Easy
Less than 15 minutes
This line trimmer bump feed knob is an authentic OEM part from Craftsman for trimmers and weedwackers. This part lets go of the cutting line when you bump the line trimmer bump feed knob on the ground while the spool is spinning. There are no tools you need to replace this part. This line trimmer bump feed knob is made of plastic and is sold individually.
Bump Knob 791-153066B
OEM part for: MTD, Ryobi, Troy-Bilt, Yard Man, Bolens, Yard Machines, Craftsman, Cub Cadet
Part Number: 791-153066B
$13.42
In Stock
Ships within 1 business day 
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Product Description ?
- Classification: Part
- Weight: 0.05 lbs.
- Also Known As: Bump Cap, Bump Cover, Spool Cover, Bump Knob
- Shipping: Ships Worldwide
Frequently Purchased Together ?
Compatibility
This Bump Knob will fit the following 446 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Ryobi
Troy-Bilt
Yard Man
Bolens
MTD
Yard Machines
Craftsman
Cub Cadet
Show More Compatible ModelsThis item works with the following types of products:
- Trimmer Parts
- Blower Parts
This part replaces obsolete part #: 791-153066
Repair Videos ?
Watch the Repair Video for
Bump Knob
Articles:
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Step-by-step instructions for removing and installing the bump knob on your Bolens string trimmer....
June 25, 2018
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Customer Part Reviews ?
Average Rating (out of 5):
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5 stars
52
4 stars
6
3 stars
1
2 stars
1
1 stars
1
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Easy repair
Just what I needed, my weedeater is working great
steve -
October 16, 2023
Verified Purchase
Correct part
Exactly what I ordered and delivered as promised. Unfortunately, postal worker delivered to wrong address
Robert -
September 9, 2023
Verified Purchase
Fastest Shipping Ever
The part is brand new, packed well, and really had the fastest shipping EVER!! Thanks for that!.
Guest -
July 29, 2023
Verified Purchase
Easy Parts Replacement
As always you had the part..Super fast shipping and then sent video follow up on installation..Thanks
Guest -
July 26, 2023
Verified Purchase
Couldn't find...
Looked all over for part, couldn't find it was about buy new weed wacker. Then i found eReplacementParts they had exactly what i needed .
Guest -
July 18, 2023
Verified Purchase
Worked as expected
Good condition nice fit your company is nice to work with
Guest -
July 13, 2023
Verified Purchase
Good part
The part is easy to remplace.
iGlobal -
June 27, 2023
Verified Purchase
If you need parts you can"t find elsewhere:
only place I can find replacement parts for my equipment, great
Antonio -
June 6, 2023
Verified Purchase
Perfect fit
This arrived quickly and was a perfect replacement for the factory knob that I lost.
Philip -
May 30, 2023
Verified Purchase
the parts I ordered have resolved my trimmer issues
quality parts & arrived quickly.
Guest -
May 18, 2023
Verified Purchase
Questions & Answers ?
Our customer Service team is at the ready daily to answer your part and product questions.
Ask our Team
We have a dedicated staff with decades of collective experience in helping customers just like you purchase parts to repair their products.
Does this fit my product?Questions & Answers for Bump Knob
I need a bump feed knob for my trimmer. I ordered one from another company and received an Oregon brand part # 55-803 and it didn't fit. The bolt on my knob is 3/8" across, including the threads. The threaded part of the shaft is 1/2" with left hand threads. The head of the bolt is square. The plastic knob is around 2" across with 4 spots that are slightly raised. Is this the correct part for my Troy-Bilt string trimmer? Thanks
David
for model number TB80 EC
asked on 2022-08-29
Hello David, Thank you for your inquiry. We have researched the model number that you have provided and confirm that this part will fit your model. We hope this helps and if you need help placing an order for a part, customer service is open 7 days a week. Please feel free to give us a call. We look forward to hearing from you!
eReplacementParts Team August 29, 2022
Will this bump knob and outer trim head fit the TB22-EC trimmer?
Dale
for model number TB22-EC
asked on 2022-06-29
Hi Dale,
Thank you for your question. Yes, this would be the correct part for your trimmer. If you need help placing an order for it, customer service is open 7 days a week and anyone will be happy to assist you. Please feel free to give us a call. We look forward to hearing from you!
eReplacementParts Team June 29, 2022
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.
Lost the bump head knob
Patricia - November 17, 2015
👍 26 of 34 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Parts Used
Got the replacement and screwed it on. Perfect fit.
Did you find this story helpful?
Thanks for voting and helping fellow customers!
The Bump Head Knob Assembly would not come off so I had to hack saw it off.
Carl - January 17, 2017
👍 9 of 11 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, My fingers
Parts Used
I had to order the spool assembly and the bump head know assembly. Since I had to cut the bolt off I had to replace the spool assembly which fastens onto the neck of the trimmer. Everything went together smoothly. I didn't have to use any tools to replace the Bump Head Assembly but the shaft assembly with the spool; I used a wrench and philips screwdriver to put it together.
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Broken bump head
Thomas - September 27, 2016
👍 6 of 8 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set
Followed manufacturers diagram, replaced broken parts and tested the trimmer.
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Bump feed knob for line trimmer
stephen - October 23, 2017
👍 3 of 3 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, A little grease
Parts Used
Just screwed it on by hand ....Done, exact replacement
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Thanks for voting and helping fellow customers!
bumper broke
David - October 14, 2021
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, my hands
Parts Used
hand screw thanks you
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The OEM bump knob just wore itself out after 13 years
Wayne - July 27, 2021
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, My hand
Parts Used
Just replaced the old bump knob with the new one. Uber simple.😁
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Worn out. It is 6 years old
Cristina - October 17, 2020
Tool Type
Trimmer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Wrench Set
Took it apart and replaced the parts. Very simple..
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Housing stripped out
James - October 16, 2020
Tool Type
Trimmer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Pliers
removed the remaining clip and removed old housing, replaced and used a socket to install new remaining clip.
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Thanks for voting and helping fellow customers!
Bump Knob would not advance trimmer line
Arthur - August 23, 2018
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Pliers
Parts Used
Held down trimmer line and had to use pliers to loosen old bump knob. Unscrewed old bump knob then screwed on new knob and hand tightened.
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The original knob had broken and would not allow advancement of the trimming string.
DAN - August 10, 2018
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
, Slip-joint pliers
Parts Used
I needed to use pliers to remove the old knob.
The new knob screwed on very easily and the trimmer works like the day I bought it.
The new knob screwed on very easily and the trimmer works like the day I bought it.
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Thanks for voting and helping fellow customers!
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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.
