Echo CS-2511WES Service Manual

SERVICE INFORMATION
4
CS-2511WES
251Ws
1-2 Technical data (continued)
Carburetor adjustment
Fuel type
Mixed two-stroke
regular fuel
Mixed two-stroke
E10 fuel
Premixed
alkylate fuel
1) Initial setting H mixture needle turn out 1 3/4 2 2 1/4
L mixture needle turn out 2 1/2
Throttle adjust screw turn in*
1
1 1/2
*
1
Set Throttle adjust screw to the point that its tip just contacts throttle plate before initial setting.
IMPORTANT: Use
Tachometer PET-1000R to measure engine speed (Refer to 1-6 Special tools).
IMPORTANT: The PI controller installed model has 2 mode; Carburetor adjustment mode and Operation
mode. When adjusting carburetor, must be changed from Operation mode to Carburetor adjustment mode.
The mode will return to the Operation mode when the engine is stopped.
Tochangethemode,
1.Startenginewithoutbrakeactivated.(Do not touch throttle lever.)
2.Enginewarm-upwithfastidlefor120seconds.(The speed should be within 6,000 - 10,000 r/min. If it
is not, adjust the speed by turning H mixture needle.)
CAUTION: Chain will start to rotate during engine warm-up with fast idle.
NOTE: Do not stop engine during carburetor adjustment. If the engine is stopped, restart this procedure from
the beginning.
The carburetor adjustment continues.
Engine warm-up Idle - WOT : Total sec. 5 - 5 : 30
2) Conrm that the mode has changed
Conrm to vary the idle engine speed by turning L
mixture needle 1/4 turn CW. If the speed does not
vary, change the mode again.
(Theidleenginespeedreturnsto3,200r/minfora
fewsecondsinOperationmode,whentheengine
speed is deviated.)
3) Find idle maximum speed Adjust L mixture needle to maximum idle speed*
2
4) Set idle maximum speed w/ TAS r/min 4,100
5) Set idle speed by turning L mixture needle CCW r/min 3,300
6) Verify nal engine speed with standard equipment
Idle: 3,100 - 3,300
WOT: 12,800 - 13,400
r/min
If the WOT speed is not within above range,
readjust H mixture needle and reverify the speed.
If that does not work, adjust H mixture needle by
1/8 turn and reverify the speed.
7) Verify clutch engagement speed
Conrm clutch engagement speed.
If it is less than 1.25 times the idle speed,
adjust the idle speed by turning TAS CCW.
WOT: Wide open throttle CCW: Counterclockwise TAS: Throttle adjust screw
*
2
If clutch engages during adjustment process 2), decrease engine speed by turning TAS CCW until clutch
disengages and then redo 2).

Echo CS-2511WES Specifications

General

Brand	Echo
Model	CS-2511WES
Category	Chainsaw
Language	English