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Echo HC-155 - User Manual

Echo HC-155
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X7502259500
© 11/2017 ECHO Inc.
ENGLISH
Specifications, descriptions and illustrative material in this literature are
as accurate as known at the time of publication, but are subject to
change without notice. Illustrations may include optional equipment and
accessories, and may not include all standard equipment.
Operator’s Manual
x7722271404 / x772000164
HC-155
HEDGE TRIMMER
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 operator’s manual (and safety
manual if included) before use. Failure to read the
manuals could result in serious injury.
This product complies with CAN ICES-2/NMB-2.

Table of Contents

Questions and Answers

  • J
    jeffrey42Jul 26, 2025
    Why is my Echo Trimmer engine hard to start?
    • M
      Michael RamirezJul 26, 2025
      If your Echo Trimmer engine is hard to start or doesn't start, it could be due to several reasons. The fuel strainer or fuel line might be obstructed, requiring cleaning or replacement by your Echo dealer. A fuel mixture that's too rich could also be the culprit; in this case, open the choke, clean or replace the air filter, adjust the carburetor, or consult your Echo dealer. Ensure the stop switch is in the ON position and check for electrical problems with your Echo dealer. Finally, inspect the spark plug for incorrect gap, carbon buildup, fuel fouling, or defects; adjust the gap to 0.65mm (0.026 in.) or replace the plug as needed.
  • A
    Amanda RuizJul 31, 2025
    What to do if Echo Trimmer engine runs, but dies?
    • O
      Oscar BaileyJul 31, 2025
      If your Echo Trimmer engine runs but dies or doesn't accelerate properly, the air filter might be dirty and needs cleaning or replacing. Also, the fuel filter could be dirty, requiring replacement of the filter or the fuel itself. Other potential issues include a plugged fuel vent (clean or replace), a dirty or worn spark plug (clean and adjust or replace), improper adjustment (adjust), a dirty or plugged cooling system (clean), or a plugged spark arrestor screen (replace).
  • M
    Michael NicholsAug 5, 2025
    Why does my Echo Lawn and Garden Equipment engine crank but not start?
    • S
      Scott Hill MDAug 5, 2025
      Your Echo Lawn and Garden Equipment engine might crank but not start due to several reasons. The fuel strainer or fuel line could be clogged, requiring cleaning or replacement. Other potential causes include a carburetor issue, electrical problem, or interlock switch malfunction, all of which require attention from your Echo dealer. Also, check if the stop switch is off. The spark plug could have an incorrect gap, needing adjustment to .65mm (0.026 in.), or it may be covered with carbon or fouled with fuel, in which case it should be cleaned or replaced. Finally, the plug itself might be defective and need replacement.
  • Y
    yhillAug 10, 2025
    What to do if my Echo Lawn and Garden Equipment engine cranks but won't start?
    • N
      Nicole MyersAug 10, 2025
      If your Echo Lawn and Garden Equipment engine cranks but doesn't start, it could be due to a lack of fuel at the carburetor or a clogged fuel system. Try cleaning or replacing the carburetor. If the fuel strainer or fuel line is clogged, clean or replace those components as well. For more complex fuel system issues, consult your Echo dealer.
  • C
    caitlinsalazarAug 15, 2025
    What to do if my Echo HC-155 engine runs but dies?
    • J
      Jessica GravesAug 16, 2025
      If your Echo Lawn and Garden Equipment engine runs but then dies or doesn't accelerate properly, consider these potential causes. The air filter, fuel filter or fuel vent might be dirty or plugged, requiring cleaning or replacement. The spark plug could be dirty, worn, or improperly adjusted, so clean and adjust or replace it. A dirty or plugged cooling system could also be the cause, so clean it. Finally, the spark arrestor screen might be plugged and needs replacement.
  • J
    Jake SmithAug 20, 2025
    Why does my Echo Lawn and Garden Equipment engine run but die or not accelerate properly?
    • L
      levinecatherineAug 20, 2025
      Your Echo Lawn and Garden Equipment engine might be dying or failing to accelerate due to several reasons. A dirty air filter, fuel filter, or spark plug can cause these issues. Try cleaning or replacing these components. A plugged fuel vent can also be the culprit; clean or replace it to resolve the issue. Additionally, improper carburetor adjustment or a dirty cooling system can lead to these problems; adjust the carburetor or clean the cooling system accordingly. Finally, a plugged spark arrestor screen can also cause this; replace it to resolve the issue.

Summary

Introduction

Servicing Information

Parts;Serial Number

Details on obtaining genuine ECHO parts and recording serial numbers.

Echo Consumer Product Support

Contact information for customer assistance and support.

Product Registration

Instructions for registering your ECHO equipment online or by mail.

Additional or Replacement Manuals

Information on how to obtain additional operator or safety manuals.

Safety

Manual Safety Symbols and Important Information

Explanation of safety alerts, symbols, and key words used in the manual.

International Symbols

Definitions and meanings of international safety symbols used in the manual.

Personal Condition and Safety Equipment

Guidelines for operator's physical condition and required safety equipment.

Eye Protection

Requirements for eye protection during operation.

Hand Protection

Recommendations for wearing gloves for grip and protection.

Hearing;Ear Protection

Recommendation for wearing hearing protection.

Breathing Protection

Advice on wearing dust masks for sensitive operators.

Proper Clothing

Guidelines for appropriate clothing, including what not to wear.

Extended Operation; Extreme Conditions

Precautions for operating in cold weather or prolonged periods.

Repetitive Stress Injuries (RSI)

Information on RSI and prevention methods, including carpal tunnel.

Work Area Safety

Safe work area practices, grip, stance, and avoiding hot surfaces.

Emission Control (Exhaust & Evaporative)

CARB And EPA Emissions Control Information

Details on emission control systems and compliance for CARB and EPA regulations.

An Emission Control Label

Explanation of the emission control label located on the engine.

Product Emission Durability (Emission Compliance Period)

Definition of the emission compliance period for engine emissions.

Description

Safety Decals

Locating and understanding safety decals on the unit.

Operation

Fuel

Approved fuel types, gasoline, and two-stroke oil requirements.

Fuel Handling

Safe practices for handling fuel, including mixing and storage.

Mixing Instructions

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

Storage

Guidelines for storing fuel and the unit itself.

Starting Cold Engine

Step-by-step procedure for starting the engine from a cold state.

Starting Warm Engine

Procedure for starting the engine when it is already warm.

Stopping Engine

Instructions on how to properly stop the engine.

Hedge Trimming

Techniques and safety precautions for trimming hedges with the unit.

Maintenance

Skill Levels

Explanation of maintenance task difficulty levels (1, 2, 3) for DIY.

Maintenance Intervals

Schedule and frequency for performing maintenance tasks on the unit.

Air Filter

Procedure for inspecting, cleaning, or replacing the air filter.

Fuel Filter

Instructions for inspecting and replacing the fuel filter.

Spark Plug

Procedure for checking, cleaning, and adjusting the spark plug gap.

Cooling System

Instructions for cleaning the cooling system and air intakes.

Spark Arrestor Screen

Procedure for removing and cleaning the spark arrestor screen.

Exhaust Port Cleaning

Steps for cleaning carbon deposits from the exhaust port and muffler.

Carburetor Adjustment

Guidelines for adjusting the carburetor for optimal performance.

Engine Break-In

Procedure for breaking in a new engine before adjustments.

High Altitude Operation

Considerations for operating the engine at high altitudes.

Blades Lubrication

Instructions for lubricating the hedge trimmer blades.

Gear Box Lubrication

Procedure for lubricating the gear box with grease.

Sharpening

Procedure for sharpening the hedge trimmer blades.

Adjustment

Instructions for adjusting the blade locking nuts.

Troubleshooting

Blade Tightening

Ensuring blade screws and lock nuts are securely tightened.

Engine Problem Troubleshooting Chart

Chart listing common engine problems, causes, and remedies.

Storage

Long Term Storage (Over 30 Days)

Procedure for preparing the unit for storage exceeding 30 days.

Specifications

Product Registration

Notes

Echo HC-155 Specifications

General IconGeneral
BrandEcho
ModelHC-155
CategoryLawn and Garden Equipment
LanguageEnglish

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