Echo Weed Eater How-to and Troubleshooting Guide

echo weed eater how to and troubleshooting guide

Echo Incorporated has built its reputation by specializing in heavy-duty commercial and easy-to-use consumer outdoor power equipment. Their gas-powered and electric string trimmer lines, also known as Echo weed eaters, are popular among amateur and professional landscapers.

These Echo weed eaters come in various models that can cut from light vegetation to thick bushes. Unfortunately, even string weed trimmers of a reputable brand may malfunction here and there.

Echo string trimmers are pretty durable, and their simplistic designs make it so much easier to fix in case of an issue. These problems can be as severe as engine and carburetor issues to easy fixes such as fuel and string issues.

We have combined Echo weed eater users’ most commonly reported cases and come up with an easy-to-follow troubleshooting guide you can use with a few simple tools.

How to string an Echo weed eater

Replacing the trimmer string is part of the routine maintenance of any weed eater. Unfortunately, all weed eaters or trimmers shed their string bit by bit as they cut grass and weeds until there isn’t enough string to operate it.

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Fortunately, an Echo weed eater has a pool design feature that makes it easy for anyone to replace the line without special tools.

Echo weeds eaters come in two types of trimmers heads. A self-feeding head unravels the string automatically as you work. On the other hand, a bump-feed head only advances the line when you bump the head on the ground.

But there is not much difference between the two options for string replacement. However, there are several different methods for replacing the line, depending on whether your trimmer is a single-line, dual-line or speed-feed model.

Changing the line on a speed-feed Echo weed eater

  • Shut off the weed eater engine and remove the wire on the spark plug to avoid the weed eater starting up accidentally.
  • Then place your weed eater on the floor with the head assembly up.
  • Remove the old string from the spool by pulling it out on one side.
  • Cut a 20-foot length of 0.095-inch-diameter Echo nylon trimmer string with scissors.
  • Hold the trimmer head in one hand turn the knob above the head to the left until the arrow on the knob aligns with the holes in the trimmer head. You should see from one end of the hole to the other.
  • Insert one end of the string through the hole on one side of the trimmer head. Then, route the string through the head and out of the hole on the opposite side.
  • Then pull the string through until the length of both is equal on both sides of the trimmer head.
  • Hold the bottom of the head with one hand and turn the knob above the head to the left. The string will start winding onto the spool inside the trimmer head.
  • Turn the knob until about 5 inches of string extends from both sides of the trimmer head.
  • Finally, reconnect the spark wire to the spark plug to ensure the unit works.

Changing the line on a single-line Echo weed eater

  • Cut about 25 inches of your trimmer line.
  • Switch off your weed eater and ensure the gearbox has cooled down before touching it.
  • Press the tabs on the side of the retaining cap, then lift it from the trimmer head. Then remove the spool from inside the trimmer head.
  • Locate the starter hole in the spool, then insert one end of the trimmer line and wind it in the direction of the engraved arrows on the spool. Wrap the string in straight rows to prevent jams during operation.
  • Leave about 5 inches of excess string and snap it into the retainer on the spool to hold it in place.
  • Align the retainer side of the spool with its slot on the edge of the head. Place the spool into the trimmer head, then pull out the string from the retainer and route it through the slot on the cap head.
  • Reattach the retaining cap onto the trimmer head.

Changing the line on a dual-line Echo weed eater

A dual-line feeder has two holes on the spool and two slots at the edge of the trimmer head instead of one. There is also a separate wall to control these two strings.

  • Cut about 25 inches of your desired trimmer line.
  • Switch off your weed eater and ensure the gearbox has cooled down before touching it.
  • Press the tabs on the side of the retaining cap, then lift it from the trimmer head. Then remove the spool from inside the trimmer head.
  • Locate the starter hole in the spool, then insert one end of the trimmer line and wind it in the direction of the engraved arrows on the spool. Wrap the line in straight rows to prevent jams during operation. Leave about 6 inches of excess string, then attach to the retainer.
  • Repeat the last two steps with the second line and attach it to the other end of the retainer. Again, both strings should be on opposite sides of the spool, matching the trimmer head slots.
  • Align the end of the lines with the slots on the head, then feed them through the slots.
  • Return the spool into the trimmer head and pull both lines simultaneously to see if they work smoothly.
  • Replace the retaining cap onto the trimmer head.

Signs that it’s time to change the string on your Echo weed eater

Ideally, you need to replace the string on your Echo weed eater when it runs out, breaks, or wears down. You will tell when the weed eater string needs changing when it stops trimming the weeds effectively.

A string that is old or exposed to the elements over time can become brittle and needs replacing as well.

What size of the string to use on an Echo weed eater?

The size of the string is the most significant factor to consider when choosing the right option for your weed eater and job. Weedeater strings come in various diameters and shapes to cater to different uses. Having the correct string for the job and your weed eater helps you do more work with less effort.

The Echo weed eater’s ideal string size is the round 0.095 inches in diameter.

The general rule of thumb is that lines from 0.065 to 0.080 inches are for lighter-duty work, whereas strings of 0.085 to 0.105 inches are appropriate for medium-duty yards with thicker vegetation.  

Strings with greater diameters than 0.110 inches are great for heavy-duty jobs and woody plants.

How to start the Echo weed eater

The starting procedure for the Echo weed eaters varies depending on the model because of the variation in design and position of the buttons and levers. However, the guidelines below apply to all two-stroke engine gas-powered string trimmers.

  • Wear your protective gear, including the non-slip heavy-duty gloves, goggles, and facemask.
  • Refill the fuel tank with properly mixed fuel or commercial pre-mixed fuel for 2-stroke engines.
  • Push the on/off switch forward to turn on the ignition switch.
  • Place the choke lever at the rear of the powerhead in the ‘Cold start,’ or the choke closed position. A slanting horizontal line icon usually indicates this position.
  • Pump the prime bulb several times until you see fuel flowing through the clear fuel line. Then pump the bulb an additional five times.
  • Place the weed eater on a level surface away from hard objects like rocks and pavements. The engine should stay up while the fuel tank is at the bottom.
  • Hold the throttle trigger with your left hand and squeeze the throttle trigger at the bottom of the grip to open the throttle.
  • Pull the recoil starter rope rapidly several times until the engine fires. Then, pull the starter rope about five-time and if the weed eater doesn’t start, repeat the starting procedure from the beginning.
  • When the engine starts running, push the choke lever to the ‘Run’ position(choke open), usually indicated by a vertical line or a flat horizontal line, depending on the model.
  • Squeeze the throttle trigger again until the engine runs, then release the throttle trigger immediately to allow the engine to idle for a few minutes.
  • After the engine becomes warm, slowly depress the throttle trigger until the engine runs at operating speed.
  • When warm starting your weed eater, use the same procedure but do not close the choke. All the other steps apply. Priming is only necessary when cold starting your power tool.
  • When you finish using the weed eater, release the throttle trigger and wait for the engine to shut off. Then press the on/off switch to the off position.

How to adjust a carburetor on an Echo weed eater

The carburetor mixes the fuel and air mix before sending it to the engine for combustion. Your weed eater requires a precise mixture for it to function smoothly. If your Echo weed eater is stalling, sputtering, or having power loss while working, then the carburetor needs adjusting.

The carburetor is probably not maintaining proper fuel and air mixture to maintain sufficient engine speed, affecting the weed eater’s performance.

The carburetor adjustment screws are on the engine and the components responsible for setting this mixture.

As the engine vibrates, these screws become loose over time. Also, the carburetor is factory-adjusted for sea level, and if you use your weed eater at high altitudes, it may not get enough air for proper combustion.

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Adjusting the screws regularly ensures the engine receives the appropriate fuel and air mixture to run the weed eater. Follow the steps below to adjust the carburetor on your Echo weed eater.

Adjustment preparation

  • First, locate the three carburetor screws on your Echo trimmer. You are likely to find them around the area where the primer bulb is attached to the carburetor. Each screw has a letter beside it; ‘H’ is for high speed, ‘L’ is for low speed, and ‘I’ is for idle speed.
  • Start your weed eater and allow the engine to run for several minutes until the fuel tank is empty. Then, stop the trimmer and replace the fuel filter. Use a piece of 14-gauge wire to remove the old fuel filter from the fuel line.
  • Insert the new fuel filter into the gas tank refill the tank with the proper fuel/oil mixture for your weed eater model.
  • Replace the air filter.
  • Clean the cooling fins with a stiff paintbrush.
  • Remove the spark arresting screen from behind the muffler and clean it with a toothbrush. You can replace the screen if it is too damaged.

Idle adjustment screw

  • If the engine starts but doesn’t idle once you release the trigger throttle, turn the idle adjustment screw clockwise to increase the idle speed; and counterclockwise to decrease the idle speed.
  • Ensure the idle adjustment screw reading falls within the specifications of your weed eater model. Next, clamp a tachometer onto the spark plug wire; the tachometer reading should be between 2,400 RPM to 3,200 RPM.

Low-speed adjustment screw

  • Depress the throttle trigger and rev the engine to full throttle for about three seconds. Release the throttle and then slowly squeeze the trigger again to full throttle. If the engine hesitates during acceleration, adjust the low-speed screw.
  • Use a Phillips head screwdriver to turn the low-speed screw clockwise to the leanest fuel setting.
  • Then turn the low-speed screw counterclockwise one-quarter turn and mark this setting.
  • Turn the screw again counterclockwise until the engine makes a bubbling noise. This is the weed eater’s richest fuel setting. Then turn the screw clockwise one-quarter turn and mark this setting.
  • Fine-tune the screw by setting it between the rich and lean fuel settings. Then listen for the best sound for your engine. Your engine’s sound should be smooth.

High-speed adjustment screw

  • Turn the high-speed screw counterclockwise as far as it will go.
  • Open the throttle all the way and adjust the high-speed screw until it falls within the specification of your weed eater model.
  • Use a tachometer and ensure high-speed adjustment reading is between 6,800 to 7,500 RPM.

What is the fuel mixture for Echo weed eaters?

Similar to other gasoline-fueled trimmers, the Echo weed eater with a 2-cycle engine uses a fuel mixture that must meet specific standards. The 2-cycle weed eaters have one fuel tank where the oil and gas mix.

The engine burns the gas for power, and simultaneously, the oil lubricates the engine as it burns it along with the gas.

The proper ratio for the fuel components is essential to prevent engine problems. Echo recommends using fuel in the ratio of 50 parts gasoline to 1 part oil. The oil should be ISO-L-EGD, and JASO M345 FD certified.

You should use the oil with a mid-grade (89 octane) or premium (93 octane) gasoline in all 1997 and newer engines. The gas should also contain a maximum of 10% ethanol since ethanol burns hotter than gasoline.

To get this fuel ratio, mix 2.6 ounces of oil for each gallon of gasoline. Mix the fuel separately and then stir it slowly to allow the contents to blend uniformly. Do not shake or stir the fuel aggressively. Then pour the mixed fuel into your weed eater’s fuel tank.

Echo weed eater will not run full throttle.

Sometimes your weed eater will start and idle correctly but dies when you give it gas. This is usually a sign that the engine is not receiving sufficient fuel or air, which causes poor combustion. Below is the troubleshooting process to get your Echo weed eater to run at full throttle.

Poor weed eater operation

Improper operation of the weed eater can cause it to bog down during acceleration. Starting the weed eater wrongly and overusing the choke is a common mistake most first-time users make with the weed eater. Here’s how to cold-start your weed eater correctly:

  • Move the control to the ‘Start’ position and turn the choke on by moving the lever to the ‘Choke’ position. The choke will restrict airflow to the carburetor, producing a fuel-rich mixture in the combustion chamber.
  • When the weed eater starts, move the choke to the off position to open the carburetor for more airflow.

If you do not do this, the engine will sputter and bog down when you open the throttle since there is much fuel is in the combustion chamber for the engine to ignite.

If you have a faulty choke that moves quickly or has stuck in the full position, you will need to replace it.

Clean the air filter

The air filter sits just above the carburetor and cleans all the incoming air of dirt and dust. If the air filter is clogged, there will be no sufficient air to mix with the fuel. As a result, the weed eater will have poor acceleration and won’t run properly at full speed.

  • Take the filter out and clean it with soapy water, rinse it under clean water and let it dry completely before replacing it.
  • If the filter is too clogged or has large holes, replace it.

Check the fuel filter.

There is likely restricted fuel flow when your weed eater starts but dies when accelerating it.

  • Over time the fuel filter will accumulate the dirt it traps from the fuel and become too clogged to a point it only allows a small amount of fuel through. The fuel passing through may be enough to start the engine and idling, but not for full throttle.
  • Remove the filter and clean it with soapy water. If it is too damaged and old, replace it.

Fuel issues

The fuel quality that your gas-powered weed eater uses is crucial in its operation.

  • First, check the fuel tank and ensure you have enough fuel in the tank.
  • If sufficient fuel is in the tank, ensure the primer bulb fills appropriately before starting the engine. Check the condition of the primer bulb and replace it as necessary.
  • The primer bulb can dry and crack over time so ensure it is not sucking in air when you depress it.
  • Always use freshly mixed fuel that is no older than 30 days. Dump out any old fuel from the tank, rinse the tank with a bit of fresh gas, and brush to clean the walls.
  • Check the mixture of your fuel. Ensure you’re using gas that is ethanol-free or has at most 10% ethanol.
  • If you’re not very sure about mixing the fuel yourself, you can always buy commercial pre-mixed fuel for a 2-stroke engine.

Check the carburetor

  • First, you need to check if the carburetor is clogged. When you leave fuel in the tank for too long, it evaporates and leaves a gummy residue which clogs the carburetor and restricts sufficient fuel to mix with the air and go to the engine for combustion.
  • So take out the carburetor and use some commercial carburetor cleaner to get rid of the gunk from the carburetor.
  • If your weed eater is new and having issues with revving up, the carburetor screws could be out of adjustment.
  • The carburetor comes factory-adjusted for operation above 1,100 feet at sea level; however, it will need readjusting when operating it at higher altitudes.
  • Adjusting the carburetor correctly ensures the engine picks up speed at can stay on full throttle.
  • Check if the flaps of the diaphragm in the carburetor are bent or worn out. You can fix them using a carburetor repair kit if necessary.

Check for a clogged exhaust.

Check the spark arrestor screen inside the muffler. This screen helps prevent sparks from flying the engine and igniting fuel vapors. Unfortunately, the spark arrestor screen becomes clogged with carbon and causes a lack of power and poor acceleration over time.

  • Remove the screen and inspect it. To clean the screen, use a small butane torch to burn off the carbon from the screen.
  • Ensure there are no fuel or fuel vapors or other flammable materials within 20 feet.
  • Then use a nylon brush to remove any carbon residue on the screen. Do not use an abrasive brush to clean the screen.

Why does my Echo weed eater bog down?

There are various reasons why your Echo weed eater’s engine is bogging down during operation. Go through the troubleshooting steps below to figure out the source of the issue.

Dirty air filter

Your weed eater’s engine can lose power if no air is mixing with the fuel. In addition, a clogged air filter can affect proper airflow causing the engine to stall.

Remove the air filter and inspect its condition. If it is dirty, wash it with warm water and dish soap. Rinse it thoroughly, then allow it to dry completely before replacing it in your weed eater.

Fuel issues

Insufficient fuel is another common reason your gas weed eater is bogging down.

Check the amount of fuel in your fuel tank.

  • If you have enough fuel, examine the fuel lies. When the fuel lines are damaged or disconnected, the engine is not getting enough fuel for proper functioning.
  • Ensure the fuel you use is fresh. Do not use fuel that is more than three months old.
  • This is because old fuel is too viscous and won’t move freely through the engine’s carburetor, preventing it from having sufficient power.
  • Also, shake the fuel mixture gently before filling your fuel tank since the gas and oil usually separate with time.
  • Several attempts at starting your weed eater can cause the engine to flood with fuel, making it unable to start correctly. Fix this issue by draining out the excess fuel.

Spark plug issues

Even with insufficient air and fuel, your Echo weed eater should react when starting. If the engine doesn’t even sputter, you’re dealing with a faulty spark plug. A dirty spark plug can cause your trimmer not to start.

Remove the spark plug and clean it with some gasoline and brush. Check the spark plug for cracks and dents and replace it if damaged.

Electrical problems

If you have an electrical Echo weed eater:

  • Start by checking whether the extension cord works and firmly connects to a working electrical outlet. If the extension cord is damaged, replace it.
  • Check the circuit breaker or fuse that powers the electrical outlet to your weed eater if the extension cord is working. Reset any tripped breakers or replace any blown fuses.

Carburetor issues

The low and high adjustments screws on the Echo weed eater could be causing your engine to bog down. Ensure you have set them correctly in the correct positions.

Make half-turn adjustments in the opposite directions on both screws to find the best position, then keep testing the engine in between turns. The engine should start running when you set the screws in the most suitable position.

Why does my Echo weed eater keep turning off?

Stalling is a common problem with weed eaters. The most common causes for your weed eater dying are insufficient air intake, fuel issues, issues with the carburetor, or exhaust problems. Follow the troubleshooting steps to identify the problems and stop your Echo weed eater from turning off.

Poor quality fuel

The quality of fuel you use can significantly affect the weed eater’s engine performance. If you’re manually mixing the fuel on your own, ensure you’re using ethanol-free gas and the proper ratio of gas to oil, which is 50:1.

Ethanol damages the engine slowly over time, and you’ll start to notice signs of damage such as stalling or having trouble starting and revving.

Try draining the fuel from the tank and refilling your weed eater with premium pre-mixed fuel.

Defective spark plug

The spark plug should deliver a high enough spark of electricity to ignite the fuel at the correct temperature to keep the piston and crankshaft moving. A faulty spark plug will not have enough charge; it will interrupt the combustion process, shutting down the engine.

Take out the spark plug from the engine, then ensure the tip isn’t oxidized or fouled. Remember to replace the spark plug at least once a season.

Poor storage

One sure way of preventing issues with your weed eater is proper storage. First, drain the fuel from your weed eater before storing it for a significant length of time. The fuel mix will go stale, separate, and leave a thick, gummy residue that clogs the fuel lines, fuel filter, and carburetor.

Before storing, a quick clean will also ensure the parts function well after prolonged storage.

The clogged parts will cause your weed eater to keep turning off during operation.

Foul spark arrestor

The spark arrestor becomes clogged with soot over time, causing the engine may shut down. Remove the spark arrestor and clean it with a non-abrasive. You may also have to replace its spark arrestor.

Clogged carburetor

If you leave fuel in your weed eater for a long time, it ends up clogging the carburetor. A clogged carburetor causes the engine to stall. If the carburetor is clogged, try cleaning it with a carburetor cleaner. If cleaning the carburetor isn’t effective, rebuild or replace the entire carburetor.

Echo weed eater head not spinning

The reasons that cause a gas weed eater head not to spin are the same reasons that a gas weed eater won’t stop spinning. Weed eaters have a centrifugal clutch that disengages the engine flywheel from the drive shaft when the engine is on idle.

When the clutch spring wears out, it won’t retract, and the head won’t stop spinning. When the clutch slips due to wear, the head won’t spin at all. Either way, there is usually a problem in the clutch system if the engine is running and the head is not working correctly.

Here’s how to fix this issue and get your weed trimmer head spinning again.


If the clutch has broken or the springs do not have tension, the clutch may not engage the driveshaft to rotate the trimmer head. Access the clutch inside the engine and check for any damage. You can repair the damage but replacing the clutch assembly gives better results in the long run. It is also relatively easy and inexpensive.


The driveshaft is a component that connects the clutch to the trimmer head and also transfers torque, causing the head to spin. If the drive shaft is broken or disconnected, the weed eater head will not turn. Since the drive shaft is not repairable, you’ll have to replace it. When replacing it, make sure the connection is secure; otherwise, it won’t work.

Trimmer’s head

If the threads on the drive shaft have worn out, the trimmer head will not attach properly to the shaft. Therefore, you will have to replace both the trimmer head and the drive shaft.

Throttle cable

The throttle cable connects the throttle trigger to the carburetor. When you pull the line, it opens the throttle on the carburetor to accelerate the engine. If this cable has broken, the engine will not accelerate, and the trimmer head will not spin. Inspect the throttle cable and if it is damaged, replace it.

Echo weed eater 2100 won’t turn on.

Echo released the Echo SRM-2100 grass trimmer model in 1999, but they discontinued it. When your Echo 2100 won’t turn on even after using the correct starting procedure, there are a couple of repairs you can do before giving up on it.

For replacement parts for it, you can get them from third-party vendors. Here is a simple troubleshooting guide for your Echo 2100 weed eater.

Restricted airflow.

If your start your weed eater and it sputters but won’t rev up, there’s a good chance the air filter or spark arrestor are clogged. Usually, a clogged air filter will allow enough air to start the engine but not enough to turn it over.

  • If the air filter is too clogged, the engine will not start as there will be no air to support combustion.
  • Remove the air filter and clean it. If it is too damaged, replace it.
  • The spark arrestor is a screen that prevents sparks from escaping the engine. When the screen has clogged with soot, it prevents carbon from leaving the engine, causing it to suffocate.
  • Remove the spark arrestor and brush off the soot with a non-abrasive brush but replace it if it is too clogged.

Spark plug problems

The weed eater spark plug lasts about 100 hours of use; when this time expires, it starts to spark weakly or won’t spark at all.

  • If the spark plug is not damaged, it can accumulate deposits due to a dirty air filter. Remove the spark plug, inspect it, clean with some fuel and reuse it.
  • To service it, clean the electrodes with an emery board, check the gap with a gaping tool, and adjust it to 0.02 inches.
  • If it has cracked, replace it. In addition, replace the spark plug seasonally to prevent such issues.

Fuel problems

  • First, check the level of fuel in the tank. If it is slow or empty, the weed eater will not start.
  • If there is enough fuel, check if it has separated.
  • Stale fuel left in the weed eater can clog the carburetor and prevent it from starting.
  • Check the fuel tank, and if you notice a sticky residue, then it is likely that the same residue is clogging the fuel lines and carburetor.
  • Therefore, you need to disassemble the entire weed eater and clean it from the fuel tank to the carburetor.
  • If you’re using the weed eater after a long time, drain the old fuel and use a fresh fuel mixture.
  • However, avoid storing the weed eater with fuel in the tank.
  • Also, check the gas cap. If it is not adequately tight, the fuel delivery system won’t work correctly.

Carburetor problems

The carburetor controls the ratio between the fuel and air. If the carburetor is dirty or cracked, your weed eater may not even start. Signs that indicate a faulty carburetor are:

  • Backfiring
  • Overheating
  • Black smoke
  • Bogs down when in full throttle.

The best solution is to clean the carburetor by soaking it in some carburetor cleaner and then using the carburetor rebuild kit to replace worn-out gaskets.

It is also important to note that using quality fuel and cleaning the air filter and fuel filter regularly reduces the clogging of the carburetor.

Flooded engine

If your weed eater keeps bogging down, you’ve probably been restarting the engine several times. As a result, your weed eater now won’t even start because of a flooded engine. Similar to older vehicles, weed eaters are prone to engine flooding.

When you pump the primer bulb, fuel enters the fuel line before pulling the starter rope. Ideally, the correct mixture of air and fuel combine in the combustion chamber to start the motor. However, engaging the choke allows more fuel into the combustion chamber, flooding the engine when starting it, and it is already warm.

The telltale sign of a flooded engine is the smell of gas and no fire from the spark plug. Follow the steps below to unflood your weed eater engine:

  • Wear safety glasses to protect your eyes from the fuel.
  • Press the on/off switch to the “on” position and allow the engine to cool off slightly.
  • Position the choke “off.”
  • Remove the spark plug cap from the spark plug by pulling it out.
  • Use an adjustable wrench to remove the spark plug.
  • While depressing the throttle trigger, pull the starter recoil several times quickly. This may take a lot of pulls.
  • Keep holding the trigger while black smoke leaves the weed eater.
  • Release the trigger.
  • Reinsert the spark plug, then try restating the weed eater.

Never engage the choke when starting a warm engine to avoid flooding the engine.

Echo weed eater string will not advance.

As explained earlier in the articles, Echo weed eaters come in two major types: one that automatically advances the string that cuts weeds and grass, and the other allows the lines to advance when you tap the head on the ground.

Either way, both weed eaters use a nylon cutting line to cut weeds and grass. When the string refuses to advance, the reason could be you’re using the wrong line, the way you loaded the line, or your bumping technique.

Choosing a line

There are a variety of trimmer lines available, and you can utilize any job for enhanced cutting power. However, do not use a string that exceeds the line diameter range for your weed eater’s head. If the line is too big for the head, the line won’t advance.

Using a thinner line than the recommended measurement causes the line to tangle and get stuck. Regardless of the shape of the line you choose, ensure you’re using the correct line diameter for your model.

Loading the string

Check the routing of the string from the spool through the holes in the trimmer heads. Ensure the string winds in the direction of the arrow on the spool. A string will not advance if it winds in the other direction.

  • Ensure the string is concentric and wound tightly around the spool and that there are no overlapping sections.
  • Switch off the weed eater and disconnect the spark plug. Then remove the line from the spool if in kinked or stuck. Next, cut a new line and reinsert it correctly into the weed eater’s head.
  • Also, do not allow too much of the trimmer’s head at one time. Finally, ensure the string is slightly shorter than the protective shield covering the lines as it spins. This prevents the string from tangling and getting stuck.

Weed eater’s operation

Run the weed eater in long, continuous sweeps instead of short on-and-off bursts, which can increase the risk of the rope tangling when the machine starts and stops.

  • If you’re using a bump-feed model, you have to periodically gently tap the head of the trimmer on the ground for the string to advance.
  • Tap the head on soft surfaces such as grass and not hard surfaces like concrete.
  • The head must rotate at full speed when you tap it because the centrifugal force of the spinning is what advances the string.
  • The weed eater string won’t advance if it is too short since not enough centrifugal force acts on it. This can happen if you do not tap the trimmer head often enough.
  • Operating the weed eater needs a string that is 50% or less of the recommended length causes the head to turn too quickly, which can wear out the engine.

Weedeater components malfunction

The following components could be faulty and prevent the weed trimmer string from advancing:

  • Trimmer head: remove the trimmer head and clean it thoroughly. Sometimes twigs and dirt can become logged in the trimmer head and get it stuck. If the trimmer head is worn or broken, replace it.
  • Spring: A broken spring can cause the string to fail to advance. Remove the spring from the head and replace it.
  • Trimmer housing: If the trimmer housing is cracked or bent, it will cause the string to get stuck and prevent it from advancing. If the housing is damaged, replace the entire trimmer head.

Why won’t my Echo weed eater start?

Our easy troubleshooting guideline is for an Echo gas-powered weed eater that won’t start.

Check the fuel

Ensure your fuel tank has fuel. If the fuel is old, drain it, rinse the fuel tank with some fuel, then refill it with properly mixed fuel for a 2-stroke engine.

Do not put away your weed eater in storage with fuel in it as it breaks down in a little as 30 days.

Clean the carburetor

When the fuel breaks down and becomes stale, it becomes gummy and clogs the carburetor and the fuel passages. This will prevent fuel from reaching the combustion chamber for ignition.

Disassemble the carburetor, soak it in carburetor cleaner, and clean all the passages and openings.

Clean or replace the spark plug

If you’re using low-quality fuel, oil deposits and carbon can foul the spark plug and prevent it from firing correctly. If it is damaged, replace the spark plug as they are inexpensive. In case you do not have a new spark plug available, clean the electrode with light-duty sandpaper and adjust the gap.

The coil is probably defective if the spark plug is okay and the weed eater won’t work.

Clean or replace the air filter

A clogged air filter restricts sufficient airflow to the engine for combustion, preventing the weed eater from even starting. Remove the air filter and clean it with soapy water and a nylon brush. Rinse the filter, allow it to dry, and replace it with the weed eater.

If cleaning doesn’t clear all the clogging, replace the air filter.

Clean or replace the spark arrestor screen

Too much oil in the fuel, low-quality oil, and continued low rpm operation causes the spark arrestor screen to plug with carbon deposits. This prevents exhaust gas from flowing out of the engine, leading to power loss, and eventually, the weed eater won’t start.

To fix the issue, remove the screen and spray it with a heavy-duty cleaner to loosen the deposits, then scrub it down with a non-abrasive nylon brush. Next, reinstall the screen and retest the weed eater.

If the screen is too clogged with carbon deposits, replace it.

Why won’t my Echo lithium battery weed eater charge?

Lithium-ion batteries are rechargeable, but they also have a limited number of cycles before degrading. So over time, they stop taking up power and discharge more quickly.


If your weed eater’s battery fails to hold the charge and drains extremely fast, you can try doing a full recharge. First, run the weed eater until the battery drains entirely and has no power even to boot. Then plug it into power and let the battery charge for 48 hours. If the battery doesn’t hold a charge, it is defective and needs a replacement.


The alternator provides voltage to the weed eater while the engine is running and recharges the battery. Use a multimeter to determine if the alternator is defective. If there is no voltage output from the alternator, replace it.


If the battery is not charging, the charger may have an issue. Use a multimeter to test the charger for any voltage output. If there is no voltage output, get a replacement charger.

If the charger is working fine, test the power outlet the charger uses. If there is no power coming through, check the circuit breaker, reset any tripped breakers, or replace any blown fuses.

Voltage regulator

The voltage regulator transmits the proper amount of voltage from the alternator to the battery to keep the battery charged while the engine is running. If the voltage regulator is defective, the battery won’t receive enough voltage, causing it to discharge quickly. The solution is to get a technician to replace the regulator.

Signs that it’s time to replace your battery on an Echo cordless weed eater

Echo cordless weed eater uses power from a lithium-ion battery that requires recharging every so often. Despite their durability, these batteries do not last a lifetime. Over time the battery cannot hold the charge and needs replacing.

If your weed eater starts having issues, you might wonder if the battery has expired. There are five warning signs to look out for that indicate the battery on your weed eater needs replacing; they include:

  • The battery voltage is low and doesn’t fully charge.
  • The battery has reduced capacity.
  • The self-discharge rate is high.
  • The battery overheats frequently.
  • The battery looks swollen.
  • The battery has an unusual smell.
  • The battery is discolored.
  • The battery is leaking the electrolyte.

If you detect any of these signs, we strongly advise you to disconnect the lithium battery immediately and dispose of it correctly, far from other battery and flammable objects.

How long does the battery last on an Echo weed eater?

How long the battery charge lasts usually depends on the nature of the weed eater’s task. The battery lasts about 30 minutes of cuttings time at the highest setting, whereas it has about 50 minutes of cutting time on the lowest setting.

The battery will show you how much charge remains using a series of indicator lights. Press the battery charge status button, and the remaining charge will show. Four red illuminated indicator lights are a full charge. Four continuous red indicator lights will flash when the battery power level is below 10%.

Why does my Echo weed eater die when it gets hot?

Weed trimmers become hot during regular operation. The gas-powered Echo weed eater burns fuel to create power, producing heat. The weed eater then vents the engine head away from the unit and into the outside air.

If the weed eater cannot vent the heat out, it will overheat and affect the weed eater’s performance and damage the engine in the long run.

If your weed trimmer dies when it gets hot, it is a sign that the problem is a blockage in the air passages or the carburetor is running too lean. The best way to stop your weed trimmer from dying is by identifying the cause of the overheating engine. The following checklist will help determine the issue and solve it.

Clogged cooling system

The Echo weed eater has cooling fins within the engine cylinders that help remove hot air from the engine. Unfortunately, the fins can be clogged by vegetation and other debris during operation, preventing the engine from cooling correctly. As a result, the weed trimmer shuts down.

Dismantle the engine and clean the fans with a non-abrasive brush.

The engine has several parts that rub together, generating friction and heat. Without lubrication or with insufficient lubrication, overheating occurs. Therefore, the proper gas-to-oil mixture is required for the engine to have optimum performance.

  • Also, if the fuel mixture has too much gas, the fuel will burn at a higher temperature, and the engine will overheat.
  • Ensure you’re using the correct gas-to-oil ratio of 50:1 or mix 2.6 liquid ounces of oil for every one gallon of ethanol-free gas. Premix the fuel in a separate container and then pour it into the tank so they can blend evenly.
  • If you’re using premium pre-mixed fuel, check for a physical leak in the fuel tank or fuel line, which could be reducing the amount of oil the engine requires for lubrication.

Obstructed air passages.

Your weed trimmer also requires the proper air-to-fuel mixture for the engine to work well. However, if the air passages, the air filter, and the muffler has clogged with dirt and debris, there will be no sufficient air reaching the engine for combustion.

This causes the engine to run ‘rich,’ which means there is not enough oxygen to burn all the fuel. Although the engine runs cool when the air-to-fuel ratio is rich, the blocked air passages reduce air circulation as the engine will overheat.

Take out both the air filter and muffler and clean them with soapy water and a non-abrasive brush. However, if they are too damaged, replace them.

Carburetor problems

The carburetor is in-charge of ensuring the proper amount of air and fuel reaches the combustion chamber.

On the other hand, too much air to fuel causes the engine to run ‘lean’ due to the improper air-to-fuel ratio. As a result, your 2-stroke engine weed trimmer can overheat. There is too much oxygen, and as the fuel burns, excess oxygen remains. As a result, the engine will seize and shut down.

Take the carburetor is not damaged, make sure external air is not coming into the carburetor. If the carburetor is okay, return it into your weed trimmer and adjust the screws to fine-tune the air-to-fuel ratio.

Using battery-powered weed eaters for large workloads

Electrical trimmers are more prone to mechanical issues than gas-powered ones, but they are also less powerful. Therefore the battery-powered weed eaters tend to overheat when trimming thick and overgrown vegetation.

So if you notice your battery-powered weed eater overheating, you’re likely overworking it and change to gas-powered for clearing thick bushes.

The throttle trigger on Echo SRM 210 weed eater will not recoil.

The throttle trigger or pull cord connects to the engine flywheel to start the trimmer. If the throttle trigger doesn’t work or retract, the weed eater won’t start. If the starter doesn’t recoil, the throttle mechanism could be a problem. The issue could be a broken spring or a problem with another part of the weed eater. Whichever way, you need to access the recoil mechanism to identify the issue and fix it.

Throttle trigger problems

The starting mechanism on a gas weed eater consists of a spring-loaded hub that winds around the rope. The hub then connects to the engine flywheel. When you pull the starter rope, the flywheel spins to initiate combustion and get the weed eater going.

Although rare, the rope can cross over, recoil, and get stuck. Also, the recoil spring can break. As a result, the throttle trigger won’t recoil.

To fix this, remove the starter assembly from the weed eater housing and replace the entire recoil mechanism.

Engine seizure

Since the throttle trigger connects to the engine flywheel, difficulty in pulling the rope or failure to retract can be due to an engine problem.

The engine can seize if you forget to refill the weed eater with fuel, and the rope won’t retract.

Try refilling the fuel tank, remove the spark plug, and gently pull the throttle trigger to lubricate the crankshaft. Once you reconnect the spark plug, the throttle trigger should start working.

The engine can also seize up due to restricted airflow. Check the air filter and spark arrestor. If the air filter and spark arrestor are dirty, clean them or replace them.

Why does my Echo weed eater keep spinning?

The Echo weed has a clutch mechanism that stops the working part of the tool from spinning when the engine is idling. If the clutch isn’t working, either the string won’t turn at all, or it won’t stop turning. The engine may be idling too fast, or the clutch may need servicing.

  • Before dismantling your weed eater to service the clutch assembly, check whether the engine is idling too fast for the clutch shoes to retract.
  • Locate the idle adjustment screw and while the engine is running, adjust the screw counterclockwise.
  • The engine should slow down enough for the trimmer head to stop spinning. However, service the clutch if the engine dies before the head stops spinning.
  • The clutch engages the clutch pads to turn the trimmer head.
  • If the clutch assembly is faulty, the clutch will not disengage the clutch pads causing the trimmer head to continue spinning even at low-speed settings. If the clutch is defective, replace it.

Why does my Echo weed eater vibrate so much?

It is typical for the Echo weed eater to vibrate and produce a loud noise due to their small 2-stroke engines; however, the tool should not vibrate excessively. Parts such as the shaft and gearbox should not vibrate too much as they come built with a reduced vibration system. There are several reasons why your weed eater vibrates more than usual.

Loose screws

You weed eater’s shaft secures itself to the powerhead through four screws. With frequent use, the normal vibration of the engine can run the screws loose. Check for loose screws after every use and retighten them. Check the screws connecting the shaft to the head, throttle lever to the shaft, and the shaft to the gearbox.


One of the most common causes for your shaft vibrating is insufficient lubrication. The drive shaft rotates inside a hollow protective tube and needs lubricating grease to keep it spinning smoothly. Inadequate lubrication will cause the shaft to turn roughly inside the tube.

Remove the driveshaft out of the tube, look for blue coloration, and replace it if it’s blue. If it is not blue, apply some lubrication grease.


The gearbox connects the trimmer head to the drive shaft. Sometimes dirt, vegetation, and debris become trapped in the gearbox, forcing the driveshaft to work harder, and as a result, there will be a grinding noise coming from the shaft.

Usually, clearing the dirt should fix the issues, but replace it if the gearbox is damaged.

Clutch and flywheel

Echo weed eaters have a flywheel that powers the ignition system and cools the engine. A defective flywheel will cause the entire engine to vibrate more. Also, if the trimmer head hits a hard object, the flywheel may get bent and spin poorly.

If your weed eater uses a clutch, check the clutch plates, shoes, and springs for signs of wear and damage, then replace them if necessary.

Echo weed eater is not priming

Priming the weed eater is necessary when cold starting your unit. The primer is a small plastic bulb that acts like a vacuum in place of the crankshaft when the weed eater isn’t running.

It pushes air out the fuel lines and sucks gas from the fuel tank and into the carburetor for ignition on a cold engine. When your primer stops working, the engine won’t run.

Follow the steps below for troubleshooting and get your Echo weed eater’s primer bulb working again.

Check the primer bulb.

Fully press and release the primer bulb about ten times and see if the engine starts. It id doesn’t work; the bulb is likely defective.

The primer bulb and line can become clogged or damaged. Inspect the primer bulb for cracks and breaks on the plastic surface, which causes enough air to leak into the system and prevent the primer from holding fuel. If there are signs of physical damage, replace the bulb.

Check the fuel tank and seals.

If the primer bulb is intact, check the visible line to ensure it’s not tangled or clogged. The primer is for cold starting the engine, so if you run out of fuel or use the primer when the engine is warm, the fuel line may be damaged and needs replacing.

  • If the primer bulb is not holding fuel, something is blocking the flow of fuel or air. Dirt in the fuel will settle against the fuel filter and block all in-flowing fuel.
  • Drain all the fuel from the tank and clean the tan out with a clean rag. Next, rinse the tank with a little un-mixed fuel.
  • Finally, refill the fuel tank with fresh fuel, then test the primer.
  • Check the seals around the fuel tank for damage.
  • If they are worn, they could be allowing dirt and debris into the fuel tank and cause clogging.
  • Check the gas vent on the fuel tank and ensure it remains open.
  • The gas vent is a small hole in the gas tank that helps to relieve vacuum and pressure.
  • If the vent is clogged, it can cause a vacuum that prevents the fuel in the tank from flowing correctly.

Check the fuel lines.

The primer bulb is attached to the fuel line system, connecting the carburetor to the fuel tank. The first hose suctions fuel up from the tank. Then the second hose purges excess fuel back into the tank. The primer bulb is on the second hose.

Check this too: STIHL Weed Eater How to and Troubleshooting Guide

Therefore if the fuel lines are blocked, the primer won’t work. Take out the fuel lines and clean them. If it has clogged with old fuel, replace the fuel line entirely.

Check the carburetor

If replacing the primer bulb and fuel line doesn’t fix the priming issue, move into the carburetor.

  • Disassemble and inspect the carburetor’s intake and outtake jets and bores. Often dirt from a broken fuel filter will block the valve and stop the fuel from flowing.
  • Also, a defective inlet valve can get stuck in the closed position, obstructing fuel flow.
  • You can try cleaning the carburetor with carburetor cleaner and if it doesn’t work, take it to a professional for thorough cleaning.


Follow the troubleshooting guidelines in the article for minor quick fixes to the more in-depth issues. However, proper seasonal maintenance and operation is the best way to keep your Echo weed eater working at optimum performance.

Keep in mind that a weed eater is equally a dangerous tool. Always remember to troubleshoot the issues with the weed eater off and the spark plug wire disconnected to prevent it from starting accidentally during repairs.