Medium
1-2 hours
This replacement part is supplied directly from the original equipment manufacturer. It is specially designed for snowblowers. The worm gear is part of the drive mechanism that rotates the augers. It is utilized to connect to the worm shaft in order to engage it. Over time the part may wear out or get damaged eventually requiring a replacement to ensure the unit is functioning properly. Keep in mind this high-quality worm gear is made of durable metal and is sold individually. Refer to the diagrams of your model for the correct installation of the new part. You may need a screwdriver and a wrench set to take the housing apart in order to perform this repair.
Gear-worm 20t 917-04861
OEM part for: MTD, Ryobi, Yard Machines, Bolens, Yard Man, Craftsman, Troy-Bilt, Cub Cadet, Husky
Part Number: 917-04861
$43.57
In Stock
Ships within 1 business day 
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Frequently Purchased Together ?
Compatibility
This Gear-worm 20t will fit the following 2649 machines. Confirm this part works with your model, and view the detailed model diagrams and repair help we have to offer.
Ryobi
MTD
Yard Machines
Bolens
Yard Man
Craftsman
Troy-Bilt
Cub Cadet
Husky
Show More Compatible ModelsThis item works with the following types of products:
- Snowblower Parts
- Lawn Tractor Parts
This part replaces obsolete part #: 917-0528A, 717-04861, 717-04449, 717-0528A, 717-0528, 917-0528
Customer Part Reviews ?
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snow blower auger gear
The part was easy to order. The parts diagrams are very easy to identify the part you need. The prices are always great.
Guest -
July 24, 2023
Verified Purchase
Exact part
Was worried I might order the wrong piece for my snowblower and they diagram and parts list made it easy!
Gregory -
February 27, 2023
Verified Purchase
Snowblower repair
Snowblower repair Receive the right part in a reasonable time job is complete thanks
Guest -
June 13, 2022
Verified Purchase
Worm gear
Part exactly what I thought it was and works awesome! Shipment was way to slow and long took two weeks to get!
Donald -
January 20, 2022
Verified Purchase
was easier then I thought.
Should send new key with gear, would be nice.
Guest -
October 29, 2021
Verified Purchase
they help alot by looking up the part and helping me find the diagram
my part was good got it sooner then I thought
Guest -
October 14, 2021
Verified Purchase
OEM part delivered 1 day before promised. What more could anyone want?
Eady to use website made ordering easy. Promised delivery in 5 days, it arrived in 4. Snow blower is up and running. I'd recommend ereplacementsparts to anybody, in fact I already have.
Guest -
February 17, 2021
Verified Purchase
Snowblower working like new. Part fit perfectly.
The part was Craftsman, arrived quickly and was exactly as described.
Guest -
February 21, 2020
Verified Purchase
perfect fit
Perfect fit oem quality
Guest -
November 27, 2019
Verified Purchase
Perfect match
Sometimes you order a part online to the description you get the wrong part. Not here, we have ordered before and always come back to great replacement parts and fast service in getting what we need.
Guest -
November 27, 2019
Verified Purchase
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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 auger worm gear was stripped on my Troybilt snowblower. I found a YouTube video explaining how to do the repair.
Dale - February 6, 2016
👍 17 of 18 people found this instruction helpful
Tool Type
Snowblower
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Socket set
Parts Used
There is an excellent YouTube video showing how to do this repair. I also replaced the belts since I already had the snowblower split. As in any repair, pay close attention to how parts go together when you take things apart. I am not a pro by any means so I have learned to label parts, lay them out in order, and take pictures with my phone.
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Worm shaft and gear stripped
Dana - January 23, 2017
👍 6 of 6 people found this instruction helpful
Tool Type
Snowblower
Difficulty
Medium
Time
1-2 hours
Tools Used
Socket set, rotary tool
Removed housing from snow blower to gain access to bolt holding the worm shaft. removed worm assembly and disassembled. Removed blower fan from old worm shaft by drilling out pins. (drilling pins was the hardest part). Used rotary tool to grind high spots of shaft so I could remove the worm gear. Scraped and sanded sides of auger assembly to remove old silicone. Filled auger assembly with grease and installed new shaft and worm gear. Put auger assembly back together with silicone. Put blower fan on new shaft with pins and installed into housing. Attached housing to snowblower. Mounted belts.
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Worm gear worn out
Alfred - August 23, 2017
👍 4 of 4 people found this instruction helpful
Tool Type
Snowblower
Difficulty
Medium
Time
More than 2 hours
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set, Adjustable Wrench
Disassembled snowthrower front and rear parts. Removed front bucket augers and drive shaft from main body. Removed auger drive assembly gear box. Replaced worm gear. Had to use a gasket material to seal gear box. Re-assembled in reverse order. Replaced shave plate on bottom of bucket.
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Snowblower auger driven gear broken
jerry - March 27, 2017
👍 3 of 3 people found this instruction helpful
Tool Type
Snowblower
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set
Parts Used
Removed the Auger assembly
Removed the right side auger blades
Opened the gearbox
Removed the broken gear
Replaced the gear with new one
Filled the gearbox with new grease
Put sealant on gearbox flanges
Bolted gearbox back together
Reinstalled right side auger blades
Lubricated bushings on ends of Auger assembly
Reinstalled Auger assembly into Snowblower
Ran Snowblower to make sure everything worked properly.
Removed the right side auger blades
Opened the gearbox
Removed the broken gear
Replaced the gear with new one
Filled the gearbox with new grease
Put sealant on gearbox flanges
Bolted gearbox back together
Reinstalled right side auger blades
Lubricated bushings on ends of Auger assembly
Reinstalled Auger assembly into Snowblower
Ran Snowblower to make sure everything worked properly.
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Auger would not spin.
jeff - March 7, 2018
👍 2 of 2 people found this instruction helpful
Tool Type
Snowblower
Difficulty
Medium
Time
1-2 hours
Tools Used
Pliers, Socket set, Nutdriver
Parts Used
I watched a few YouTube videos before I ordered parts and attempted to repair my snowblower. They were extremely useful in solving the problem.
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Auger not working on Toro snowblower
Jacques - January 3, 2016
👍 4 of 6 people found this instruction helpful
Tool Type
Snowblower
Difficulty
Easy
Time
30-60 minutes
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set
Parts Used
Removed and disassembled auger and gearbox per your tube video. Carefully cleaned gearbox of brass gear filings. Checked output shaft to ensure it is not ruined. I ordered brass gear and seal which arrived quickly through ereplacement parts. Reassembled using EP00 grease. Fairly simple as long as you keep parts in order and saved a couple of hundred dollars.
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Worm gear driver the auger blades stripped
Keven - March 10, 2018
👍 1 of 1 people found this instruction helpful
Tool Type
Snowblower
Difficulty
Medium
Time
1-2 hours
Tools Used
Socket set, Wrench Set, Hammer
1. Watched instructional video online (Not much help).
2. Removed augers / shaft.
3. Removed gear (Was simple once I figured out it just tapped off).
4. Reassembled the gear case and auger / shaft for install. This took a couple tries and was the most difficult part of the repair. It is a very tight fit and interesting with only two hands.
5. Tightened all components and reinstalled plastic covers and chute.
6. Pulled the rope and everything worked as normal.
2. Removed augers / shaft.
3. Removed gear (Was simple once I figured out it just tapped off).
4. Reassembled the gear case and auger / shaft for install. This took a couple tries and was the most difficult part of the repair. It is a very tight fit and interesting with only two hands.
5. Tightened all components and reinstalled plastic covers and chute.
6. Pulled the rope and everything worked as normal.
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Worm gear thrust bearing spring pin broke,damaging worm gear
francis - December 7, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Snowblower
Difficulty
Easy
Time
More than 2 hours
Tools Used
Screwdriver, Socket set, Wrench Set
Parts Used
1. Remove blower from power unit
2. Remove blower, auger and drive assembly
3. Disassemble auger gear assembly
4. Replace worm gear and thrust bearing pin
5. Reassemble
2. Remove blower, auger and drive assembly
3. Disassemble auger gear assembly
4. Replace worm gear and thrust bearing pin
5. Reassemble
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Worm gear was severely worn
Mark - April 9, 2017
👍 1 of 1 people found this instruction helpful
Tool Type
Snowblower
Difficulty
Medium
Time
More than 2 hours
Tools Used
Pliers, Socket set, Adjustable Wrench
Removed front end of snowblower. Disassembled auger, replaced worm gear. Reassembled auger and front end of snowblower.
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Sheared the brass auger gear inside the gear box
Jamie - February 17, 2022
Tool Type
Snowblower
Difficulty
Medium
Time
1-2 hours
Tools Used
Screwdriver, Pliers, Socket set, Wrench Set, Gasket scraper,silicone,brush,brake cleaner,grease
Removed front scoop,Removed pulley, removed bolts the 3 bolts on each side holding the augers in place. Removed the whole !auger assembly from scoop. Removed 4 shear pins, pulled off 4 augers blades "2RH 2LH" and plastic spacers/bushings. Removed 5 bolts holding the 2 case halves and separated case. Cleaned thoroughly and scraped old gasket "silicone". Replaced gear with new one. Also replaced the keyway and shear pin. Replaced the 3 shaft oil seals also. Reverse procedure to assemble. Using silicone and grease to assemble. Use diff oil where applicable.
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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.
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.
