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EGO ST1620T - User Manual

EGO ST1620T
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WARNING: To reduce the risk of injury, the user must read and understand the
Operator’s Manual before using this product. Save these instructions for future reference.
Español p. 73
Français p. 35
OPERATOR'S MANUAL
56-VOLT LITHIUM-ION
CORDLESS
16" STRING TRIMMER
MODEL NUMBER
ST1620T/ST1620T-FC

Table of Contents

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Questions and Answers

  • S
    Shelly ClarkJul 28, 2025
    Why won't my EGO ST1620T Trimmer start?
    • G
      Gerald HardyJul 28, 2025
      If your EGO Trimmer isn't starting, several factors could be at play. First, ensure the battery pack is properly attached. If it is, remove the battery, inspect the contacts, and then re-install it to ensure a solid connection. A depleted battery can also cause this issue, so charge the battery pack fully. Make sure that you move the lock-off switch forward before depressing the variable speed trigger. Lastly, check the motor shaft and trimmer head for any grass obstructions, and remove them if present.
  • R
    Robert RamseyAug 1, 2025
    How to fix the cutting line if it cannot be wound into the EGO ST1620T Trimmer head properly?
    • C
      cookmadisonAug 1, 2025
      If the cutting line can't be properly wound into the EGO Trimmer head, ensure you're using the recommended EGO original nylon cutting line. Debris accumulation can obstruct the line spool's movement; remove the battery, open the trimmer head, and clean it thoroughly. Also, the motor may be overheated due to repeatedly operating the line winding system, so let the string trimmer work under no load for a few minutes to cool the motor, then try to reload the line. A low battery capacity can cause this issue as well, so charge the battery. Ensure the line is wound into the spool assembly by pulling it out and reinserting it.
  • C
    Courtney HarmonAug 5, 2025
    What to do if the cutting line cannot be passed through the EGO ST1620T head?
    • T
      Thomas ParkerAug 5, 2025
      If the cutting line cannot be passed through the EGO Trimmer head when inserting the line, it might be split or bent at the end. Cut the worn end of the line and reinsert it.
  • V
    Valerie LewisAug 9, 2025
    What to do if my EGO Trimmer stops while cutting?
    • J
      James ParkerAug 10, 2025
      Your EGO Trimmer might stop during operation due to several reasons. Check if the guard is properly mounted; an unmounted guard can lead to an overly long cutting line and motor overload. Using the recommended nylon cutting line with a diameter of 0.095 in. (2.4 mm) is also important. Overheating can cause the trimmer to stop, so allow the battery pack or string trimmer to cool down. Also, make sure that the battery pack is correctly installed and charged.
  • R
    Regina MorrisAug 13, 2025
    Why is my EGO Trimmer head not advancing line?
    • J
      james15Aug 13, 2025
      If the trimmer head on your EGO Trimmer isn't advancing the line, the motor shaft or trimmer head might be bound with grass. Stop the trimmer, remove the battery, and clean these components. Also, make sure that there is enough line on the spool. If the line is tangled, remove the battery, then remove the line from the trimmer head and rewind it. If the line is too short, remove the battery and pull the lines manually while alternately pressing down and releasing the trimmer head. Using the recommended nylon cutting line with a diameter of 0.095 in. (2.4 mm) is also important.
  • C
    cfergusonAug 18, 2025
    How to prevent grass from wrapping around the EGO Trimmer head?
    • L
      lcoxAug 18, 2025
      To prevent grass from wrapping around the trimmer head and motor housing of your EGO Trimmer, avoid cutting tall grass at ground level. Instead, cut tall grass from the top down, removing no more than 8 inches in each pass.
  • S
    Sonya WoodardAug 22, 2025
    What to do if the blade is not cutting the line on my EGO ST1620T?
    • K
      Karen LopezAug 22, 2025
      If the blade on your EGO Trimmer isn't cutting the line, the line-cutting blade on the edge of the guard may have become dull. Sharpen the line-cutting blade with a file or replace it with a new blade.

Summary

SAFETY SYMBOLS

Symbol Meaning and Warnings

Explains safety alert symbols, general warnings, and eye protection requirements.

Safety Alert Symbol Definition

Indicates DANGER, WARNING, or CAUTION, used with other symbols or pictographs.

GENERAL BATTERY-OPERATED POWER TOOL SAFETY WARNINGS

Work Area Safety

Keep work area clean, avoid explosive atmospheres, keep children and bystanders away.

Personal Safety Precautions

Stay alert, use PPE, prevent unintentional starting, maintain footing and balance.

BATTERY TOOL USE AND CARE

Battery Pack and Charger Guidelines

Recharge with specified charger, use correct battery packs, store properly, handle with care.

STRING TRIMMER SAFETY INSTRUCTIONS

Cutting Line and Guard Safety

Use correct nylon line, avoid wire, replace damaged head/guard.

Operational Safety Warnings

Check for abnormal operation, ensure guards are attached, avoid wet locations.

INTRODUCTION

Product Overview and Support

Congratulations, product design, and customer service contact info.

Record Keeping

Advise recording serial number and date of purchase for future reference.

SPECIFICATIONS AND ACCESSORIES

Product Specifications

Details voltage, speed, cutting width, temperature, and weight.

Recommended Accessories and Packing List

Lists accessories and included items in the package.

DESCRIPTION OF STRING TRIMMER COMPONENTS

Know Your String Trimmer

Identifies key parts of the string trimmer with a diagram.

Front Handle and Controls

Describes adjustable front handle, variable trigger, lock-off switch, speed switch, indicator.

Safety and Cutting Features

Explains the guard and the line-cutting blade for safety and performance.

Trimmer Head and Battery Mechanism

Details height clamp, trimmer head, POWERLOAD, hinge, battery release, latch, and ejection.

ASSEMBLY

Unpacking Instructions

Steps for removing and inspecting product and accessories from the box.

UNFOLDING THE SHAFT

MOUNTING THE GUARD

MOUNTING AND ADJUSTING THE FRONT HANDLE

ADJUSTING THE TRIMMER HEIGHT

ATTACHING SHOULDER STRAP

OPERATION

Application of Trimmer

Lists approved uses like trimming grass and weeds around obstacles.

Battery Pack Installation;Removal

Instructions for installing and removing the battery pack.

STARTING;STOPPING AND SPEED ADJUSTMENT

Starting and Stopping the Trimmer

Steps to start, stop, and control speed using the variable trigger.

Speed Adjustment Function

Explains the 2-speed switch and indicator for low/high speeds.

TIPS FOR BEST TRIMMING

Trimming Techniques and Best Practices

Correct angle, not forcing, cutting height, and handling tall grass.

Avoiding Damage to Surroundings

Advice on trimming near fences, walls, trees, and shrubs.

ADJUSTING THE CUTTING LINE LENGTH

LINE REPLACEMENT

POWERLOAD System Operation

How to wind line using the POWERLOAD button.

Cutting Line Specifications

Use 0.095 in. (2.4 mm) nylon line; avoid metal reinforced line.

RELOAD THE CUTTING LINE

MAINTENANCE

Trimmer Head Replacement

Warning and instruction to replace cracked or damaged trimmer heads.

TRIMMER HEAD SERVICE

Remove the Trimmer Head

Steps to remove the spool assembly and bushing from the motor shaft.

Install the New Trimmer Head

Steps to mount the bushing and spool assembly with a nut.

UNIT CARE AND STORAGE

Cleaning the Unit

Instructions for cleaning the trimmer with a damp cloth and mild detergent.

Sharpening the Line-Cutting Blade

Steps to remove, sharpen, and replace the line-cutting blade.

Transporting and Storing the Unit

Remove battery and clean tool before storing in a dry, ventilated area.

TROUBLESHOOTING

Trimmer Fails to Start

Lists causes like battery issues, lock-off switch, or bound shaft.

Trimmer Stops While Cutting

Causes include guard issue, heavy line, overheating, or disconnection.

Trimmer Head Line Advancement Issues

Problems with line advancement due to bound shaft, line issues, or malfunction.

Grass Wrapping Issues

Cutting tall grass incorrectly can cause wrapping around head/motor.

Blade Not Cutting Line

Dull line-cutting blade requires sharpening or replacement.

Trimmer Head Cracks

Worn trimmer head needs immediate replacement.

Cutting Line Winding Problems

Issues with winding line due to improper line, debris, motor heat, or low battery.

Cutting Line Insertion Issues

Cutting line is split or bent at the end, preventing insertion.

WARRANTY INFORMATION

EGO Warranty Policy Details

Details limited warranty periods for equipment, batteries, and chargers.

Limited Service Warranty Terms

Covers defects in material/workmanship; details warranty for residential/commercial use.

Warranty Limitations and Exclusions

Void conditions like rental, modification, misuse, abuse, and normal wear.

How to Obtain Service

Contact customer service, present sales receipt, potential deposit for repair.

Additional Warranty Limitations

Disclaims implied warranties; limits liability for damages.

EGO ST1620T Specifications

General IconGeneral
BrandEGO
ModelST1620T
CategoryTrimmer
LanguageEnglish

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