Echo is a 2-cycle line of lawnmower power tools. Ranging from line trimmers to leaf blowers and chain saws, the Echo line is historically known for having released the first hand-held leaf blower. 2-cycle equipment runs on a mixture of gas and oil, not only using this mixture for fuel but also as the engine's lubricant. As 2-cycle equipment starts to age, readjustment of the fuel mixture may be necessary. This mixture is controlled by the carburettor.
- Skill level:
- Moderately Easy
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Things you need
- Small Flat head screwdriver
Place the power tool on a flat surface.
On top of the engine is a removable plastic cover. Its located directly over the carburettor. Remove the cover, exposing the air filter.
Remove the air filter. If the air filter is dirty clean or replace it.
Reinstall the air filter and air filter cover. On the side of the carburettor are two small screws that are side by side. Below the screws stamped into the carburettor will be markings; one with an "L," this is the adjustment for the low or idle speed; the other with an "H," this is the adjustment for the high or full throttle.
Start the engine. As it idles take the small flat head screwdriver and adjust the "L" screw counter clockwise to increase the engine RPM's and clockwise to decrease the RPM's. Keep adjusting until the engine runs smoothly.
Advance the engine to full throttle. Adjust the "H" screw. Turn the screw counter clockwise to increase RPM's and clockwise to decrease the RPM's. Keep adjusting until the engine runs smoothly in the full throttle position.
Tips and warnings
- Over adjusting the "H" screw to get more power adds wear to the equipment, and may result in internal damage to the engine.
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