How to Replace the Spark Arrestor Screen on an Echo Trimmer (Model SRM-225)

String trimmer out of whack? It's time to face the fix. Whether you are a legendary landscaper or a weekend weed whacker, eReplacementParts.com provides the parts, procedures and facts you need to fearlessly fix what fails you.

The spark arrestor screen is part of the trimmer's muffler. Its purpose (as the name suggests) is to stop sparks from exiting the muffler (which can cause wildfires). Over time, the spark arrestor screen can become plugged with carbon or unburned oil. When this happens, the trimmer will display a noticeable lack of power (and in many cases, it will not accelerate to full throttle).

Replacing the spark arrestor screen is easy to do. It is also required by law in many areas (to install a spark arrestor on all gas-powered equipment).

This article provides step-by-step instructions for removing and installing the spark arrestor screen on an Echo SRM-225 trimmer. Let's get started.

  REMOVING THE SCREEN [top] 1. Remove the engine cover.

Remove the (2) retaining screws from the engine cover.

Disconnect the spark plug boot from the spark plug.

Lift and remove the engine cover from the engine.

  2. Remove the spark arrestor screen from the muffler.

Remove the (5) screws from exhaust guide.

Remove the exhaust guide from the muffler.

Remove the exhaust gasket assembly.

Remove the spark arrestor screen from the muffler.

  INSTALLING THE NEW SCREEN [top] 3. Install the spark arrestor screen.

Position the new spark arrestor screen over the opening in the muffler.

Install the exhaust gasket over the new screen. This may include a two-piece assembly. If so, install the large gasket first.

Install the smaller gasket second.

Install the exhaust deflector.

Secure the exhaust deflector with the (5) screws.

  REASSEMBLING THE UNIT [top] 4. Reinstall the engine cover.

Install the engine cover, ensuring that the spark plug wire passes through the hole in the top.

Secure the engine cover with the (2) screws.

Reconnect the spark plug boot to the spark plug.

You don't have to leverage your savings to level your lawns. As you just learned, repairing your own equipment is easy when you follow our step-by-step guides. Not only did you restore trimmer functionality at a fraction of the cost of replacement; you have taken the edge off of future repairs, wherever you may find them.

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