Echo CS-680 Carburetor Adjustment, Idle adjusting screw High speed needle H Low speed needle L

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Idle adjusting screw

 

High speed needle (H)

Low speed needle (L)

 

CARBURETOR ADJUSTMENT

Every unit is run at the factory and the carburetor is set in compliance with Emission Regulations.

In addition, the carburetor is equipped with “H” (High Speed) and “L” (Low Speed) needle adjustment limiters that prevent settings outside acceptable limits.

1.Before adjusting carburetor clean or replace air filter and muffler “Spark Arrestor Screen”.

2.Make sure the bar and chain are properly adjusted.

3.Start engine and run several minutes to bring to operating temperature.

Flash choke twice during warm-up to clear any air from the fuel system.

4.Stop engine.

Turn “H” speed needle counterclockwise (CCW) to stop.

Turn “L” speed needle midway between full clockwise (CW) stop and CCW stop.

5.Idle Speed Adjustment:

ss3TARTAENGINE ETURN h)DLEv SPEEDUADJUSTMENT screw CW until the saw chain begins to turn, then turn screw out CCW until the saw chain stops turning.

Turn screw out, CCW, an additional ¼ turn.

WARNING

High Altitude Operation

This engine has been factory adjusted to maintain satisfactory starting, emission, and durability performance up to 1100 feet above sea level (ASL) (96.0 kPa).

To maintain proper engine operation and emission compliance above 1100 feet ASL the carburetor may need to be adjusted by an authorized ECHO service dealer.

IMPORTANT

If the engine is adjusted for operation above 1100 feet ASL, the carburetor must be readjusted when operating the engine below 1100 feet ASL, otherwise severe engine damage may result.

CS-680

Cutting attachment must not move when unit is idling.

6.Accelerate to full throttle for 2 - 3 seconds to clear any excess fuel in the engine, then return to idle.

Accelerate engine to full throttle to check for smooth transition from idle to high speed.

If engine hesitates turn “L” needle CCW 1/8 turn and repeat acceleration.

Continue adjustment until smooth acceleration results.

7.Check idle speed and reset if necessary as described in item 5.

If a tachometer is available idle speed should be set to 2900 r/min.

CAUTION

When starting, idling adjustment speed should be adjusted not to rotate the saw chain.

Correct idle speed is adjusted 2900 r/min. Or ¼ turn CCW from the point the chain stops moving.

When you experience trouble with the carburetor, contact your dealer.

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Contents ECHO, Incorporated X750-012 20 X750 316-510Copyright 2008 All Rights Reserved Rules for Safe Operation CS-680Other Safety Precautions Contents Symbols and SignsDecals Symbol FormStop Idle speedEcho chain saw Warranty sheetPacking List Nomenclature of Parts X505-002041 Part NumberChain tension adjuster Device to adjust Manual oil pump Device for proper lubrication of chainOperator Safety Spark Arrestor Muffler Safety Requirement for chain sawsCorrect USE of Chain Brake Ansi Standard B175.1Guide BAR and SAW Chain INSTALLATION/REMOVAL Preparation for USEAdjusting Chain Tension Gasoline Oil Gallons US. fl. oz 160 12.8 400 Fuel and LubricantFuel Statement Emission Control Emission DataHandling Fuel Cap indication OperationChain Lubricant ChokeOpen When the Engine is ColdWhen the Engine is Warm firing sound, pull throttle trigger to release chokeChecking Chain Tension RunningStopping Chain Lubrication TestKickback Cutting InstructionGeneral Felling the Tree Uphill position Finish cut First cut Board or flat stones LimbingBucking Chain brake function Testing the BrakeChain Brake Operation Chain brake unlockStop the engine Automatic Chain BrakeWinter Operation SAW Chain Chain and Guide BAR CombinationGuide BAR Component / system Maintenance procedure Maintenance and CareMaintenance Intervals Skill LevelsCS-680 Cutting attachment must not move when unit is idling Carburetor AdjustmentIdle adjusting screw High speed needle H Low speed needle L Turn screw out, CCW, an additional ¼ turnSpark Plug AIR FilterCheck Fuel System Fuel FilterMuffler Spark Arrestor SprocketCylinder Fins Automatic OilerHold the file tipped 10 upward Setting the SAW ChainSetting SAW Chain CS-680 Cause Remedy TroubleshootingProblem Ss 3TOREOIN a DRY Area Freerfrom DUST Technical DataStorage After USE Warranty Statements ExceptionsPurchased Repair PARTS, Short Blocks and Accessories CS-680 C03203001001/C03203999999
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Manual 32 pages 23.5 Kb

CS-680 specifications

The Echo CS-680 is a powerful and versatile chainsaw designed for both professional arborists and enthusiastic homeowners. Renowned for its reliability, performance, and ease of use, the CS-680 stands out in the competitive chainsaw market. It is particularly useful for those who need to tackle demanding cutting tasks while ensuring precision and control.

One of the main features of the CS-680 is its robust 67.9 cc engine, which provides an impressive power-to-weight ratio. This high-displacement engine delivers ample torque and speed, enabling users to easily cut through hardwoods and take on larger cutting projects. The chainsaw’s engine is equipped with a patented decompression valve that ensures easier starts, especially in cold weather. This feature significantly reduces the effort required to pull the starter rope, making it an excellent choice for users who may not have the strength of professional operators.

The Echo CS-680 comes with a 20-inch bar, allowing for deep cuts while maintaining maneuverability. Its precision-engineered chain ensures clean cuts and reduces kickback, enhancing safety during operation. The saw's automatic chain lubrication system keeps the chain properly lubricated during use, increasing its lifespan and performance. Additionally, the side-access chain tensioner allows for quick and easy adjustments without the need for additional tools, ensuring minimal downtime during projects.

Another notable characteristic of the CS-680 is its vibration-dampening technology. This system reduces the amount of vibration transmitted to the operator, leading to enhanced comfort during long periods of use. This is especially beneficial for professionals who rely heavily on their tools and need to mitigate fatigue.

The construction of the Echo CS-680 incorporates high-quality materials, providing rugged reliability. It features a heavy-duty air filter system that extends engine life by ensuring maximum air cleanliness. The chainsaw is also designed with a lightweight yet durable frame, making it easy to handle while still being tough enough to withstand the rigors of heavy use.

In summary, the Echo CS-680 chainsaw combines power, efficiency, and user-friendly features, making it an excellent choice for anyone looking to tackle serious cutting tasks with confidence. Its innovative technologies and engineering provide reliability and performance, ensuring it can handle the toughest jobs while remaining comfortable for the operator. Whether for professional or personal use, the Echo CS-680 is a dependable tool that meets the demands of its users.
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