How to Replace the Spark Plug on a Ryobi Trimmer

Finish Nailer Repair - Replacing the Driver Guide (Ridgid Part # 79004001022)

Replacing the spark plug on a Ryobi trimmer

The Facts

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.

Replacing the spark plug should be part of the normal yearly maintenance on your string trimmer. The spark plug creates the spark inside the trimmer's engine, allowing combustion to occur. Symptoms of a bad spark plug include difficulty starting, misfiring or the inability to start the engine at all.

This article provides step-by-step instructions for removing and installing the spark plug on a Ryobi string trimmer.

Let's get started.

The Fix

REMOVING THE SPARK PLUG [top]

1. Remove the spark plug.

Remove the spark plug boot from the spark plug.

Remove the boot

 

 

Use a spark plug wrench (or socket) to loosen the spark plug.

Loosen the spark plug

 

 

Remove the spark plug from the cylinder head.

Remove the spark plug

 

 

 

ADJUSTING THE GAP [top]

2. Set the gap on the new spark plug.

The “gap” is the distance between the ground electrode (metal strap) and the center electrode. This distance is measured (and adjusted) with a spark plug gapping tool. Adjustments are made by moving the strap closer to (or farther from) the center electrode.

Setting the gap

 

 

Measure and adjust the gap (as necessary) to twenty-six thousandths of an inch. (0.026).

Gap the new plug

 

 

 

INSTALLING THE NEW SPARK PLUG [top]

3. Install the new spark plug.

Thread the new spark plug into the cylinder head.

Install the new plug

 

 

Secure the spark plug with a wrench.

Secure the spark plug

 

 

Replace the spark plug boot.

Replace the boot

The Finish

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.

Find your next fix here.

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