Echo cs-520

INSTRUCTION MANUAL
CHAIN SAW
WARNING
Read the instructions carefully and follow the rules for safe
operation.
Failure to do so could result in serious injury.
CS-520
X750-005 99 5
X750 319-490 5
ECHO, INCORPORATED
400 Oakwood Road, Lake Zurich, Illinois 60047-1564
Phone : 847-540-8400
Printed in Japan 0608Fd 0805 ES

Echo cs-520 Specifications

General

Engine Displacement	50.2 cc
Engine Type	2-stroke
Bar Length	16, 18, 20 inch
Chain Pitch	0.325 inches
Fuel Capacity	0.59 liters
Power Output	2.7 kW
Fuel Tank Capacity	0.59 liters
Chain Gauge	0.050 inches

Summary

Rules for Safe Operation

Kickback Safety Precautions

Essential precautions for chain saw users to prevent hazardous kickback incidents.

Other Safety Precautions

Nomenclature of Parts

Operator Safety

Eye and Hearing Protection

Correct Use of Chain Brake

Preparation for Use

Guide Bar and Chain Installation

Adjusting Chain Tension

Step-by-step guide on how to properly tension the saw chain.

Fuel and Lubricant

Handling Fuel

Operation

Starting a Cold Engine

Step-by-step instructions for starting the chain saw when the engine is cold.

Starting a Warm Engine

Procedures for starting the chain saw when the engine is already warm.

Running the Engine

Guidelines for operating the chain saw after starting, including idling and acceleration.

Stopping the Engine

Instructions on how to properly shut down the chain saw engine.

Checking Chain Tension

Method for verifying and adjusting the saw chain tension.

Cutting Instruction

General Cutting Tips

Felling the Tree

Detailed instructions on safely felling trees, including notch cutting and retreat paths.

Chain Brake Operation

Testing the Chain Brake

Maintenance and Care

Maintenance Intervals

Carburetor Adjustment

Setting the Saw Chain

Saw Chain Sharpening