Echo SRM-2305SI - Manual (Page 8)

SERVICE INFORMATION
SRM-2305
SRM-2305SI
8
2-3 Adjusting carburettor
1. Start engine and warm it up well for about 3 - 5
minutes with cycle of 50 seconds at WOT (Wide
Open Throttle) and 10 seconds at idling.
2. Adjust L mixture needle and obtain maximum idle
speed with 2.5 mm wide blade head screw driver.
3. Set idle speed to the range of 3500 to 3600 r/min
by turning idle adjust screw.
4. Turn L mixture needle anticlockwise to reduce
idle speed 800 r/min to set idle speed in the range
of 2700 to 2800 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. Adjust WOT engine speed in the range of 8200
to 10000 r/min by turning H mixture needle.
6. After adjusting carburettor, install White limiter cap
on L mixture needle and Red limiter cap on H mixture
needle as shown.
NOTE : Before installing limiter caps, warm caps in
90
°
C hot water for smooth installation. Make it sure
to use pliers or appropriate instrument to take
warmed up cap out from the water.
7. Press respective limiter caps to the bottoms as
shown.
8. Start engine again and make it sure engine runs,
in the range of 2400 to 3200 r/min at idling and the
range of 8200 to 10000 r/min at WOT. Also make it
sure cutting device would not turn at engine idle
speed and suitable acceleration.