Easy
Less than 15 minutes
This is a genuine Homelite replacement part designed for use with string trimmers. It is supplied directly from original equipment manufacturer. It is the lower shaft that the gearbox is attached to. This item is made out of metal and it is sold individually.
To replace this lower boom assembly you would need a screwdriver.
• Remove the screw that connects upper and lower shafts
• Push in the button located on the attachment shaft and remove the old boom assembly
• Remove the anti-rotation screw from the gearbox and separate it from the shaft
• Secure the new shaft with the gearbox using the same anti-rotation screw
• Secure the boom assembly with the coupler and upper shaft
Lower Boom Assembly 311100001
OEM part for: Homelite, Ryobi
Part Number: 311100001
$18.89
In Stock
Order within the next 14 hours and your part ships today! 
Product Description ?
- Classification: Part
- Weight: 1.35 lbs.
- Shipping: Ships Worldwide
Compatibility
This Lower Boom Assembly will fit the following 8 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Displaying 8 of 8 matching models.
Homelite
Ryobi
8 total model matches. Try the above search to narrow your results.
This is the official OEM part for the following brands:
- Homelite
- Ryobi
This item works with the following types of products:
- Trimmer
Repair Videos ?
Watch the Repair Video for
Lower Boom Assembly
Customer Part Reviews ?
Average Rating (out of 5):
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- 1
Easy to install 5 min and a hex wrench working like new.
arrived sooner than I thought in great condition.
Guest -
August 20, 2020
Verified Purchase
Great part
Excelent part.
Guest -
August 5, 2020
Verified Purchase
Easy Fix
This part was easy to find on the website and arrived in no time at all. It installed easily and I am back in action again with the weed trimmer.
Guest -
June 26, 2019
Verified Purchase
Replacement part was close but no cigar
The replacement part was not exactly like the part I was replacing. (and yes I rechecked the model number) It fit, but the mount point was different than the original. I had to modify the mount point. After that all worked.
Paul -
April 11, 2023
Verified Purchase
Questions & Answers ?
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Does this fit my product?Questions & Answers for Lower Boom Assembly
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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.
Bearing in lower unit burnt up
Gene - June 8, 2017
👍 3 of 3 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Allen wrench
Slid lower boom on tightened up good to go
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Lower boom bearing seazed up
Roger - September 22, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Removed lower boom assembly
Attached new boom, ensuring internal cable inserted in upper cable
Done!
Attached new boom, ensuring internal cable inserted in upper cable
Done!
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Shaft on lower boom assembly snapped
Mike - August 21, 2021
Tool Type
Trimmer
Difficulty
Medium
Time
15-30 minutes
Tools Used
Pliers, Wrench Set
Parts Used
Simple replacement….unbolt old assembly… bolt replacement on.
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Nut on original was rounded off from string spool slipping
Ron - August 31, 2018
Tool Type
Trimmer
Difficulty
Medium
Time
15-30 minutes
Tools Used
Wrench Set
Parts Used
The lower boom goes on simply, but for some reason shaft was not fitting in all the way, it took me three times to get it right but then it worked great, Thank You, Ron..........
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The end of the shaft inside that attaches to the trimmer head had snapped off rendering it useless.
David - June 8, 2018
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Allen wrench
Parts Used
The lower boom assembly is attached with 2 screws using an allen wrench the broken assembly was removed and the new lower boom assembly was attached and screwed in. This was a very simple repair. This trimmer has seen alot of use but still works great.
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The bearing seized.
Ana - February 22, 2018
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Allen wrench
Parts Used
I just unscrewed the lower boom and replaced it with the new one. Extremely easy.
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Lower boom was stripped.
Christopher - May 23, 2017
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Attach the lower boom.
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Lower boom need replace
robert - October 9, 2016
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Remove the old one and replace it with the new one.
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Metal shaft came loose on end of curved shaft weed eater
Mitch - August 8, 2016
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set, Alan Wrenches
Parts Used
Took 2 Allen headed screws out of the middle of the shaft where the curved part attached removed old shaft reinserted new curved shaft and replaced bolts and attached cutter head, Was simple and quick. Appreciated the fast service in getting the parts.
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Lower boom arm broke.
Daniel - May 5, 2016
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Unscrewed the old one, then screw the new one on and tada finished to easy. Thanks for the easy repair.
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Learn MoreOur 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.
