Echo CS-310

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X7503275401

© 02/2019 ECHO Inc.

Operator’s

Manual

CS-310

CHAIN SAW

The engine exhaust from this product contains chemicals

known to the State of California to cause cancer, birth defects,

or other reproductive harm.

Read and understand all provided literature before

use. Failure to do so could result in serious injury.

This product complies with CAN ICES-2/NMB-2.

Table of Contents

Other manuals for Echo CS-310

Service Manual75 pages

Instruction Manual44 pages

Questions and Answers:

J
Jennifer SheppardSep 12, 2025
What to do if Echo CS-310 engine runs, but dies or does not accelerate properly?
- K
  Katherine HeathSep 12, 2025
  If your Echo Chainsaw engine runs but dies or does not accelerate properly, consider the following: * A dirty air filter: Clean or replace it. * A dirty fuel filter: Replace it. * A plugged fuel vent: Clean or replace it. * A dirty or worn plug: Clean and adjust or replace it. * Improper adjustment: Adjust it. * A dirty or plugged cooling system: Clean it. * A plugged spark arrestor screen: Replace it.
M
Michael JohnsonSep 13, 2025
Why does my Echo CS-310 engine run, but then dies or doesn't accelerate properly?
- P
  patricia46Sep 13, 2025
  If your Echo Chainsaw engine runs but then dies or doesn't accelerate properly, the issue could stem from several causes. A dirty air filter, a dirty fuel filter, or a plugged fuel vent could be the problem. The spark plug might be dirty or worn, or the carburetor may be improperly adjusted. The cooling system could be dirty or plugged, or the spark arrestor screen could be plugged. Try cleaning or replacing the air filter, replacing the fuel filter, cleaning or replacing the fuel vent, cleaning and adjusting or replacing the spark plug, adjusting the carburetor, cleaning the cooling system, or replacing the spark arrestor screen to resolve the issue.
J
Joy FosterSep 15, 2025
Why does my Echo CS-310 engine run, but die or not accelerate properly?
- R
  Ronald ArmstrongSep 15, 2025
  Your Echo Chainsaw might be experiencing issues with acceleration or may die while running due to several reasons. The air filter, fuel filter, or fuel vent may be dirty or plugged, requiring cleaning or replacement. The spark plug could be dirty, worn, or improperly adjusted, so clean and adjust it or replace it. The cooling system might be dirty or plugged, so clean it. Also, the spark arrestor screen could be plugged, so replace it. Improper adjustment may also be the root cause, so adjust it.

Echo CS-310 Specifications

General

Engine Displacement	30.5 cc
Bar Length	14 inches
Weight	8.8 lbs
Chain Pitch	3/8 inch
Chain Gauge	0.050 inch

Summary

Servicing Information

PartsSerial Number

Service

ECHO Consumer Product Support

Safety

Rules For Safe Operation

General rules to follow for safe operation of the chainsaw.

TO AVOID KICKBACK

Instructions on how to avoid kickback when operating the chainsaw.

Correct Use Of Chain Brake

Instructions on how to properly operate and use the chain brake.

TESTING THE BRAKE

Procedure to test if the chain brake is functioning correctly.

AUTOMATIC CHAIN BRAKE

Steps to ensure the automatic chain brake operates properly.

Personal Condition and Safety Equipment

Safety considerations for operator's physical condition and required safety gear.

Eye Protection

Importance of wearing eye protection that meets ANSI Z87.1 or CE requirements.

Hand Protection

Recommended gloves for grip, protection against cuts, cold, and vibration.

HearingEar Protection

Proper Clothing

Guidelines for snug-fitting, durable clothing and footwear.

Repetitive Stress Injuries (RSI)

Emission Control

Preparation For Use

Tip Guard to Bar Instructions

Guide Bar and Saw Chain InstallationRemoval

Adjusting Chain Tension

Operation

Fuel

Requirements for gasoline and two-stroke oil, and warnings about fuel usage.

Handling Fuel

Extreme care instructions for mixing, storing, and handling flammable fuel.

Mixing Instructions

Step-by-step guide for mixing fuel and oil at a 50:1 ratio.

Chain Lubricant

Starting Cold Engine

Safety precautions and steps for starting a cold engine.

Starting Warm Engine

Safety precautions and steps for starting a warm engine.

Running

Instructions on how to operate the chainsaw safely after starting.

Stopping

Checking Chain Tension

Chain Lubrication Test

Cutting Instructions

General guidelines for cutting wood with the chainsaw.

Felling The Tree

Step-by-step guide for safely felling a tree with the chainsaw.

Limbing

Bucking

Maintenance

Maintenance Intervals

Carburetor Adjustment

Engine Break-In

Air Filter

Spark Plug

Check Fuel System

Fuel Filter

Oil Filter

Guide Bar

Sprocket

Cooling System Cleaning

Spark Arrestor Screen

Exhaust Port Cleaning

Setting The Saw Chain

Troubleshooting

ENGINE PROBLEM TROUBLESHOOTING CHART

Chart listing engine problems, checks, causes, and remedies.

Storage

Long Term Storage (Over 30 Days)

Specifications

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