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Homelite UT21967 - User Manual

Homelite UT21967
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OPERATOR’S MANUAL
MightyLite 26cc VersaTool String Trimmer
UT21566/UT21967
SAVE THIS MANUAL FOR FUTURE REFERENCE
Your trimmer has been engineered and manufactured to our high standard for dependability, ease of operation, and operator
safety. Properly cared for, it will give you years of rugged, trouble-free performance.
Thank you for your purchase.
WARNING: To reduce the risk of injury, the user must read and understand the operator’s manual before using
this product.

Questions and Answers

  • C
    Christopher PalmerAug 17, 2025
    What to do if the string won't advance on my Homelite Trimmer?
    • C
      Christian BrownAug 17, 2025
      If the string on your Homelite Trimmer with the EZ Wind™ Tap Advance system won't advance, try these steps: First, lubricate the string with silicone spray. If that doesn't work, install more string. If the string is worn too short, replace it. If the string is tangled, remove it from the spool and rewind it. Also, make sure to advance the string at full throttle.
  • W
    webstershaneAug 21, 2025
    How to prevent grass from wrapping around my Homelite UT21967?
    • A
      Adam VaughnAug 21, 2025
      To prevent grass from wrapping around the drive shaft housing and string head of your Homelite Trimmer, avoid cutting tall grass at ground level and ensure you operate the trimmer at full throttle. If you are cutting tall grass, cut it from the top down.
  • H
    Hunter MosleyAug 25, 2025
    Why is lubricant dripping from my Homelite Trimmer muffler?
    • J
      Jonathan CurtisAug 26, 2025
      If lubricant drips from the muffler of your Homelite Trimmer, operate the trimmer at full throttle. Also, ensure you are using fresh fuel and the correct 2-cycle lubricant mix. Clean the air filter as well.
  • B
    Brenda ToddAug 28, 2025
    What to do if Homelite Trimmer starts but won't accelerate?
    • C
      Cindy ReevesAug 28, 2025
      If your Homelite Trimmer engine starts but won't accelerate, allow the engine to warm up completely for about three minutes. If it still doesn't accelerate after warming up, contact a servicing dealer.
  • M
    Mr. Stephen LopezSep 1, 2025
    How to adjust idle on Homelite UT21967 Trimmer?
    • M
      margaretwangSep 1, 2025
      If your Homelite Trimmer engine starts, runs, and accelerates but will not idle, adjust the idle speed screw on the carburetor. Turn the idle speed screw clockwise to increase the idle speed.
  • C
    Christopher ReidSep 5, 2025
    Why is the spool retainer hard to turn on my Homelite UT21967?
    • C
      Catherine ScottSep 5, 2025
      If the spool retainer is hard to turn when using the EZ Wind™ Tap Advance system on your Homelite Trimmer, try cleaning the threads and lubricating them with grease. If this doesn't improve the issue, replace the spool retainer.
  • A
    ashley93Sep 9, 2025
    What causes excessive smoke from my Homelite Trimmer?
    • W
      wsuttonSep 9, 2025
      If your Homelite Trimmer engine does not reach full speed and emits excessive smoke, use fresh fuel and the correct 2-cycle lubricant mix. Also, clean the air filter. If the issue persists, contact a servicing dealer.
  • C
    Cathy KellyNov 12, 2025
    How to start a Homelite UT21967 that won't start?
    • N
      Nicole PerkinsNov 12, 2025
      If your Homelite Trimmer engine won't start, begin by checking for a spark. Remove the spark plug, re-attach the spark plug cap, and lay the spark plug on the metal cylinder. Pull the starter rope and look for a spark at the spark plug tip. If there's no spark, try again with a new spark plug. Next, push the primer bulb until it's full of fuel. If it doesn't fill, the primary fuel delivery system might be blocked, and you should contact a servicing dealer. If the primer bulb fills, the engine might be flooded. Remove the spark plug and turn the trimmer so the spark plug hole faces the ground. Rotate the choke dial to the 'RUN' position and pull the starter cord 10 to 15 times to clear excess fuel. Clean and reinstall the spark plug. Pull the starter three times with the choke dial at 'RUN'...

Summary

Assembly: Unpacking and Parts

Assembly: Attachment Connection

Installing Power Head to Attachment

Details how to connect the power head to the trimmer attachment.

Operation: Fueling and Refueling

Fuel Mixture and Refueling

Details the correct gasoline and 2-cycle lubricant mix ratio for the engine.

Filling the Fuel Tank

Step-by-step guide on how to safely refuel the trimmer's fuel tank.

Operation: Engine Handling

Starting and Stopping Procedures

Instructions for starting and stopping the string trimmer engine.

Proper Trimmer Handling and Position

Guidance on how to properly hold and operate the string trimmer.

Operation: Cutting Techniques

Cutting Tips and Safety

Provides advice on effective and safe cutting techniques with the trimmer.

Maintenance: Spool and String

Maintenance: Engine Components

Maintenance: Air Filter and Storage

Troubleshooting: Engine Issues

Engine Will Not Start

Common causes and solutions when the engine fails to start.

Engine Accelerates But Wont Idle

Fixes for engines that accelerate but fail to idle properly.

Engine Runs Only at Half Choke

Solutions for engines running only at high speed with half choke engaged.

Engine Smokes or Lacks Full Speed

Diagnoses problems related to excessive smoke or reduced engine speed.

Engine Starts But Wont Accelerate

Addresses issues with the engine not accelerating after starting.

Troubleshooting: String and Operation

String Not Advancing

Solutions for the trimmer string failing to advance during use.

Homelite UT21967 Specifications

General IconGeneral
Power SourceGas
Engine Type2-Cycle
Engine Displacement25 cc
Line Diameter0.095 in
Starting SystemRecoil
Shaft TypeStraight
Cutting Width17 in

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