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Toro 51993 - User Manual

Toro 51993
30 pages
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Trimmer/Brushcutter
Model No. 51973—260000001 & Up
Model No. 51993—260000001 & Up
English (EN), French (FR), and Spanish (ES)
WARNING:
To reduce the risk of injury, the user must read and understand the operator’s manual. Save this manual.
Form No. 3356-125 Rev. A

Table of Contents

Questions and Answers

  • T
    Tara MyersAug 16, 2025
    Why my Toro Trimmer engine will not start?
    • V
      vgrahamAug 17, 2025
      If the engine of your Toro Trimmer isn't starting, there are several potential causes. First, ensure the switch is in the I (ON) position. If that's not the issue, check for spark by removing the spark plug, reattaching the cap, and laying it on the metal cylinder while pulling the starter cord. If there's no spark, try a new spark plug. Also, make sure the primer bulb is full of fuel; if not, the fuel delivery system may be blocked. Lastly, if the engine is flooded, remove the spark plug, turn the trimmer so the spark plug hole faces the ground, ensure the choke lever is set to RUN, and pull the starter cord 10-14 times to clear excess fuel. Clean and reinstall the spark plug, then try starting again.
  • S
    Steven AndersonAug 19, 2025
    What to do if the line will not advance when using automatic line lengthening on my Toro 51993?
    • M
      Mallory Bailey DDSAug 19, 2025
      If the line on your Toro Trimmer won't advance automatically, several factors could be at play. First, the line might be welded to itself, in which case lubricating it with silicone spray can help. Another reason could be that there's not enough line on the spool, so installing more line is recommended. Also, if the line is worn too short, try pulling it while pressing down on and releasing the retaining cap. Alternatively, the line could be tangled on the spool, requiring you to remove and rewind it. Lastly, ensure the engine speed isn't too slow by advancing the line at full throttle.
  • L
    Leslie SchneiderAug 22, 2025
    How to prevent grass from wrapping around the trimmer head assembly and the attachment shaft of my Toro 51993?
    • K
      Kelly GutierrezAug 23, 2025
      If grass is wrapping around the trimmer head assembly and attachment shaft of your Toro Trimmer, it could be due to cutting tall grass at ground level, so cut tall grass from the top down. Another reason could be operating the product at part throttle, so operate the product at full throttle.
  • T
    Terri RobertsonAug 28, 2025
    Why does my Toro 51993 Trimmer engine not reach full speed and emit excessive smoke?
    • S
      seth69Aug 28, 2025
      If your Toro Trimmer engine doesn't reach full speed and emits excessive smoke, consider the following: * Ensure you are using fresh fuel and the correct 2-cycle oil mix. * Check if the air filter is dirty and clean it if necessary. * Inspect the spark arrestor screen for dirt and clean it.
  • Y
    ybarrettAug 31, 2025
    What to do if the line will not advance on my Toro 51993 Trimmer using automatic line lengthening?
    • J
      juanbrownAug 31, 2025
      If the line on your Toro Trimmer isn't advancing automatically, here's what you can do: * If the line is welded to itself, lubricate it with silicone spray. * If there's not enough line on the spool, install more line. * If the line is worn too short, pull the line while pressing down on and releasing the retaining cap alternately. * If the line is tangled on the spool, remove it and rewind it. * If the engine speed is too slow, advance the line at full throttle.
  • W
    walter06Sep 3, 2025
    Why does grass wrap around the trimmer head assembly and the attachment shaft of my Toro 51993 Trimmer?
    • W
      William SextonSep 3, 2025
      If grass is wrapping around the trimmer head assembly and attachment shaft of your Toro Trimmer: * Avoid cutting tall grass at ground level; instead, cut from the top down. * Ensure you operate the product at full throttle.
  • J
    jessica69Sep 6, 2025
    Why is oil dripping from the muffler of my Toro 51993 Trimmer?
    • M
      matthew06Sep 6, 2025
      If oil is dripping from the muffler of your Toro Trimmer, check the following: * Ensure you are operating the product at full throttle. * Verify that you are using fresh fuel and the correct 2-cycle oil mix. * Inspect the air filter and clean it if it is dirty.
  • J
    Jennifer FosterSep 9, 2025
    What to do if the retaining cap is hard to turn when using automatic line lengthening on my Toro 51993?
    • L
      Lisa GraySep 9, 2025
      If the retaining cap is hard to turn on your Toro Trimmer when using automatic line lengthening, the screw threads may be dirty or damaged. Clean the threads and lubricate them with grease. If this doesn't solve the problem, replace the retaining cap.
  • M
    Michael WangSep 12, 2025
    Why does my Toro 51993 Trimmer engine not reach full speed and emits excessive smoke?
    • L
      Leslie JonesSep 12, 2025
      If the engine of your Toro Trimmer doesn't reach full speed and emits excessive smoke, it could be due to a few reasons. Ensure you're using fresh fuel and the correct 2-cycle oil mix. Also, a dirty air filter or spark arrestor screen can cause this issue, so clean them.
  • P
    Patrick ManningNov 24, 2025
    How to troubleshoot a Toro 51993 engine that will not start?
    • D
      Dominique WaltersNov 24, 2025
      There are several reasons why the Toro Trimmer engine might not start: * The switch may be in the OFF position. If so, set it to the ON position. * There may be no spark. To check, remove the spark plug, reattach the cap, and lay the plug on the metal cylinder. Pull the starter cord and look for a spark at the plug tip. If there's no spark, try again with a new spark plug. * There may be no fuel. Push the primer bulb until it's full. If it doesn't fill, the primary fuel delivery system is blocked; if it does fill, the engine might be flooded. * The engine may be flooded. Remove the spark plug and turn the trimmer so the spark plug hole faces the ground. Ensure the choke lever is set to RUN and pull the starter cord 10 to 14 times to clear excess fuel. Clean and reinstall the plug....

Toro 51993 Specifications

General IconGeneral
TypeString Trimmer
Power SourceGas
Engine Displacement25.4 cc
Cutting Width17 inches
Line Diameter0.095 inches
Line FeedBump Feed
Engine Type2-Cycle
Fuel Tank Capacity14 oz
Weight12.3 lbs
Cutting SystemDual Line
Shaft TypeStraight

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