Look Who it Was Random video

Trimmer Repair - Replacing the Plunger (Spool) Spring (Ryobi Part # 791-181531)

4,442 views · Published 1 September 2015 · 3:12 · Indexed 4 November 2026

Channel: FIX Tech Guides · 2015 · Howto & Style

Watch on YouTube

http://www.ereplacementparts.com/spring-p-283433.html Click here for more information on this part, installation instructions and more.

This particular spring is specific to Ryobi manufactured brands, including Ryobi, Troy-Bilt, Yard Man, Bolens, and MTD. To find a plunger spring specific to your model, visit eReplacementParts.com.

If your Ryobi string trimmer is showing any of these symptoms; replacing the plunger (spool) spring could solve your problem:

1) Bump-feed not working
2) Not enough line feeding from trimmer head
3) Too much line feeding from trimmer head
4) Plunger not working

eReplacementParts.com part number: 791-181531

Tools used for this repair/replacement:

1) Pick or small screwdriver
2) Long-nosed pliers

Get model-specific repair help from eReplacementParts.com. Learn how to troubleshoot, diagnose and repair your power tools and equipment with illustrated instructions, hundreds of step-by-step repair videos, and our DIY forum. If you have a power tool or appliance problem, we can help. https://www.ereplacementparts.com/articles-c-8873.html

[ VIDEO TRANSCRIPT ]

Hi, I’m Mark from eReplacementParts.com. In this video, I’m going to show you how to replace the spool spring on a Ryobi trimmer. The spool spring applies tension to the trimmer head’s feed assembly. Over time, the spring will weaken and will no longer provide the proper tension.

A symptom of this can be a trimmer head that feeds line even when it’s not bumped to the ground. The spool spring is easy to replace, and I’m going to show you how. Spool springs, as well as many parts, can be found on our website. Let’s get started.

I’ll begin by removing the bump head knob and the spool. I’ll use a small pick to pull the C-clip away from the shaft. Now remove the plunger and the plunger spring. Now install the plunger spring and the plunger. You’ll notice there are some angled faces on the plunger. There are also angled faces on the slider, and I want to align those two together.

Once in place, I’ll press the plunger in and secure it with the C-clip. Now I’ll install the spool. The spool comes pre-packaged with trimmer line already on it, and often the two lines are twisted together, and this is just for shipping. So, what I want to do, is pull the lines away from each other, so I have them extending out both sides of the trimmer head.

You’ll notice there are these clips on either side of the head, and those are to temporarily hold the line while we insert the spool into the trimmer head.

So, I’ll line up each of the trimmer lines with the eyelets on the trimmer head, and then slide the head over the shaft. Once in place, I’ll give a tug on the lines, and that’s to pull them away from those temporary clips. And now, secure the spool with the bump head knob. Because of the spring on the knob, you’ll need to press in as you secure it.

And that’s all it takes to replace the spool spring on your Ryobi trimmer. If you found this video helpful, be sure to give us a thumps-up, and leave a comment.

[ END TRANSCRIPT ]

More from this channel