Echo CS-420ES - Manual (Page 8)

SERVICE INFORMATION CS-420ES
8
2-2 Presetting idle adjust screw, L mixture needle and H mixture needle (continued)
2. Screw threaded end of limiter cap removal tool
91019 with 2.5 mm left-hand thread into center
hole of limiter cap anticlockwise until tab of the lim-
iter cap just comes out of the locating slot.
NOTE : DO NOT COMPLETELY REMOVE LIM-
ITER CAP FROM CARBURETTOR!
If the limiter cap is pulled out completely, there is
a chance that the other mixture needle would turn
and limiter cap tab would misalign with locating
slot when screwing the limiter cap removal tool
into center hole of the limiter cap. As a result, the
thread of the limiter cap would be stripped. Use
3 mm diameter thread wood screw to remove a
stripped limiter cap.
3. Remove the limiter cap removal tool from the
limiter cap by turning the tool clockwise, leaving
the limiter cap in place.
4. Screw threaded end of limiter cap removal tool
91019 into center hole of the other limiter cap anti-
clockwise until the limiter cap is removed from the
mixture needle. Remove the limiter cap from limiter
cap removal tool, and removal complete of first
limiter cap.
5. Turn L and H mixture needle clockwise until
lightly seated, and then turn out both mixture nee-
dles following turns.
L mixture needle : 1 3/8, H mixture needle : 2 3/4
NOTE : If needles are overtighted during seating,
damage to carburettor may occur.
6. Remove air fi lter cover and air fi lter to see that
idle speed screw contacts the throttle plate. Turn
idle adjust screw anticlockwise and set the screw
until the tip just contacts the throttle plate. Then
turn idle adjust screw 1 3/8 turns clockwise. Rein-
stall air fi lter, and cleaner lid.