Products Description
Echo CS-680 Chainsaw Carburetor – Genuine OEM & Aftermarket Replacement
Butterfly-Valve Diaphragm Carburetor for 66.8cc Professional Chainsaw
This carburetor is a direct replacement for the fuel delivery system on the Echo CS-680 professional chainsaw. Designed for the 66.8cc 2-stroke engine, this butterfly-valve diaphragm carburetor (without purge pump) provides precise fuel-air mixing for reliable starting, smooth idling, and consistent cutting power . A clogged or faulty carburetor is one of the most common causes of hard starting, stalling, and rough running-often due to old fuel leaving sticky residue that blocks internal passages . This replacement restores proper fuel metering and eliminates performance issues.
Technical Profiles & Materials
OEM-Spec Echo HDA-271 Replacement – The genuine Echo carburetor (A021001802, HDA-271) ensures perfect compatibility and reliable performance for CS-680 saws . For CS-680S models, OEM A021001682 (HDA-257A) is specified .
Professional-Grade Construction – Manufactured from durable materials designed to withstand high-vibration, high-temperature chainsaw operation . Genuine Echo parts deliver unmatched reliability and performance for commercial use .
Restores Engine Performance – Resolves common issues caused by clogged carburetors, including stalling, hard starting, and loss of power . Optimizes fuel-air mixture for efficient combustion and enhanced throttle response .
Butterfly-Valve Diaphragm Design – This carburetor type (without purge pump) is specified for standard CS-680 models . Compatible with the SAIS ignition system and professional-grade engine platform.
Technical Specifications
| # | Parameter | Specification |
|---|---|---|
| 1 | OEM Part No. (Standard) | A021001802 (HDA-271) |
| 2 | OEM Part No. (CS-680S) | A021001682 (HDA-257A) |
| 3 | Engine Compatibility | Echo CS-680, CS-680S (66.8cc 2-stroke) |
| 4 | Carburetor Type | Butterfly-Valve Diaphragm (without purge pump) |
| 5 | Ignition System Compatibility | SAIS |
| 6 | Fuel Capacity | 21.6 fl. oz. |
| 7 | Material | Durable metal construction |
| 8 | Installation | Direct OEM replacement |
| 9 | Warranty | 5-year consumer / 1-year commercial (OEM) |
Products Application
Professional Forestry & Logging
The CS-680 is Echo's most popular felling saw, designed for professionals who depend on reliable performance . The HDA-271 carburetor ensures consistent fuel delivery for demanding cutting tasks, from felling large timber to bucking logs. Available with 20", 24", and 27" bar lengths, the saw's carburetion system supports heavy-duty use .
Troubleshooting Starting & Stalling Issues
If the CS-680 starts but stalls, a clogged carburetor is often the cause . Old fuel left in the chainsaw evaporates, leaving a sticky substance that blocks internal passages. Replacing the carburetor is the most direct solution . OEM part A021001802 guarantees compatibility and restores factory performance.
Commercial-Grade Repair & Maintenance
For repair centres and forestry workshops, genuine Echo carburetors provide guaranteed fitment and durability. The butterfly-valve diaphragm design (without purge pump) is the specified configuration for standard CS-680 models . CS-680S models require the HDA-257A variant (A021001682) .
Quality and Craftsmanship Details
Products Package
About Us
As a premier garden machinery parts supplier, Jiaxing Norsun Trading Co., Ltd. bridges global distributors with over 100 vetted China manufacturers. We streamline your B2B supply chain through strict quality control, flexible production, and factory-direct wholesale pricing. Partner with us for reliable, high-volume sourcing of precision-engineered outdoor power equipment components.
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FAQ
Q: How do I confirm which carburetor fits my Echo CS-680?
A:Check your chainsaw model number on the housing. Standard CS-680 uses OEM part A021001802 (HDA-271) . CS-680S models use OEM A021001682 (HDA-257A) . Verify your model variant before ordering.
Q: What causes carburetor failure on the CS-680?
A: The most common cause is old fuel left in the chainsaw for extended periods . Fuel ingredients evaporate, leaving a sticky residue that clogs the carburetor's internal passages . This causes stalling, hard starting, and power loss. Regular fuel maintenance and using fresh fuel can prevent carburetor issues.
Q: Can I use an aftermarket carburetor for my CS-680?
A: While aftermarket options may be available, genuine Echo OEM parts (A021001802) guarantee perfect compatibility, lasting durability, and cleaner emissions . Genuine parts are backed by Echo's 5-year consumer / 1-year commercial warranty . For professional use, OEM is strongly recommended.
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