Trimmer Repair - Replacing the Adjustment Knob (Ryobi Part # 791-181981)

3,324 views · Published 25 August 2015 · 2:01 · Indexed 8 November 2026

Channel: FIX Tech Guides · 2015 · Howto & Style

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http://www.ereplacementparts.com/adjustment-knob-p-1748645.html Click here for more information on this part, installation instructions and more.

This particular adjustment knob is specific to Ryobi manufactured brands, including Ryobi, Troy-Bilt, Yard Man, and Bolens. To find an adjustment knob specific to your model, visit eReplacementParts.com.

If your string trimmer is showing any of these symptoms; replacing adjustment knob could solve your problem:

1) Attachments loose
2) Threads stripped
3) Clamp won’t tighten

eReplacementParts.com part number: 791-181981

Tools used for this repair/replacement:

1) Wrench, pliers, or ratchet/socket set

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

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