GRASS TRIMMER/BRUSH CUTTER
OPERATOR'S MANUAL
31
C
D
E
B
SRM- 3100S, 3400 Type 1/1E
1B. Remove three (3) screws retaining muffler cover (B).
All Models
2. Place piston at Top Dead Center (TDC) to prevent carbon/dirt
from entering cylinder.
3. Remove screen holder (C), gasket (D) and screen (E) from muffler
body.
4. Clean carbon deposits from screen and muffler components.
5. Replace screen if it is cracked, plugged or has holes burned
through.
CARBURETOR ADJUSTMENT
Emissions Models (With Limiter Caps)
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 EPA Phase 1 and California 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
temperature.
4. Stop engine. Turn HI speed needle (A) 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 (C) CW
until the cutting attachment begins to turn, then turn the screw
CCW until attachment stops turning. Turn screw (C) CCW an
additional 1/4 turn.
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