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Toro 51976 - User Manual

Toro 51976
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17 in. String Trimmer - Curved Shaft
Model No. 51956—312000001 & Up
18 in. String Trimmer - Straight Shaft
Model No. 51976—312000001 & 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. 3373-446 Rev. A
If you have questions concerning
your trimmer, please call us
at 1-866-574-9242 (US) or
1-866-574-9243 (Canada).
NOTICE: Do not use E15 or E85
fuel (or fuel containing greater
than 10% ethanol) in this product.
It is a violation of federal law and
will damage the unit and void your
warranty.

Table of Contents

Questions and Answers

  • C
    Casey MooreAug 10, 2025
    What to do if the line will not advance on my Toro Trimmer?
    • P
      Paul Schmidt IIAug 10, 2025
      If the line on your Toro Trimmer isn't advancing when using the automatic line lengthening feature, consider these potential causes: the line might be welded to itself (lubricate with silicone spray), there might not be enough line on the spool (install more line), the line might be worn too short (pull the line while alternately pressing down on and releasing the retaining cap), the line could be tangled on the spool (remove the line and rewind it), or the engine speed might be too slow (advance the line at full throttle).
  • M
    Mikayla CampbellAug 21, 2025
    Why does my Toro Trimmer engine not reach full speed and emit excessive smoke?
    • K
      Katherine DayAug 22, 2025
      If your Toro Trimmer's engine isn't reaching full speed and is emitting excessive smoke, start by checking the oil/fuel mixture to ensure you are using fresh fuel and the correct 2-cycle oil mix. Additionally, a dirty air filter or spark arrestor screen could be the cause. Therefore, clean the air filter and the spark arrestor screen.
  • W
    wbarkerAug 27, 2025
    Why is grass wrapping around the trimmer head of my Toro Trimmer?
    • C
      Christy JohnsonAug 27, 2025
      If grass is wrapping around the trimmer head assembly and attachment shaft of your Toro Trimmer, it may be because you are cutting tall grass at ground level, so try cutting tall grass from the top down. Another cause might be operating the product at part throttle, so operate the product at full throttle.
  • R
    Robert ByrdSep 2, 2025
    Why is oil dripping from the muffler of my Toro 51976?
    • N
      nicholas22Sep 2, 2025
      If oil is dripping from the muffler of your Toro Trimmer, it could be due to operating the product at part throttle, so ensure you operate it at full throttle. Also, check the oil/fuel mixture and use fresh fuel with the correct 2-cycle oil mix. A dirty air filter can also cause this issue, so clean the air filter.
  • K
    Kelly AshleyNov 14, 2025
    How to troubleshoot a Toro 51976 that will not start?
    • K
      Kevin BarrettNov 14, 2025
      If the engine of your Toro Trimmer won't start, several factors could be at play. First, check for a spark by removing the spark plug, reattaching the cap, and laying it on the metal cylinder. Pull the starter cord to look for a spark at the tip. If there's no spark, try a new spark plug. Another possibility is a lack of fuel. Push the primer bulb until it's full; if it doesn't fill, the fuel delivery system might be blocked. Alternatively, the engine could be flooded. Remove the spark plug, turn the product so the spark plug hole faces the ground, ensure the choke is set to RUN, and pull the starter cord 10-14 times to clear excess fuel. Clean and reinstall the spark plug, then pull the starter cord 3 times with the trigger fully depressed. If the starter cord pulls harder than usual, it ...

Summary

Read This Information

Fueling

General Safety Rules

Specific Safety Rules

Trimmer Specific Safety Rules

Safety precautions specific to operating the trimmer.

Product Assembly

Connecting Trimmer Attachments

Attaching the Grass Deflector

Operating Your Trimmer

Fueling and Refueling Guide

Detailed instructions on fueling and refueling safely.

Starting the Trimmer Engine

Procedures for starting the engine, both cold and warm.

Stopping the Trimmer Engine

How to safely stop the trimmer's engine.

Trimmer Operating Procedures

Guidance on how to properly use the trimmer.

Advancing the Cutting Line

Methods for advancing the trimmer line.

Trimming and Cutting Tips

Reel-Easy String Head Line Installation

Step-by-step guide for installing trimmer line.

Trimmer Maintenance Schedule

Air Filter Cleaning and Maintenance

Steps for cleaning the air filter for optimal engine performance.

Replacing the Spark Arrestor

Replacing the Spark Plug

Guide on how to replace the spark plug.

Adjusting Idle Speed

Product Storage Guidelines

Installing Reel-Easy String Head

Troubleshooting Common Issues

Toro 51976 Specifications

General IconGeneral
TypeString Trimmer
Power SourceGas
Engine Displacement25.4 cc
Weight12.3 lbs
Line Diameter0.095 inches
Handle TypeLoop Handle
Engine Type2-Cycle
Cutting Width16 inches
Cutting Swath16 in
Shaft TypeStraight
FeaturesEasy Start

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