How to Replace the Trigger Return Spring 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 trigger allows you to open and close the throttle on your trimmer. The trigger return spring provides necessary tension for this trigger to operate smoothly. Over time, the trigger return spring can break, resulting in a trigger (and throttle) that requires manual manipulation to open or close.

This article provides step-by-step instructions for removing and installing the trigger return spring on an Echo SRM-225 trimmer.

Let's get started.

  REMOVING THE TRIGGER RETURN SPRING [top] 1. Remove the control handle assembly.

Remove the (4) screws from the cover of the control handle assembly.

Remove the cover from the control handle assembly.

Remove the (2) screws from the clamps inside the control handle.

Remove the control handle assembly.

  2. Remove the trigger return spring.

Lift the trigger lockout/throttle cable assembly away from the control handle.

Lift the throttle trigger assembly away from the control handle. It may be helpful to immobilize the trigger return spring with long-nosed pliers while removing the trigger.

Use long-nosed pliers to remove the trigger return spring from the throttle trigger.

  INSTALLING THE NEW TRIGGER RETURN SPRING [top] 3. Install the trigger return spring.

Slide the new trigger return spring over the shaft of the throttle trigger.

Use long-nosed pliers to lock the return spring into position. The upper arm should be seated against the upper portion of the shaft recess; the lower arm should be seated within the notch on the throttle lever.

Install the throttle trigger (and spring) into the control handle; the shaft of the throttle trigger should align with the hole in the control handle.

Use long-nosed pliers to bend and lock the return spring into position behind the plastic tab in the control handle.

  REASSEMBLING THE UNIT [top] 4. Reinstall the control handle assembly.

Reinstall the trigger lockout/throttle cable assembly into the control handle.

Use a screwdriver to tuck the ignition wires into the channels along the inside of the control handle.

Align the throttle cable with the grooves along the control handle (above the ignition wires).

Position the control handle assembly on the main pipe.

Align the metal ring clamps with the slots in the control handle assembly.

Install (but do not fully tighten) the (2) screws into the ring clamps.

Rotate the control handle assembly into alignment with the engine and the front handle.

Fully tighten the screws in the ring clamps to secure the control handle assembly.

  5. Reinstall the control handle cover.

Install the cover onto the control handle assembly.

Secure the cover with the (4) screws.

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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