Echo CS-260TES Service Manual

SERVICE INFORMATION
CS-260TES
CS-270WES
10
2-3 Adjusting carburettor
1. Start engine and warm it up well for 70 seconds
as follows.
(1) 5 seconds at idle and 5 seconds at WOT.
(2) 5 seconds at idle and 5 sedonds at WOT.
(3) 5 seconds at idle and 10 seconds at WOT.
Repeat above (1) to (3) again.
2. Using 2.5 mm wide blade screw driver, adjust L
mixture needle to obtain maximum idle speed.
3. Set idle speed to 4,400 r/min by turning idle ad-
just screw.
4. Turn L mixture needle anticlockwise to reduce
engine idle speed 1,000 to 1,100 r/min to set idle
speed in the range of 3,300 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 until en-
gine speed drops to approx. 11,000 r/min. Turn H
mixture needle 1/8 turn increments clockwise at
idle engine speed, then squeeze throttle trigger
and check WOT engine speed. If the WOT engine
speed is less than 11,500 r/min, turn H mixture
needle 1/8 turn clockwise again, and check WOT
engine speed. The fi nal WOT engine speed should
fall within the11,700 to 12,300 r/min range.
NOTE :
During H mixture needle adjustment, do
not run engine at high speed without load longer
than 10 seconds.
6. After adjusting carburettor, put new limiter cap
on the other side of limiter cap tool as shown, and
press the limiter caps to the bottoms on L and H
mixture needles respectively.
NOTE :
Align the limiter cap’s tabs (A) with locat-
ing slots (B) in extended housing of carburettor.
IMPORTANT : The limiter caps must be in-
stalled L and H mixture needles to comply with
Emission Directive.
7. Start engine again and make it sure engine
runs at idle speed in the range of 2,800 to 3,600
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.
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 ig-
norable.
H
L
(A)
(B)
(B)
(A)
L
H
idle adjust screw

Echo CS-260TES Specifications

General

Brand	Echo
Model	CS-260TES
Category	Chainsaw
Language	English