Echo CS-350WES - Manual (Page 10)

SERVICE INFORMATION
CS-350T
CS-350TES
CS-350WES
10
2-3 Adjusting carburettor
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 4,200 r/min (CS-350TES), 4000
r/min (CS-350WES) by turning idle adjust screw.
4. Turn L mixture needle anticlockwise to reduce
engine idle speed 1,000 r/min (CS-350TES), 800
r/min (CS-350WES) to set idle speed at 3200 r/min.
The idle speed is allowed in the range of 3,000 to
3,400 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 12000 r/min. Then
turn H mixture needle clockwise to obtain 12,800 to
13,200 r/min at WOT.
NOTE : Do not run engine at high speed without
load longer than 5 seconds, or engine damage may
occur.
6. If the engine speed at WOT is above 13,500 r/min
adjust H mixture needle anticlockwise and set
maximum engine speed at less than 13,500 r/min.
7. After adjusting carburettor, put new limiter cap on
the other side of limiter cap tool as shown, and install
new limiter caps on L and H mixture needles
respectively.
NOTE : Align the limiter cap’s tabs (A) with locating
slots (B) in extended housing of carburettor.
IMPORTANT : The limiter caps must be installed
L and H mixture needles to comply with
Emission Directive.
8. Start engine again and make it sure engine runs
at idle speed in the range of 2,900 to 3,500 r/min
and at WOT speed in the range of 12,500 to 13,500
r/min. Also make it sure chain would not turn at
engine idle speed and suitable acceleration.
NOTE : Initial carburettor setting (Idle adjust screw,
L and H mixture needles) shown here is to start the
engine after restoration or carburettor change. Idle
adjust screw, L and H needles turn for designated
engine revolution through procedures indicated here
may vary. As long as idle and WOT engine speed is
set in given range, variance would be ignorable.
H
L
(A)
(B)
(B)
(A)
L
H
T
idle adjust screw