Echo string trimmers are powerful enough to cut any type of grass, even St. Augustine and Bermuda grasses. They are lightweight and have ergonomic controls. Most problems with Echo string trimmers can be prevented with routine maintenance and are easily corrected.
Problems with the fuel or ignition system can cause an Echo string trimmer to not start properly. Gas that is more than 30 days old, lower than 89 octane, or contaminated with water may not provide enough spark to ignite the engine. Fuel lines should be not be cracked or kinked and fuel filters should be clean to allow a continuous flow of gas.
The sparkplug should be clean and not damaged and the wires should be tightly connected with no cracks. The sparkplug gap should be set between .24 to .26 inch for proper ignition. The air filter should be clean and the air box should be free of debris and dirt to allow sufficient airflow.
The on/off switch should be “on” and the choke should be in the “open” or “run” position. The starting trigger should be held down until the engine runs smoothly with little or no visible smoke from the exhaust system.
Other Engine Problems
If an Echo string trimmer is run at half-throttle, the unburnt fuel will build up in the muffler and produce smoke. The trimmer should be run at full-throttle. Low quality oil or the incorrect fuel to oil ration will also cause the trimmer to smoke. Echo Power Blend oil or the equivalent is recommend for Echo string trimmers. It should be added to the fuel at a 50:1 ration.
A dirty air filter, a damaged or dirty spark plug, or a clogged spark arrestor screen in the muffler can cause an Echo string trimmer to have low engine power.
Debris in the cooling fins or exhaust port can cause the engine on an Echo string trimmer to overheat and seize (stop running). Using the wrong type of oil or not enough oil can also cause the engine to seize. Old fuel can build-up in the piston rings so they will not move freely and the engine will seize.
Trimmer Head Problems
If the cutting head on an Echo string trimmer will not turn, the flexible cable on the head may be damaged. The engine housing should sit flush against the indicator line on the shaft for the cutting head to operate.
The trimmer should be operated at full throttle for the trimmer line to feed from the cutting head correctly. If the trimmer line is wound on the spool improperly or melted, the line will not feed right. If the trimmer is used too close to hard objects or if the middle of the line is used for cutting instead of the tips, the trimmer head can build up heat and melt the line. The trimmer line will not feed properly if the line advance cam or spring is worn or broken.