Easy
Less than 15 minutes
This is a genuine replacement gearbox assembly which was specially 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 made out of metal and it is sold individually. Please note, internal gears or the housing are not sold separately. You will need a screwdriver to complete this repair.
Gear Head 308210009
OEM part for: Ryobi, Homelite
Part Number: 308210009
$25.45
In Stock
Ships within 1 business day 
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Frequently Purchased Together ?
Compatibility
This part will fit the following 109 machines
Ryobi
RY29550 30cc String Trimmer View Diagrams & Manuals
SS30 (RY30002) 30cc String Trimmer View Diagrams & Manuals
SS30 (RY30002A) 30cc String Trimmer View Diagrams & Manuals
RY30002B 30cc String Trimmer View Diagrams & Manuals
SS30 (RY30040) 30cc Straight Shaft String Trimmer View Diagrams & Manuals
RY30040A 30cc String Trimmer View Diagrams & Manuals
RY30040B 30cc String Trimmer View Diagrams & Manuals
SS30 (RY30041A) 30cc String Trimmer View Diagrams & Manuals
SS30 (RY30043) 30cc Straight Shaft String Trimmer View Diagrams & Manuals
RY30140 30cc String Trimmer View Diagrams & Manuals
RY30240 30cc String Trimmer View Diagrams & Manuals
RY30240B 30cc String Trimmer View Diagrams & Manuals
RY30544 30cc String Trimmer View Diagrams & Manuals
RY30550 30cc String Trimmer and Brushcutter View Diagrams & Manuals
RY26520 Trimmer View Diagrams & Manuals
RY26921 Trimmer View Diagrams & Manuals
RY28040 (SS26) 26cc String Trimmer View Diagrams & Manuals
RY13010 4 Cycle Wheeled Trimmer View Diagrams & Manuals
RY34421 4 Cycle Gas String Trimmer View Diagrams & Manuals
RY34440 (S430) Gas String Trimmer View Diagrams & Manuals
RY34441 4 Cycle Gas String Trimmer View Diagrams & Manuals
RY15523 Extended Reach Trimmer Attachment View Diagrams & Manuals
RY30943 30cc String Trimmer View Diagrams & Manuals
RY30542 30cc String Trimmer View Diagrams & Manuals
RY34442 Gas Trimmer View Diagrams & Manuals
RY28041 String Trimmer View Diagrams & Manuals
RY28045 26cc String Trimmer View Diagrams & Manuals
RY15522 Straigt Shaft Trimmer Attachment View Diagrams & Manuals
RY28140 (SS26) String Trimmer View Diagrams & Manuals
RY34446 30cc String Trimmers View Diagrams & Manuals
RY13015 30cc 4-Cycle Wheeled Trimmer View Diagrams & Manuals
RY34445 String Trimmer View Diagrams & Manuals
RY13016 4-Cycle Wheeled Trimmer View Diagrams & Manuals
RY28141 26CC String Trimmers View Diagrams & Manuals
RY34427 30CC String Trimmer View Diagrams & Manuals
RY34447 30CC String Trimmer View Diagrams & Manuals
RY253SS RY253SS 25CC String Trimmer View Diagrams & Manuals
RY30002 RY30002 30CC String Trimmer View Diagrams & Manuals
RY30002A RY30002A 30CC String Trimmer View Diagrams & Manuals
RY30040 RY30040 30CC Straight Shaft String Trimmer (SS30) View Diagrams & Manuals
RY30041A RY30041A 30CC String Trimmer View Diagrams & Manuals
RY30043 30CC Straight Shaft String Trimmer (SS30) View Diagrams & Manuals
RY15527 (311247006) Straight Shaft Trimmer Attachment View Diagrams & Manuals
RY15527VNM (311247106) Straight Shaft Trimmer Attachment View Diagrams & Manuals
RY15523A (313351003) Trimmer Attachment View Diagrams & Manuals
RYSST44 (090110014) Expand-It Straight Shaft Trimmer Attachment View Diagrams & Manuals
RY15523AVNM (313284101) Trimmer Attachment View Diagrams & Manuals
RY15526VNM Straight Shaft Trimmer Attachment With 3-In-1 Trimmer Head Accessories View Diagrams & Manuals
RY34007 (RY34427)(RY34447)(090432017)(090432018)(090432019) 30cc String Trimmers View Diagrams & Manuals
RY4CSS (090432024) 30cc String Trimmers View Diagrams & Manuals
RYSST44 (090110013) Expand-It Straight Shaft Trimmer Attachment View Diagrams & Manuals
RY30040 (SS30) 30cc Straight Shaft String Trimmer View Diagrams & Manuals
RY15526 Straight Shaft Trimmer Attachment With 3-In-1 Trimmer Head Accessories View Diagrams & Manuals
P2009 (107291001) Cordless String Trimmer View Diagrams & Manuals
UT33600 (090330011) 26cc String Trimmer Ut-33600 26cc String Trimmer View Diagrams & Manuals
RY34007 (RY34427)(RY34447)(090432020)(090432021)(090432022) 30cc String Trimmers View Diagrams & Manuals
RY28040 26cc String Trimmer View Diagrams & Manuals
RY30043 (SS30) 30cc Straight Shaft String Trimmer View Diagrams & Manuals
RY15523A Trimmer Attachment View Diagrams & Manuals
UT33650 (090330012) 26cc String Trimmer Ut-33650 26cc String Trimmer View Diagrams & Manuals
RY34440 30cc String Trimmer View Diagrams & Manuals
RY28140 26cc String Trimmers View Diagrams & Manuals
RY4CSS (090432027) 30cc String Trimmers View Diagrams & Manuals
RY4CSS (090432030) 30cc String Trimmers View Diagrams & Manuals
RY4CSS (090432035) 30cc String Trimmers View Diagrams & Manuals
RYSST44 (090110015) Expand-It Straight Shaft Trimmer Attachment No. View Diagrams & Manuals
UT-33600 String Trimmer 26cc View Diagrams & Manuals
UT-33600 (090330011)(2016-11) String Trimmer 26cc Rev 02 View Diagrams & Manuals
UT-33650 String Trimmer 26cc View Diagrams & Manuals
UT-33650 (090330012)(2016-11) String Trimmer 26cc Rev 02 View Diagrams & Manuals
RY253SSVNM Ry253ssvnm 25cc String Trimmer Mfg. No. 095333109 3-9-21 (Rev:02) View Diagrams & Manuals
RY34007 (RY34427)(RY34447)(090432018) Ry34007, Ry34427, Ry34447 30cc String Trimmers Mfg. No. 090432017, 090432018, And 090432019 View Diagrams & Manuals
RY4CSS Ry4css 30cc String Trimmers Mfg. No. 090432040 9-23-20 (Rev:01) View Diagrams & Manuals
RYSST44VNM Rysst44vnm Expand-It Straight Shaft Trimmer Attachment Mfg. No. 095110101 8-10-21 (Rev:03) View Diagrams & Manuals
Homelite
UT-20042 25cc EZ Reach String Trimmer View Diagrams & Manuals
UT-20042-A 25cc EZ Reach String Trimmer View Diagrams & Manuals
UT-20043-A 25cc EZ Reach String Trimmer View Diagrams & Manuals
UT22600 26cc String Trimmer View Diagrams & Manuals
UT22650 26cc String Trimmer View Diagrams & Manuals
UT20044B 25cc String Trimmers View Diagrams & Manuals
UT32600 Curved Shaft String Trimmer View Diagrams & Manuals
UT32650 Straight Shaft String Trimmer View Diagrams & Manuals
UT-21044 Mightylite String Trimmer View Diagrams & Manuals
UT-29045 Mightylite String Trimmer View Diagrams & Manuals
UT20004A (TrimLite) 25 CC String Trimmer View Diagrams & Manuals
UT20004B (TrimLite) 25cc String Trimmer View Diagrams & Manuals
UT32651 String Trimmer View Diagrams & Manuals
UT15522E Expand-It Trimmer View Diagrams & Manuals
UT15522F Expand-It Straight Shaft Trimmer View Diagrams & Manuals
UT200044A 25cc String Trimmer View Diagrams & Manuals
UT21046 Trimmer View Diagrams & Manuals
UT29047 Trimmer View Diagrams & Manuals
UT32000 26cc String Trimmers View Diagrams & Manuals
UT32050 26cc String Trimmers View Diagrams & Manuals
UT32601A 26cc String Trimmers View Diagrams & Manuals
UT32651A 26cc String Trimmers View Diagrams & Manuals
UT32605A 26cc String Trimmers View Diagrams & Manuals
UT32655A 26cc String Trimmers View Diagrams & Manuals
UT20044A (EZ Reach) 25cc String Trimmer View Diagrams & Manuals
UT32605 26cc String Trimmers View Diagrams & Manuals
UT32655 26cc String Trimmers View Diagrams & Manuals
UT33600 26cc String Trimmer View Diagrams & Manuals
UT33650 26CC String Trimmer View Diagrams & Manuals
RY30140 30cc String Trimmer View Diagrams & Manuals
RY30240B 30cc String Trimmer View Diagrams & Manuals
RY30240 30cc String Trimmer View Diagrams & Manuals
RY30544 30cc String Trimmer View Diagrams & Manuals
RY30550 30cc String Trimmer And Brushcutter View Diagrams & Manuals
RY30542 30cc String Trimmer View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Trimmer Parts
This part replaces obsolete part #: 308053004, 984244001, 308210002
Customer Part Reviews ?
Average Rating (out of 5):
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Exactly the right part for my ryobi 40v trimmer
Exactly the right part for my ryobi 40v trimmer. Had it working like new. Hassle free buying experience.
Guest -
May 16, 2023
Verified Purchase
Easy repay
It arrived very quickly and easy to install. Great service.
Guest -
June 19, 2022
Verified Purchase
So easy to replace the head of my weed eater. I was pleasantly surprised!
I got a nice new head for my weed eater and had it up and running again in just a few minutes. Better then new.! It's a lot less expensive then getting a whole weed eater. I like to repair all my own equipment myself.
Bruce -
August 11, 2021
Verified Purchase
Excellent fit
Fit like new, and now time to get cutting on the yard.
Manuel M. -
February 16, 2021
Verified Purchase
Part for weed eater.
It arrived very fast and fit perfectly thanks so much. Janice
Janice -
October 5, 2019
Verified Purchase
Ryobi Wheeled Trimmer Gearhead.
Arrived on time - is as advertised. Paid just a few bucks more to get it a few days quicker.
Guest -
August 19, 2019
Verified Purchase
Great Service and part
Customer service rep helped me find the correct part needed. Shipped fast and accurately.
Guest -
August 19, 2019
Verified Purchase
very cool
I bought a new trimmer , my push & load trimmer head wouldn't work , that's why I put a new gear head on it !!
Guest -
July 29, 2019
Verified Purchase
Easy Repair
Fit perfect and weed eater working like New!
Guest -
July 1, 2019
Verified Purchase
as expected
perfect, arrived quick, works well
Guest -
June 28, 2019
Verified Purchase
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t days ago
Verified Purchase
eReplacementParts Team
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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 Gear Head
I am replacing the old string head assembly from 2019 with a 309562008. How do I get the old assembly off? Do I need a new gear head and string head adapter?
Bill
for model number RY15523A
asked on 2022-03-15
Hello Bill, Thank you for the question. No, the string head assembly is easily removed from the unit by twisting the retainer clockwise. This is a reversed threaded retainer. I hope this helps and good luck with your repair.
eReplacementParts Team March 15, 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.
Broken
Thomas - July 17, 2016
👍 12 of 15 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Medium
Time
Less than 15 minutes
Tools Used
Screwdriver, Socket set, Vice
Parts Used
Removed the old gear head and installed the new. Started the trimmer and all works fine.
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Gear was bad
David - April 28, 2018
👍 5 of 6 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set
Parts Used
Removed and replaced. Easy!
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Gear head was stripped out
boyd - December 2, 2017
👍 4 of 5 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Socket set
Parts Used
Removed old gear head, line up the new one tightened it up. Cranked up trimmer and it worked just like it did when it was brand new.....very easy to complete
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Shaft adapter was broken.
Ida - July 28, 2016
👍 3 of 4 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Pliers
Parts Used
Took off the hardware and removed the gearbox, then put the new one one, then attached the shaft adapter.
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Thanks for voting and helping fellow customers!
Gear head bearing worn out
Art - April 7, 2017
👍 2 of 3 people found this instruction helpful
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Socket set, Adjustable Wrench
Parts Used
Removed the bolts hold the old gear head on and removed it.
Bolted on the new gear head it its place
Bolted on the new gear head it its place
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Gear head would not rotate
Bruce - November 30, 2022
Tool Type
Edger
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Socket set
Tools
Ratchet socket and punch
Removed and replaced the gear head with a punch in the slot of the gear case then turning the gear head clockwise to remove did reverse to install
Ratchet socket and punch
Removed and replaced the gear head with a punch in the slot of the gear case then turning the gear head clockwise to remove did reverse to install
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broke head
Rickey - September 26, 2022
Tool Type
Trimmer
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Wrench Set
Parts Used
Replaced broke head
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The screw threads were stripped
Craig - June 18, 2022
Tool Type
Trimmer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Socket set, Adjustable Wrench
Parts Used
Removed the screws from the old part, slid it off the shaft, slid the new one on and replaced the screws.
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Trimmer head sized up, would not turn.
Bruce - August 14, 2021
Tool Type
Trimmer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Wrench Set
Parts Used
Removed the screws that held the head on and installed the new head.
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Replaced gear head
Scott - July 9, 2021
Tool Type
Trimmer
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Wrench Set
Parts Used
Followed instructions
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Thanks for voting and helping fellow customers!
Load More Install Stories
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.
