Adjusting Carburettor - Echo CS-8001 Service Data

CS-8001

2-3 Adjusting carburettor

idle adjust screw
SERVICE INFORMATION
1. Start engine and warm it up well for 2 -3 minutes
with cycle of 5 seconds at WOT (Wide Open Throttle)
and 10 seconds at idling.
2. Using 2.5 mm wide blade screw driver, adjust L
mixture needle to obtain maximum idle speed.
3. Set idle speed to 3,000 r/min by turning idle adjust
screw (in the range of 2,700 to 3,300 r/min allowable).
4. Turn L mixture needle anticlockwise to reduce
engine idle speed 500 r/min to set idle speed in the
range of 2,200 to 2,800 r/min.
NOTE : Engine speed must be allowed to stabilize
a minimum of 20 seconds after each adjustment of
L mixture needle to assure accurate tachometer
readings.
5. Turn H mixture needle anticlockwise at WOT until
engine speed drops less than 11,000 r/min.
6. Adjust WOT engine speed in the range of 11,500
to 12,500 r/min by turning H mixture needle clockwise.
NOTE : During H mixture needle adjustment, do not
run engine at high speed without load longer than
5 seconds.
7. If the engine speed at WOT is above 12,500 r/min,
adjust H mixture needle anticlockwise and set
maximum engine speed at less than 12,500 r/min.
8. After adjusting carburettor, put the limiter cap on
the tip of 2.5 mm wood screw and install the caps
on L and H mixture needles.
NOTE : Align the limiter caps tabs (A) with locating
slots (B) in extended housing of carburettor.
(B)
(A)
H
9. Tap the respective limiter caps in as shown.
10. Start engine again and make it sure engine runs
at idle speed in the range of 2,300 to 3,300 r/min
and at WOT engine speed in the range of 11,500 to
12,500 r/min. Also make it sure chain would not turn
at engine idle speed and suitable acceleration.
9
(A)
L
(B)