How to Replace the Throttle Trigger Spring on a Ryobi Trimmer

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 throttle trigger spring applies pressure to the throttle trigger, which pulls the trigger (and the throttle cable) to the idle position. Over time, the throttle spring can wear out or break, resulting in a trigger (and throttle) that requires manual manipulation to open and close.

This article provides step-by-step instructions for removing and installing the throttle trigger spring on a Ryobi string trimmer.

Let's get started.

  REMOVING THE TRIGGER SPRING [top] 1. Disconnect the accessory.

Loosen the adjustment knob.

Depress the locking tabs on the accessory.

Slide the accessory out of the upper housing.

  2. Separate the two halves of the throttle housing.

Remove the (5) retaining screws from the throttle housing.

Remove the (1) anti-rotation screw from the throttle housing.

Separate the two halves of the throttle housing.

  3. Remove the throttle trigger.

Lift the throttle trigger assembly away from the lower housing.

Remove the trigger spring from the trigger assembly.

Disconnect the throttle cable from the throttle trigger.

  INSTALLING THE NEW TRIGGER SPRING [top] 4. Install the throttle trigger.

Connect the throttle linkage to the throttle trigger. Proper orientation is important: The throttle linkage should sit on top of the trigger assembly when the two components are placed into the handle.

Install the new trigger spring onto the throttle trigger. The hooked portion of the spring should wrap around the trigger (from the bottom); the coils of the spring should align with the trigger mounting hole.

Partially install the trigger and spring assembly onto the mounting post in the lower housing.

Use a screwdriver to pull the trigger spring into position behind the plastic tab in the throttle housing.

Press the trigger assembly fully into position within the housing.

  REASSEMBLING THE UNIT [top] 5. Reinstall the top half of the throttle housing.

Verify that the throttle trigger, spring and cable are neatly aligned within the housing.

Install the top half of the throttle housing.

Secure the top half of the throttle housing with the (5) screws.

  6. Reinstall the anti-rotation screw.

Install the anti-rotation screw. Note that there are two different mounting holes on the metal drive shaft housing. The anti-rotation screw should be installed into the hole that is closest to the trimmer's engine.

Secure the anti-rotation screw.

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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