This is an Echo carburetor cleaning guide. This article is going to demonstrate with pictures, on how to remove the carburetor, clean the carburetor and reinstall the carburetor to an Echo SRM-225 string trimmer. 

​The reason we clean the carburetor is to maintain a healthy fuel flow to the engine. If this fuel flow gets disrupted, or if the fuel flow becomes blocked, there's a good chance your weed eater won't start.

When starting a weed eater, or any 2 cycle engine, here are two major things to consider.

• ​Number 1 is, consider the fuel. If your weed eater doesn't start anymore, take a look at the carburetor. The carburetor is where the fuel flows through. If the carburetor appears dirty, clean it. If the carburetor seems to be cracked or damaged, replace it. ​

​And 2,

• Make sure the engine is getting spark. If your weed eater didn't start after cleaning the carburetor, go ahead and check the spark plug, see if that needs to be brushed clean, or replaced. Once replaced and still nothing started, the next step is to replace the ignition coil.

But listen to this.. 100% of the time, if you clean the carburetor, and make sure the carburetor has it's gaskets on the right way, and see that it doesn't have leaks when you press the prime bulb, then there's a good chance your weed eater will start.

If we forget to provide maintenance, (especially to the carburetor) after a while, your weed eater won't start.
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​This guide was made to help YOU clean your Echo SRM-225 carburetor easy.
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Below contains the first image demonstrating step by step on how to disassemble, clean and reassemble the carburetor to your Echo SRM-225 weed eater.

Now lets begin. Pay attention closely..

Around the top, there will be a spark plug wire visible for you to see, (its black and sometimes has a small tag on it), pull the (black) spark plug wire [off the spark plug].

​We do this so the engine won't accidently turn on as you're working on the unit.

Finger pointing to spark plug wire. Remove this black wire from the spark plug.

NOTE: (When working on your tool, this should always be the first step you do before removing parts from the engine).

Removing the spark-plug-wire will ensure the engine won't turn on as you're working on it with your hands.
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​Next, remove the (black) air filter cover. Just simply unscrew it from the orange cap with your fingers to remove this part. 

A picture loosening the air filter cover on an Echo SRM 225 weed eater.

Now that the cover is off, you're going to want to remove the air-filter to have access to the air-filter assembly. 

​To remove the air-filter, just use your finger tips to simply pull it off, like in the image below.

Carefully pulling off the air-filter with finger tips.

Here's a good tip to follow next: when removing multiple parts, like the cover, then the muffler, for example.. the cover will have screws, and the muffler will have screws. If the cover is the first thing you took off, put (the cover and screws) on your desk, then put (the muffler and screws) next-to-it, in-line so you remember which part came after what. Then, when you go re-installing everything back together, you can just follow everything backwards to complete the removing, cleaning and replacing of all the parts on your tool.

Here's a better example of how you should keep your parts sitting after you've taken them.

When removing parts, make a line to have an organized work station. Because when it comes back down to reinstalling everything together, you'll see how easy it will be for you.

​Lets get back to disassembling some more parts so we can have access to the carburetor...

This is the step where we remove the air-filter assembly. 

Note - (When removing the air-filter assembly.. you will now have access to the carburetor. The carburetor is sitting right behind it.)

​The tool to remove the air-filter assembly requires a T-25 screwdriver. Here is a picture of the tool below.

Picture of the T-25 Screwdriver. Used for removing and re-installing the air-filter assembly.

​There's only 2 bolts holding down the air-filter assembly, so this should be easy. Loosen them and continue on to next step.

​Here's an image below.

These are the 2 bolts you need to loosen and remove to gain access to the carburetor.

Once you've loosened the two screws and removed the assembly, remember to put the assembly and the screws you loosened, next to the air-filter so everything stays as organized as possible and you remember what came off. Lay your parts like this....

Your parts should be in order like this. This makes the work space organized and easier for you to remember what was taken off.

Once the air-filter assembly has been taken off, the carburetor should fall off right behind it. 

​If the carburetor doesn't fall off after removing the air-filter assembly, that's ok, it just might be sticking to the back wall.

If its sticking to the back wall, just pull it off slightly with your fingers. 

You should have the carburetor in your hands like this now to proceed to the next step.

The next thing to do now is remove the two hoses connecting to the carburetor. 

Remove the yellow and black hoses pictured below.

*Make sure to use a rag to collect any fuel that drops.

Note: (When removing hoses, make sure to remember each hose you take off, and remember where you took it from)

Remembering hose placement is important because this is where the fuel flows. If these parts get messed up, a whole bunch of things can go wrong. If you ever need assistance in remembering how your hoses looked on the Echo SRM-225 carburetor, revert back to this image.

The next thing to do is remove the "silver braided wire line" in the next image.

To do that, you need to align the tiny gold cylinder with the line, then pull back the throttle and the line should push out from the gold cylinder. Here's an image to follow below..

After looking at picture, continue reading below.

Once the gold cylinder is aligned, the head of the line should pop out from its place like this..

The head of the line is free from the gold cylinder. This is what you want to accomplish to move onto the next step.

Next we're going to loosen the nut in the image below so we can take the whole line off.

The tool you need is a 10mm wrench shown below..

10mm wrench

Just loosen it with the wrench like this...

Take your 10mm wrench and place it on the nut, then loosen the nut.

Once the nut is loose, just lift the line like this in the following image...

Lift the line up and away from the carburetor.

Congratulations, you have just removed the carburetor. Now you can hold it in your hand like in the image below.

This is a picture of the carburetor finally disconnected from the weed eater.

The next thing to do is to remove the yellow prime bulb so we can start cleaning the carburetor.

​ All you need to do is loosen 4 screws with a small Philips screwdriver.

Once loosened, pull off the silver bracket and set it aside like in the images below..

Image 1 - pull off bracket.

Image 2 - set bracket aside.

Now, grab the carburetor and loosen a small screw shown in image 2.

Image 1 - grab carburetor.

Image 2 - loosen screw.

After the screw is off, lift the part off the carburetor and set it aside just like in images 1-4.

Image 1 - grab part with your finger tips.

Image 2 - lift part off the carburetor.

Image 3 - bring part to a safe area.

Image 4 - set part down and continue on to the next step.

Now that you have the carburetor in your left hand, and the other part laying on the right, like in the image below, what you're going to do here is remove both of the black gaskets off these items so you clean the carburetor.

In the next image, we have the carburetor on the left side of the screen and another part laying on the cloth just to right of it. Both of them have black gaskets on them, remove these two gaskets.

Remove the black gasket from the left item, and then remove the black gasket from the right item. *Also a guide to see how the gaskets were placed on the carburetor. Remember that the thinner plastic gasket was on the silver carburetor and the thicker rubber gasket was on the part laying on the cloth displayed in the image above.

When taking the gaskets off, remove them carefully like so..

Image 1 - removing the black gasket from part laying on cloth.

Image 2 - then setting it aside to put the thinner plastic gasket on top of this one.

SPECIAL NOTE: Make sure the thinner plastic gasket is on top of the thicker rubber gasket. 

- The thicker rubber gasket was on the cream colored item.
- And the thinner plastic gasket was on the silver colored item.

To see a picture of how the gaskets were placed on the carburetor, count back 3 pictures above to see how the gaskets were placed on the carburetor. Continue reading below..

Now we're ready to spray this part clean.

​Grab the cream colored item (known as the fuel chamber) and spray carburetor cleaner inside the two golden ports in image 1. 

Then spray carburetor cleaner inside the two ports sticking out in image 2.

Image 1 - spray the entire surface, including where the arrows are pointing to.

Image 2 - spray in these two ports.

Now, pick up the silver carburetor.. and spray carburetor cleaner in every little whole you see in the picture below. And also spray where the arrows are pointing to in the picture below..

Spray every whole or port you see in the image, and spray where the 2 arrows are pointing to, to clean the carburetor.

Once you sprayed it cleaned, put back the gaskets over the carbretor.

The thinner plastic gasket goes on the silver part on the left, and the thicker rubber gasket goes on the cream colored part laying on the cloth in the image below.

The gasket must be placed exactly like this in order for the weed eater to prime the fuel correctly. Make sure the gaskets are on just like this.

After placing the gaskets back on, connect the two parts together and tighten it down from the silver screw in the middle shown in image 1. Then replace the silver bracket with the prime bulb back over the part like in image 2 and tighten it down.
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Image 1 - tighten it down from the silver screw in the center.

Image 2 - then replace the silver bracket & prime bulb back over it and screw it down with the 4 screws around it.

Great job!

You cleaned one side of the carburetor!

Now we're going to clean the bottom end of the carburetor. Continue below to keep reading..

To clean this part of the carburetor, just unscrew the 2 screws shown in the picture, with a Philips screwdriver.

Once the 2 screws are off, lift the metal plate off the carburetor, then take off the black gasket like in the images below..

Image 1 - removing metal plate.

Image 2 - seting metal plate aside.

Image 3 - carefully take off black gasket.

Image 4 - then place the metal plate over the black gasket to remember how it was placed.

Image 5 - then spray this whole area clean with carburetor cleaner.

After spraying it clean, place the black gasket back over the area like in the image below.

An image of me laying the gasket on top.

Then put the metal plate back over it and tighten it down with the 2 screws. Like in the next image.

The end result should look like this.

Congratulations, we just finished cleaning the carburetor. Now we're going to reassemble everything back together.

It wasn't that hard right?

​Good, just keep following these directions and you'll be on your way to starting your weed eater in no time. The next step now in reassembling your weed eater is to re-connect the hoses back onto the carburetor like in the images below..

Image 1 - align the carburetor with the hoses.

Image 2 - connect yellow hose to left side, and right hose to right side.

Now you can grab the air-filter assembly and replace it back onto the carburetor to tighten it down.

Once you've tighten down the black assembly, grab the air-filter and replace it over the assembly. Your finished product should look like this..

Finished result - air filter is back on.

Then grab the black air-filter cover and replace it over the assembly and tighten it down with your fingers like in image 1 showing below.

Image 1 - tightening down air-filter cover with finger tips.

And that is how you disassemble, clean and reassemble the carburetor to an Echo SRM 225 weed eater. I hope this guide has helped you in getting your weed eater to start again. Always make sure to provide good maintenance to your lawn care equipment so these tools can last a life time.

If you need to clean your carburetor again, this guide will always be here for you to follow incase you get in trouble doing it by yourself. Just follow my simple steps on doing an echo carburetor clean right from home. See you guys later..