Easy
Less than 15 minutes
The metal spring goes between the e-clip and the plunger and helps to maintain tension. It is a genuine item that is supplied by the original equipment manufacturer for use with trimmers. This is a small part that will need to be replaced if it becomes lost or stretched and may require a screwdriver to install the spring. This is available as an individual replacement part.
Spring 791-181531
OEM part for: Ryobi
Part Number: 791-181531
$4.99
In Stock
Ships within 1 business day 
Compatibility
This Spring will fit the following 187 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
This item works with the following types of products:
- Trimmer Parts
This part replaces obsolete part #: 181531
Repair Videos ?
Watch the Repair Video for
Spring
Articles:
|
Plunger Spring Sprung? Simple steps show you how to remove and install the plunger spring on a Ryobi trimmer....
September 02, 2015
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Questions & Answers ?
Our customer Service team is at the ready daily to answer your part and product questions.
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Customer Repair Instructions ?
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part.
String would come out constantly
Chris - May 26, 2016
👍 2 of 3 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
ereplacementparts has a excellent video on how to do this repair. It was a great help. Here is the link to the video for anybody doing this repair.
https://www.youtube.com/watch?v=ZOsyqwNhUZc
https://www.youtube.com/watch?v=ZOsyqwNhUZc
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Bump feed on string head
Mike - July 9, 2023
Tool Type
Trimmer
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Dry lube
Remove bump knob, removed string spool, remove E clip on shaft, remove plunger & spring.
Then remove C clip, pull out slider & 2 slider springs below it. Thoroughly clean the body of the trimmer head.
after thoroughly cleaning, spray a little dry lube on the spring & slider grooves inside the head, Install slider springs, install slider (Making sure the spring tabs on slider are over the top of the slider springs), while holding slider & springs in, attach the C clip to shaft that holds the slider in place, but lets it freely slide. Then install plunger spring & plunger. Hold plunger down while attaching the E clip onto the shaft. push plunger & watch slider move to one side, then back when plunger comes back up. Basically, verify operation. If all is good, Install spool & bump knob. Then install trimmer line as normal... Enjoy your newly repaired bump feed head that only takes a slight "bump" to feed more line! :)
Then remove C clip, pull out slider & 2 slider springs below it. Thoroughly clean the body of the trimmer head.
after thoroughly cleaning, spray a little dry lube on the spring & slider grooves inside the head, Install slider springs, install slider (Making sure the spring tabs on slider are over the top of the slider springs), while holding slider & springs in, attach the C clip to shaft that holds the slider in place, but lets it freely slide. Then install plunger spring & plunger. Hold plunger down while attaching the E clip onto the shaft. push plunger & watch slider move to one side, then back when plunger comes back up. Basically, verify operation. If all is good, Install spool & bump knob. Then install trimmer line as normal... Enjoy your newly repaired bump feed head that only takes a slight "bump" to feed more line! :)
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String feed
James - July 9, 2023
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Snap ring pliers
Using a parts drawing, new parts were installed .
Very easy.
Very easy.
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Trimmer line flying out of outer spool.
Jose - July 12, 2021
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers, e-Clip pliers
Remove bump feed knob.
Remove reel and line assembly.
Remove c-clip.
Remove spring.
Remove e-clip.
Remove slider.
Remove small speed spool springs.
Reinstalled with some new parts and all is well.
Remove reel and line assembly.
Remove c-clip.
Remove spring.
Remove e-clip.
Remove slider.
Remove small speed spool springs.
Reinstalled with some new parts and all is well.
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OEM stands for Original Equipment Manufacturer and means the part you’re buying is sourced directly from the manufacturer who made your product. At eReplacementParts, we sell only genuine OEM parts, guaranteeing the part you’re purchasing is of better design and of higher quality than aftermarket parts.
Our product descriptions are a combination of data sourced directly from the manufacturers who made your product as well as content researched and curated by our content & customer service teams. This content is edited and reviewed internally before being made public to customers.
Our customer service team are at the ready daily to answer your part and product questions. We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
All our part reviews are solicited directly from other customers who have purchased this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
All our customer repair instructions are solicited directly from other customers just like you who have purchased and replaced this exact part. While we moderate these reviews for profanity, offensive language or personally identifiable information, these reviews are posted exactly as submitted and no alterations are made by our team.
Based on data from past customer purchasing behaviors, these parts are most commonly purchased together along with the part you are viewing. These parts may be necessary or helpful to replace to complete your current repair.
All our installation videos are created and produced in collaboration with our in-house repair technician, Mark Sodja, who has helped millions of eReplacementParts customers over the last 13 years repair their products. Mark has years of experience in selling and repairing both commercial and residential products with a specialty in gas-powered equipment.
This data is collected from customers who submitted a repair instruction after replacing this exact part. Customers can rate how easy the repair was to complete and how long it took. We aggregate this data to provide a repair rating that allows customers to quickly determine the difficulty and time needed to perform their own repair.
