Echo SRM-2100SB, SRM-2400SB OPERATOR'S MANUAL 25

GRASS TRIMMER/BRUSH CUTTER

OPERATOR'S MANUAL 25

Level 2.

Tools required: Screwdriver, Tachometer (ECHO P/N 99051130017)

Parts required: None.

NOTE

Every unit is run at the factory and the carburetor is set in compli-

ance with emission regulations. In addition, the carburetor is

equipped with HI and LO needle adjustment limiters that prevent

settings outside acceptable limits.

1. Before adjusting the carburetor, clean or replace the air filter and

spark arrester screen.

2. Trimmer line must be extended to the cut-off knife.

3. Start engine and run for several minutes to reach operating tempera-

ture.

4. Stop engine. Turn HI speed needle (C) CCW (counter clockwise) to

stop. Turn LO speed needle (B) midway between full CCW and CW

(clockwise) stops.

5. Idle Speed Adjustment.

• Start engine and turn “idle” speed adjustment screw (A) CW

until the cutting attachment begins to turn, then turn the screw

CCW until cutting attachment stops turning. Turn screw CCW

an additional 1/4 turn.

6. Accelerate to full throttle for 2-3 seconds to clear excess fuel from

engine then return to idle. Accelerate to full throttle to check for

smooth transition from idle to full throttle. If engine hesitates, turn

LO needle (B) CCW an additional 1/8 turn and repeat acceleration.

Continue adjusting until smooth acceleration results.

7. Check HI speed RPM at W.O.T. (Wide Open Throttle). HI speed

RPM should be set to specifications found on page 11 "Specifica-

tions" of this manual.

8. Check idle speed and reset if necessary. If a tachometer is available,

idle speed should be set to the specification found on page 11

"Specifications" of this manual.

When carburetor adjustment is completed, the cutting attachment

should not turn at idle, otherwise serious personal injury may result.

SRM-2100SB