SERVICE INFORMATION
4
SRM-2620ES, SRM-2620TES
T262XS, C262S
T262TXS, C262TS
Carburetor: WYG-9
L mixture needle
H mixture needle
Throttle adjust screw
Throttle plate
Engine side
1-2 Technical data (continued)
Model
SRM-2620ES
T262XS, C262S
SRM-2620TES
T262TXS, C262TS
Carburettor adjustment
Cutting head preparation
Nylon line cutter F4 Z5
Line length (w/o shield)*
1
190 mm 285 mm
1) Initial setting
H mixture needle turn out 3
L mixture needle turn out 3 1/8
Throttle adjust screw turn out*
2
7 3/4
Engine warm-up Idle - WOT : Total sec. 10 - 50 : 180
2) Find idle maximum speed Adjust L mixture needle to maximum idle speed*
3
3) Set idle maximum speed w/ TAS r/min 4,000
4) Set idle speed
by turning L mixture needle ACW
r/min 3,000 (2,700 - 3,500)
5) Find WOT maximum speed Adjust H mixture needle to maximum WOT speed
6) WOT setting r/min
Turn H mixture needle ACW
to decrease WOT speed by : 20 - 30
WOT engine speed with standard equipment 9,000 - 10,000*
10,400 - 11,800
r/min 11,000 - 11,900**
WOT: Wide open throttle ACW: Anticlockwise TAS: Throttle adjust screw
*
With Nylon line cutter and shield. ** With 3-tooth blade (230 mm).
*
1
From eyelet on nylon head
*
2
Turn TAS clockwise until its head touches boss. Then turn TAS anticlockwise.
*
3
If clutch engages during adjustment process 2), decrease engine speed by turning TAS ACW until clutch
disengages and then redo 2).
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