9-2-3 PILOT SYSTEM.
..
1) Remove pilot jet (21) using a suitable tool while taking care not to damage it.
2)
Remove pilot screw
(25)
and spring
(26)
In reassembly:
.I
-.
.11
1) Tighten pilot jet and pilot plug firmly to prevent fuel leakage.
2)
Replace pilot screw if tapered end
is
damaged.
*
.
CAUTION:
DO
IQOT
OVERTIGHTEN.
9-2-4 FLOAT
SYSTEM
1) Remove guide holder
(5)
and float chamber (1 1).
2) Remove screw (14) and float arm
(8)
by taking out!float pin
(9).
CAUTION: TAKE CARE NOT TO DAMAGE FLOAT AND FLOAT ARM.
3)
Remove needle valve (7) and packing
(6).
CAUTION: WHEN REPLACING NEEDLE VALVE, REPLACE
IT
TOGETHER WITH VALVE SEAT WITHOUT FAIL.
In assembly:
Wash inside
of
float chamber with gasoline.
9-2-5 MAIN
SYSTEM
1)
Remove main jet
(4)
from guide holder
(5)
using a suitable tool.
CAUTION: TAKE CARE NOT TO DAMAGE
IT.
2)
Remove main nozzle
(3).
NOTE: In case
of
ECIO,
no need to remove main nozzle because
of
main nozzle being incorporated into carburetor body.
In reassembly:
1)
Tighten main jet securely to guide holder and tighten guide holder to carburetor body.
2) Tighten guide holder to
70
-
80
kg-cm
(5.5
lbs-ft).
A
too rich fuel mixture will result
if
not tightened securely.
9-3
ADJUSTMENTS
When the control lever is set at slow speed side, the engine should be operated on idling speed.
*The idling speed
of
engine is adjusted
in
the following sequence.
Specified idling speed:
EC05-2.
.............
1300 r.p.m.
*
100
..
EC25-2.
..............
1500r.p.m.
*
100
EC07-2
..............
1300 r.p.m.
k
100
EClO 1300 r.p.m.
f
100
.
EC17
.................
1300
r.p.m.
k
100
.-
...............
,
1) Adjust pilot screw by turning
it
counterclockwise by 1 turn (1
%
turn for Model EC17) after fully, closing
it
once.
CAUTION:
DO
NOT OVERTIGHTEN PILOT SCREW WHEN CLOSING IT FULLY. THE NEEDLE POINTMIGHTBE
DAMAGED
BY
OVERTIGHTENING.
2) THROTTLE STOP SCREW
Turn throttle stop screw clockwise until the specified idling speed is obtained.
If this speed exceeds specified idling speed, turn throttle stop screw counterclockwise.
..
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