Echo CS-310 Chainsaw Manual: Carburetor Adjustment & Starting Instructions

Idle adjusting screw

Low speed needle (L)	High speed needle
	(H)

Engine Break-In

New engines must be operated a minimum dura- tion of two tanks of fuel break-in before carbure- tor adjustments can be made. During the break-in period your engine performance will increase and exhaust emissions will stabilize. Idle speed can be adjusted as required.

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.

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 ad- justed.

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:

•Start engine, turn “Idle” speed adjustment 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 1/4 turn.

WARNING

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 3200 r/min.

CAUTION

When starting, idling adjustment speed should be adjusted not to rotate the saw chain. Correct idle speed is adjusted 2,800 - 3,150 r/min. Or 1/4 turn CCW from the point the chain stops moving.

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

CS-310

CS-310 specifications

The Echo CS-310 is a lightweight, highly efficient chainsaw designed for homeowners and light-duty professionals who require portability and reliability. This model stands out in the market due to its combination of performance, ease of use, and innovative features, making it an ideal choice for various cutting tasks.

One of the standout features of the Echo CS-310 is its powerful 30.5cc engine. This engine is designed to deliver exceptional performance while maintaining fuel efficiency, making it suitable for extended use in garden and yard maintenance. With a maximum power output of 1.3 horsepower, it provides ample power for cutting through branches, logs, and firewood with ease.

The engine incorporates a high-efficiency, two-stroke design that not only optimizes fuel consumption but also minimizes harmful emissions. This eco-friendly approach ensures that the Echo CS-310 meets stringent environmental standards while still delivering outstanding cutting capabilities. The chainsaw's easy starting system is another plus, as it features a unique primer bulb and a decompression valve that simplifies the starting process, allowing users to get to work quickly and without frustration.

The lightweight design of the CS-310, weighing in at just around 8.8 lbs, makes it highly maneuverable. This is essential for users who may need to navigate through tight spaces or work overhead for extended periods. Coupled with an ergonomic handle, the chainsaw provides a comfortable grip that reduces fatigue during use, making long sessions less taxing on the operator.

Equipped with a 14-inch bar and chain, the Echo CS-310 strikes a perfect balance between cutting performance and usability. The chain is designed for optimal cutting speed and durability, ensuring reliable operation across various materials. Additionally, the tool-less chain tensioning system allows users to easily adjust the chain tension without the need for any tools, enhancing convenience between cuts.

Safety features are also a focal point of the Echo CS-310, incorporating a chain brake that automatically stops the chain in case of kickback, reducing the risk of accidents during operation. The chainsaw's rear-handle design provides added stability and control, further improving user safety.

In conclusion, the Echo CS-310 chainsaw offers an exceptional blend of lightweight design, powerful performance, and user-friendly features, making it an excellent choice for both casual users and those tackling regular outdoor chores. Whether trimming trees or cutting firewood, this model delivers reliability and efficiency, satisfying diverse cutting needs while emphasizing safety and comfort.