How to Tune an Echo Leaf Blower

Set the leaf blower on a flat workbench. Locate the carburetor on the right side of the engine under the air filter.

Locate the three adjustment screws on the side of the carburetor; each will be marked on the blower housing. The low speed adjust screw is marked "L"; the high-speed adjustment screw is marked "H"'; and the idle adjustment screw marked "I" or "IDLE."

Turn the "L" screw clockwise until it lightly seats, then turn it counterclockwise 7/8 of a turn; turn the "H" screw clockwise until it lightly seats, then turn it counterclockwise 1 1/4 turns.

Start the engine and allow it to warm up for 2 or 3 minutes. Slowly turn the "L" screw clockwise and counterclockwise until there is a consistent idle and smooth acceleration. Readjust the "I" screw until the engine runs smoothly.

Advance the throttle to the "FAST" position; adjust the "H" screw clockwise until you hear a slight four-cycling sound, then turn it counterclockwise until the four-cycling sound is gone.