Easy
Less than 15 minutes
The Chain Cover Assembly is an original part from Ryobi. This part is used with a Ryobi Chainsaw and covers both the clutch and the sprocket, and includes the bar adjuster assembly. The most common reason to replace the Chain Cover Assembly is wear or damage to the bar adjuster due to over tightening the screw. This part is made of plastic and metal components and is sold as an individual replacement part.
Chain Cover Assembly 300957019
OEM part for: Ryobi
Part Number: 300957019
$7.82
In Stock
Ships within 1 business day 
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Compatibility
This part will fit the following 9 machines
Ryobi
RY10519 Chainsaw View Diagrams & Manuals
RY10521 Chainsaw View Diagrams & Manuals
RY10519A 46CC Chain Saw View Diagrams & Manuals
RY10521A 46CC Chain Saw View Diagrams & Manuals
RY10519B RY10519B 46CC Chainsaw View Diagrams & Manuals
RY10521B RY10521B 46CC Chainsaw View Diagrams & Manuals
RY5020 (090840005) 50cc Chain Saw View Diagrams & Manuals
RY5020 (090840001) 50cc Chain Saw View Diagrams & Manuals
RY5020 Ry5020 50cc Chain Saw Mfg. No. 090840007 8-4-21 (Rev:04) View Diagrams & Manuals
Show More Compatible Models
This item works with the following types of products:
- Chain Saw Parts
- Saw Parts
Customer Part Reviews ?
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Thank you
Fit like a glove and now I can tension up the chain easier
Scott Herbert -
September 16, 2023
Verified Purchase
Excellent
Nice
Guest -
May 9, 2023
Verified Purchase
Good quality product.
Made for a quick and easy fix at a good price.
Guest -
August 30, 2022
Verified Purchase
Easy repair
The tensioner part for my chainsaw fit perfectly thank you for the great service
Guest -
January 4, 2021
Verified Purchase
Two nut repair, part of ongoing maintenance
Ryobi side plate arrived, nice, put it on chain saw, like a brand new racing machine, thanks
Guest -
June 27, 2020
Verified Purchase
This fit my C4618 Ryobi chain saw
The chain tightening screw had stripped out on my saw and this was a perfect match!! So thankful for this! I would buy from this company again!!
Guest -
January 29, 2020
Verified Purchase
wear part
part i received was a perfect match to factory part
Guest -
June 26, 2019
Verified Purchase
Exact fit
Fit exactly. Perfect replacement. Great price.
Guest -
June 25, 2019
Verified Purchase
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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.
Adjusting screw stripped
Dewayne - November 4, 2016
👍 5 of 5 people found this instruction helpful
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Wrench Set
Parts Used
Removed the two nuts put the new cover on adjusted the chain tension then tightened the two nuts down
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Pieces worn out
Pamela - July 11, 2016
👍 3 of 3 people found this instruction helpful
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Adjustable Wrench
Just remove the screws and nuts from both parts and install the new ones.
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Could not tighten the chain
Jerome - May 19, 2016
👍 2 of 2 people found this instruction helpful
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Wrench Set
Parts Used
The chain cover with the tightening assembly was broken. Replaced it with a new cover assembly. Working great now. All you need to do is remove two nuts and remove the broken cover, then install the new cover with the nuts.
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Wouldn't tighten chain.
Matt - July 5, 2018
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Socket set
Parts Used
Removed old one and installed new one.
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Chain would not tighten
David - May 27, 2017
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Nutdriver
Parts Used
1 Remove 2 nuts
2 Remove defective cover
3 Install new cover
4 Finger tighten 2 nuts
5 Adjust chain tension
6 Secure 2 nuts with wrench
2 Remove defective cover
3 Install new cover
4 Finger tighten 2 nuts
5 Adjust chain tension
6 Secure 2 nuts with wrench
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Saw guides got messed up by my step-son who used my saw last. This allowed the chain to walk left or right while trying to cut a log which will get the bar in a bind if log is thick.
Brent - April 20, 2017
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Used supplied saw tool to remove nuts and chain cover, removed chain and bar, removed inner guide(it just slides over the bar studs), replaced bar and chain with a new cover which holds the outer guide and tensioner. I adjusted the chain and tightened the cover nuts. Good to go.
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Chain wouldn't adjust
Ricky - March 21, 2016
👍 1 of 2 people found this instruction helpful
Tool Type
Chain Saw
Difficulty
Medium
Time
30-60 minutes
Tools Used
Screwdriver, Socket set, Wrench Set
Remove chain cover and guide bar plate, replace with new. Work great now
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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.
