Description
Overview:
This Chain Tensioner is a Genuine ECHO part for maintaining precise chain adjustment on compact professional and homeowner chainsaws, including the ECHO CS-2511TES and CS-2510TES. Built with durable metal components, the mechanism advances or retracts the guide bar to set correct chain slack, helping your saw cut efficiently and safely. As a direct replacement for OEM number C309000110, it restores smooth, reliable adjustment when the original unit becomes worn, seized, or damaged. Suitable for regular servicing or repairs, it supports consistent performance in pruning, limbing, and general cutting tasks. Designed to fit a range of ECHO models, it is a practical, long-lasting component that helps prevent premature wear to the bar, chain, and drive sprocket by keeping chain tension within the recommended range.
Key Features:
- Genuine ECHO replacement part (C309000110) for assured fit and compatibility
- Durable metal construction for reliable service life in tough conditions
- Smooth, precise adjustment to maintain correct chain tension
- Helps reduce chain stretch, bar and sprocket wear, and risk of derailment
- Direct swap for the original unit; no modifications required
- Compact OEM design suited to the listed ECHO chainsaw models
- Easy to install with standard hand tools during routine maintenance
- Holds adjustment securely under vibration for consistent cutting performance
- Ideal to replace stripped, seized, or missing adjusters
- Supports safe operation and clean, efficient cutting
Typical Applications:
Replacement and maintenance of the chain tension system on ECHO chainsaws used for pruning, limbing, light felling, and firewood cutting. Commonly fitted during bar and chain changes or when the original adjuster is worn or damaged. Suitable for professional arborists, landscapers, facilities teams, and DIY users who need reliable chain tension to protect cutting components and maintain safety.
Also known as:
Bar adjuster screw, tension screw, adjuster bolt, worm-gear adjuster, chain tension screw, bar positioning screw, chain take-up screw, tensioner assembly.
Fits Models:
250TCS
250TS
251TCS
251TS
251WS
390SX
452S
CS-2510TES
CS-2511TES
CS-2511WES
CS-390ESX
CS-452ESX
CS-500ES
CS500ES
DCS-2500T
Alternate Part Numbers:
C309000110
Product Specifications
| L&S Part No. | ECC309000110 |
|---|---|
| Part Type | Genuine Part |
| Unit of Sale | 1 |
| Applications | 250TCS, 250TS, 251TCS, 251TS, 251WS, 390SX, 452S, CS-2510TES, CS-2511TES, CS-2511WES, CS-390ESX, CS-452ESX, CS-500ES, CS500ES, DCS-2500T |
| Machine Type | Chainsaws |
| Fits Brands | Echo |
| Fits Models | CS-2511TES | CS-2510TES | CS-2511WES | CS-390ESX | CS-452ESX | CS-500ES | DCS-2500T | 251TCS | 251TS | 250TCS | 250TS | 251WS | 390SX | 452S |
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