Use and Care Manual

MAINTENANCE EB770RT

34 X7531127000

If the engine is adjusted for operation above 1,100 feet ASL, the

carburetor must be re-adjusted when operating the engine below

1,100 feet ASL, otherwise severe engine damage may result.

Level 2.

Note: Every unit is run at the factory and the carburetor is set in

compliance with emission regulations. Carburetor

adjustments, other than idle speed, must be performed by an

authorized ECHO dealer.

Idle Adjustment

Before adjustment make sure that:

• Air filter is clean and properly installed.

• Spark arrestor screen and muffler are free of carbon.

• Blower pipes are installed.

1. Start engine, run at idle for one minute.

2. Complete warm up by running at full throttle for 5 minutes, operating

choke twice to clear air from carburetor chambers.

3. Check idle speed and reset if

necessary. If a tachometer is

available, idle speed screw (A)

should be set to the

specifications found on

“Specifications” Page of this

manual. Turn idle screw (A)

clockwise to increase idle speed;

counter clockwise to decrease

idle speed.

Throttle Cable Adjustment

Level 1.

If engine idle speed changes when blower pipe is moved, or engine will not

reach full wide open throttle speed, adjust throttle cable.