GRASS TRIMMER

OPERATOR'S MANUAL 23

CARBURETOR ADJUSTMENT

Engine Break-In

New engines must be operated a minimum duration of two tanks of fuel break-in before carburetor adjustments can be made. During the break-in period your engine performance will increase and exhaust emissions will stabilize. Idle speed can be adjusted as required.

High Altitude Adjustment

High altitude adjustment is not required for proper operation of this engine.

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 compliance and California Emission Regulations. In addition, the carburetor is equipped with a HI needle adjustment limiter that prevents 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 (A) CCW (counter clockwise) to stop.

5.Idle Speed Adjustment.

•Start engine and turn “idle” speed adjustment screw (B) CW until the blades begin to turn, then turn the screw CCW until blades stop 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 stops or stalls after full warm up return the unit to your authorized ECHO dealer for repair.

7.Check HI speed RPM at W.O.T. (Wide Open Throttle). HI speed RPM should be set to specifications found on page 12 "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 12 "Specifications" of this manual.

WARNING DANGER

When carburetor adjustment is completed, the cutting attachment should not turn at idle, otherwise serious personal injury may result.

A

B