wire (because of possible damage
of
the orifice which will
adversely affect fuel
flow).
Be sure to use compressed air
to
blow them clean.
2)
When removing the needle valve and floats, gently tap the reverse side using the
rod
more slender than the float
pin
and remove because the float pin is calked
to
the carburetor body.
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44
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