Easy
Less than 15 minutes
This is a genuine OEM sourced replacement part designed to work with string trimmers. This part is attached to the lower boom assembly and it is what drives/spins the trimmer head. It is secured to the unit with two (2) screws. Internal gears or the gear box are not sold separately. This assembly includes the trimmer head. To complete this repair you will need a screwdriver.
Gear Box Assembly 753-06165
OEM part for: Bolens, MTD, Yard Machines, Troy-Bilt
Part Number: 753-06165
$62.93
In Stock
Ships within 1 business day 
Compatibility
This Gear Box Assembly will fit the following 17 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Displaying 17 of 17 matching models.
17 total model matches. Try the above search to narrow your results.
This is the official OEM part for the following brands:
- Bolens
- MTD
- Troy-Bilt
- Yard Machines
This item works with the following types of products:
- Trimmer
Repair Videos ?
Watch the Repair Video for
Gear Box Assembly
Articles:
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Step-by-step instructions for removing and installing the gearbox on your Bolens string trimmer....
June 25, 2018
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Customer Part Reviews ?
Average Rating (out of 5):
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Thank You
Thank you parts is working Great in my Weed eater
Guest -
May 26, 2022
Verified Purchase
Easy repair
exactly what I needed, fit perfectly, works perfect.
paul -
November 2, 2021
Verified Purchase
Easy repair, Id order again in a second
There was really nothing wrong with my trimmers gearbox, but the entire bump head assembly was worn and needed replacing. Ordering this included all of the parts for both the gearbox and the bump head (even came preloaded with trimmer line). All I needed to do was unscrew 3 screws, slide on the assembly and the tighten 3 new screws. Definitely the way to go! Shipping was quick 4 days (even during COVID) and buying the full assembly this was cost about half as much as ordering the individual replacement parts.
Guest -
June 8, 2020
Verified Purchase
Easy Repair
This was exactly what I needed to repair my weed trimmer, & at a much more affordable price than local repair shops. Trimmer works great now! I will definitely shop here in future.
Guest -
May 13, 2020
Verified Purchase
Was a easy switch
Speedy response came in new condition
Guest -
July 30, 2019
Verified Purchase
works perfect thanks
on time every time
Guest -
May 28, 2019
Verified Purchase
They sell what you ask, worked perfectly
It was in excellent conditions, it works my money
Guest -
May 7, 2019
Verified Purchase
Questions & Answers ?
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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.
The gears were ground to nothing. There weren't any teeth on either gear.
James - April 22, 2016
👍 7 of 8 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, N/a
Parts Used
It was an easy fix. Philips screw driver. Three screws to take gear box off the shaft, and three screws to put the new one on, and tighten the screws up. Good as new.
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Trimmer was erratic, off-balance, jumpy. With the motor off, spinning the end by hand, you could feel a bearing was bad.
Richard - May 21, 2017
👍 3 of 3 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
30-60 minutes
Tools Used
, torx bits
Parts Used
Unscrewed the old gear box and screwed the new one on...worked fine, plus I like the lighter string that came with it. Been using .095 but the 080 feels smoother. Then I ordered two new sealed bearings from and installed them in the old gearbox, so I have a spare.
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Nothing worked perfectly
Frank - April 20, 2017
👍 3 of 3 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Unscrewed the old one and pulled off the shaft. Pushed the new one the onto shaft and tightens down with new screws that were provided the with gear box. Very easy to do.
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Gear box assembly was broken on weed trimmer
Kathleen - August 23, 2016
👍 3 of 3 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Quick and simple install. My son just unscrewed the old gear box assembly, placed the new assembly on and screwed it in place. All hardware was included in the package.
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Bearings in gear box went out
Kane - May 17, 2016
👍 2 of 2 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, grease
Parts Used
Bearings in old gear box that holds the trimmer head went out fairly fast. Bought the gear box assembly and it's 3 star bit screws to remove the old one and also to install the new one. Upon removing the old one I opened it up and noticed there was only a small amount of grease in the assembly. When the new one came in I opened it as well to make sure the little bearings had grease in them and they didn't. That makes since as to why the old ones didn't last so long. I removed the new bearings and packed them with grease as best as I could. Moral of the story is bearings need some type of grease or they wear out quickly. Easy fix as far replacing the trimmer gear box goes but you might need a little experience on packing the bearings with grease.
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Gear box was stripped
Trace - May 17, 2016
👍 1 of 1 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver
Parts Used
Unscrewed three screws holding the gear box, then removed it. Screw the new gear box on with the threes screws you get with the new part, and you are done.
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Stripped gear in gearbox
Brad - December 26, 2015
👍 4 of 7 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Wrench Set
Parts Used
Removed the screws securing the defective gearbox from the lower shaft and removed it. Then simply slid the new gearbox on the shaft and used the screws, included with it to secure it to the lower shaft.
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bearing in trimmer head( for lack of grease from manufactor caused bearing to seeze.)..
karl - September 1, 2020
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, driver bit socket and blue lock tight
Parts Used
replaced the head and made sure had ample of grease around bearings..
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The line trimmer head was frozen to the gear box so I replaced both in one shot
John - April 8, 2019
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, A Torx bit made it much easier to beak the old screws loose
Parts Used
1 Remove set screw, loosen the other two gear box screws on the shaft side.
2 pull the old gear box assembly off the shaft.
3 slide on new gearbox assembly,align with driveshaft, tighten screws.
The new bump head already has line on it.
Done!!! Back to new bump head performance
2 pull the old gear box assembly off the shaft.
3 slide on new gearbox assembly,align with driveshaft, tighten screws.
The new bump head already has line on it.
Done!!! Back to new bump head performance
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Gears stripped out inside gear box
Robert - October 3, 2018
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver
Parts Used
Removed three screws replace gear box, done, that simple.
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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.
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