Easy
15-30 minutes
This tensioner screw is an authentic manufacturer approved replacement part. It is specially produced for use with Echo chainsaws. This kit allows you to tighten or loosen the chain. If the bar doesn’t adjust when you turn the tension screw commonly the tension gear/pin or the screw/bolt is worn or damaged. Replacing it should resolve the issue. This tensioner screw is made out of metal and it is sold individually.
Tensioner Screw 43301638330
OEM part for: Echo
Part Number: 43301638330
$4.99
In Stock
Ships within 1 business day 
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Compatibility
This part will fit the following 11 machines
Echo
CS-440 (08001001 - 08007504) Chainsaw View Diagrams & Manuals
CS-440 (08007505 - 08999999) Chainsaw View Diagrams & Manuals
CS-440 (10001001 - 10999999) Chainsaw View Diagrams & Manuals
CS-440 (C07013001001 - C07013999999) Chainsaw View Diagrams & Manuals
CS-440 (C09112001001 - C09112999999) Chainsaw View Diagrams & Manuals
CS-4400 (Type 1) (After S/N 001001) Chainsaw View Diagrams & Manuals
CS-4400 (Type 1E) (001001 - 101000) Chainsaw View Diagrams & Manuals
CS-4400 (Type 1E) (After S/N 101001) Chainsaw View Diagrams & Manuals
CS-440 (08001001-08999999) Chainsaw Lawn Equipment View Diagrams & Manuals
CS-4400 (1)(001001-101000) Chainsaw Lawn Equipment View Diagrams & Manuals
CS-4400 (1E)(101001-999999) Chainsaw Lawn Equipment View Diagrams & Manuals
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This item works with the following types of products:
- Chain Saw Parts
- Saw Parts
Customer Part Reviews ?
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Worked excellent
Staff very helpful and courteous. Explained to me exactly what is was I needed. So glad to have found this place. Now I have a magnet on my fridge from them and know exactly who to call.
Guest -
April 13, 2023
Verified Purchase
All the correct parts
After Colin a replacement parts customer service person was able to help me with all the necessary parts needed they were shipped in a timely manner and I received and fixed my chainsaw everything fit perfectly
Guest -
March 3, 2022
Verified Purchase
great would buy again
great part it did the job,my chainsaw is ready to use again,thanks
larry -
December 5, 2019
Verified Purchase
Just what I was looking for
Stripped original part Ereplacement parts was a very convenient source
Guest -
June 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.
Tensioner screw bent
Michael - December 28, 2020
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver
Removed cover and chain, then tensioner cover.
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Chain bar would not stay adjusted, after numerous attempts of adjusting. Finally realized what the issue was.
B - September 17, 2019
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Nutdriver
1. Removal chain socket cover
2. Use flash light to inspect the tension screw & tensioner for being bent or striped.
3. Replace is in poor condition.
4. Start to finish is less than 30 minutes.
2. Use flash light to inspect the tension screw & tensioner for being bent or striped.
3. Replace is in poor condition.
4. Start to finish is less than 30 minutes.
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While changing the chain, I did not align theadjusting tensioner pin into the bar hole. When I tightened the bar hold down nuts, the tensioner screw was severely bent.bent
Dan - September 7, 2019
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Socket set
1. Removed the 2 bar hold down nuts.
2. Removed side cover with bar chain brake.
3. Removed the chain and bar.
4. Cleaned all inside surfaces.
5. Removed the tensoiner cover screw and plate.
6. Removed the old tensioner and adjusting screw.
7. Replaced old tensioner and adjusting screw.
8. Replaced tensioner cover and screw.
9. Reassembled the above.
10. Adjusted the chain with new tensioner screw.
2. Removed side cover with bar chain brake.
3. Removed the chain and bar.
4. Cleaned all inside surfaces.
5. Removed the tensoiner cover screw and plate.
6. Removed the old tensioner and adjusting screw.
7. Replaced old tensioner and adjusting screw.
8. Replaced tensioner cover and screw.
9. Reassembled the above.
10. Adjusted the chain with new tensioner screw.
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Tensioner threads stripped
William - April 4, 2018
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Socket set
1. Removed chain cover
2. Replaced tensioner
3. Replaced chain cover
2. Replaced tensioner
3. Replaced chain cover
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Tensioner screw was bent. Plus it was time to tune up the saw
joe - September 7, 2017
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Wrench Set, Small hook to pull gas and oil filters out of tanks
Exploded diagram of saw, helped with the parts I needed and YouTube always has good video with procedures and tips on these kind of repairs.
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Screw tensioner was bent so the chain could not be adjusted.
james - July 24, 2017
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Wrench Set
Removed the bent screw and replaced with the new one. Easy to see what was wrong once the cover was removed. No special tools needed.
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Screw was bent
joseph - June 2, 2017
Tool Type
Chain Saw
Difficulty
Easy
Time
Less than 15 minutes
Tools Used
Screwdriver, Pliers
Parts Used
Removed bent screw with screw driver. Replaced with new
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Tensioner screw was bent.
William - May 14, 2017
Tool Type
Chain Saw
Difficulty
Easy
Time
15-30 minutes
Tools Used
Screwdriver, Wrench Set
Removed the handhold/sprocket cover, removed the chain guide. Pulled out the old screw and the tensioner. Installed the new screw and the tensioner. Very simple repair.
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The tensioner screw was broken in half.
William - February 21, 2017
Tool Type
Chain Saw
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver
Parts Used
Disconnect the tensioner screw assembly and reinstall the screw.
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Tensioner Bent
Frank - January 19, 2017
Tool Type
Chain Saw
Difficulty
Medium
Time
15-30 minutes
Tools Used
Screwdriver, Pliers, Nutdriver
Removed the chain brake assembly( Make sure it is in the unlocked position)
Remove the inner guide place
Remove the old tensioner screw and tensioner, and install the new ones
Put the parts that were removed back on, and your done
Remove the inner guide place
Remove the old tensioner screw and tensioner, and install the new ones
Put the parts that were removed back on, and your done
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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.
