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Introduction

Use this guide to replace the stop switch (or "kill" switch) on your Husqvarna 223L String Trimmer.

The stop switch on a string trimmer is a critical safety mechanism that immediately turns off the string trimmer when pushed. A malfunctioning stop switch is a danger to both the person using the string trimmer and anyone in their vicinity.

Double-check that your string trimmer is the 223L model. Each Husqvarna string trimmer has unique specifications, so this guide may not work for other models.

Before you begin this guide, turn the engine off and allow it to cool completely. Make sure the stop switch is set to the OFF position. Drain the fuel tank or run the engine until it is out of fuel to reduce the risk of spills or fire. Perform the repair in a well-ventilated area, away from open flames or sparks.

What you need

Step 1 Stop Switch

Husqvarna 223L Stop Switch Replacement, Stop Switch: step 1, image 1 of 2

Husqvarna 223L Stop Switch Replacement, Stop Switch: step 1, image 2 of 2

Disconnect the spark plug.
Make sure to twist the cap and rest it on the side of the spark plug (as seen in the second image) to avoid potentially starting the string trimmer while you complete the replacement.

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Step 2

Husqvarna 223L Stop Switch Replacement: step 2, image 3 of 3

Using your 4 mm Allen wrench, remove the five 4x18 mm hex cap screws, one 5x14 mm button head hex cap screw, and the 8x16 mm O-Ring under the button head screw from the plastic housing.
Remove the plastic housing.

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Step 3

Remove the wire from the wire guide on the interior of the plastic housing.

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Step 4

Using a spudger, pry the failed stop switch out of the plastic housing.
The switch is tightly secured, so you will likely need something small to help you pry it out.

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Step 5

Husqvarna 223L Stop Switch Replacement: step 5, image 3 of 3

Pull the electrical wires off of both sides of the stop switch.
Pay attention to which wire connects to which side of the switch, as you will connect the wires to your new switch in the next step.

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Step 6

Connect the electrical wires to each side of the replacement stop switch.

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Step 7

Reinsert the stop switch into the plastic housing until it clicks into place.

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Step 8

Replace the wire into the wire guide on the interior of the plastic housing.

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Step 9

Replace the plastic housing onto the string trimmer.
Using your 4 mm Allen wrench, replace the five 4x18 mm hex cap screws, one 5x14 mm button head hex cap screw, and the 8x16 mm O-Ring under the button head screw in the plastic housing.

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