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Toro 74143 - User Manual

Toro 74143
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FormNo.3394-290RevA
ZMaster
®
Commercial2000
SeriesRidingMower
with48in,52in,or60inTURBOFORCE
®
Side
DischargeMower
ModelNo.74141—SerialNo.315000001andUp
ModelNo.74143—SerialNo.315000001andUp
ModelNo.74145—SerialNo.315000001andUp
Registeratwww.Toro.com.
OriginalInstructions(EN)
*3394-290*A

Table of Contents

Questions and Answers

  • C
    christopherjamesAug 27, 2025
    Why does my Toro 74143 Lawn Mower engine lose power?
    • D
      Derek WilliamsAug 27, 2025
      Your Toro Lawn Mower engine may be losing power for a number of reasons: the engine load could be excessive, so reduce the ground speed; the air cleaner could be dirty, so clean it; the oil level in the crankcase could be low, so add oil; the cooling fins and air passages above the engine could be plugged, so remove the obstruction; the vent hole in the fuel cap could be plugged, so clean or replace the fuel cap; or there could be dirt in the fuel filter, so replace it. For dirt, water, or stale fuel in the fuel system, contact an Authorized Service Dealer.
  • D
    David BrooksAug 27, 2025
    How to fix uneven cutting height on Toro Lawn Mower?
    • D
      Dr. Vicki HamiltonAug 28, 2025
      To fix an uneven cutting height on your Toro Lawn Mower, start by sharpening any dull blades or installing new ones if bent. Ensure the mower deck is level from side-to-side and front-to-rear. Clean the underside of the mower deck, adjust the tire pressure to the correct level. For a bent blade spindle, contact an Authorized Service Dealer.
  • M
    Michael GreenAug 28, 2025
    How to fix a Toro Lawn Mower engine that loses power?
    • T
      tturnerAug 28, 2025
      If your Toro Lawn Mower engine loses power, first reduce the ground speed to lessen the engine load. Check and clean the air cleaner element if it's dirty. Ensure that the oil level in the crankcase is sufficient by adding oil if needed. Clear any obstructions from the cooling fins and air passages above the engine. Also, verify that the vent hole in the fuel cap isn't plugged; clean or replace the cap if necessary. Lastly, replace the fuel filter if it's dirty.
  • G
    gmurphyAug 29, 2025
    How to troubleshoot uneven cutting height on my Toro Lawn Mower?
    • W
      Wendy HendrixAug 29, 2025
      If your Toro Lawn Mower is leaving an uneven cut, start by sharpening the blades. If the cutting blades are bent, replace them. Ensure the mower deck is level from side to side and front to rear. Clean any accumulated dirt from the underside of the mower. Adjust the tire pressure to the correct levels.
  • Z
    Zachary WoodAug 30, 2025
    Why aren't the blades rotating on my Toro Lawn Mower?
    • J
      Jody MataAug 30, 2025
      If the blades on your Toro Lawn Mower aren't rotating, start by checking the mower deck belt for wear, looseness, or breakage, and install a new deck belt if needed. Ensure the mower deck belt is properly positioned on the pulley, and inspect the idler pulley, idler arm, and spring for correct position and function. Also, check the pump drive belt for wear, looseness, or breakage; check the belt tension or install a new belt. Replace any broken or missing idler springs.
  • A
    Andrea ElliottAug 31, 2025
    Why is my Toro 74143 Lawn Mower engine losing power?
    • J
      Jesus AlvarezAug 31, 2025
      If your Toro Lawn Mower engine is losing power, consider these potential causes: The engine load may be excessive, so reduce your ground speed. A dirty air cleaner can also restrict performance, so clean the air cleaner element. Check the oil level in the crankcase and add oil if it's low. Make sure the cooling fins and air passages above the engine are free from obstructions. Additionally, inspect the fuel cap to ensure the vent hole isn't plugged. Finally, a dirty fuel filter can cause power loss, so replace it if necessary.
  • T
    Thomas JohnsonAug 25, 2025
    Why won't my Toro 74143 engine start?
    • J
      Jeffrey GalvanAug 25, 2025
      If your Toro Lawn Mower engine won't start, starts with difficulty, or stops running, there are several potential causes. First, ensure the fuel tank isn't empty and the fuel shutoff valve is open. Check that the oil level in the crankcase is adequate. For a cold engine, the choke should be in the 'ON' position, while for a warm engine, it should be 'OFF,' and the throttle control should be midway between 'SLOW' and 'FAST'. Other causes could be a dirty fuel filter (replace it), a dirty air cleaner (clean or replace it), or a faulty spark plug (clean, adjust, or replace it). Also, ensure the spark plug wire is connected and the seat switch is functioning properly. Check the electrical connections for corrosion or looseness, clean them, and apply dielectric grease before reconnecting.
  • D
    Destiny JacksonSep 2, 2025
    Why does my Toro Lawn Mower pull left or right?
    • J
      John GonzalezSep 2, 2025
      If your Toro Lawn Mower is pulling to the left or right, the tracking likely needs adjustment. Additionally, ensure that the tire pressure in the drive tires is correct and adjust as necessary.
  • W
    Walter ConnerSep 3, 2025
    What to do if Toro Lawn Mower engine loses power?
    • W
      William DunnSep 3, 2025
      If your Toro Lawn Mower engine is losing power, try the following: * Reduce the ground speed. * Clean the air-cleaner element. * Add oil to the crankcase. * Remove any obstructions from the cooling fins and air passages. * Clean or replace the fuel cap. * Replace the fuel filter.
  • A
    ashleybryantSep 4, 2025
    What to do if Toro 74143 produces an uneven cutting height?
    • J
      Jessica ManningSep 4, 2025
      If your Toro Lawn Mower is producing an uneven cut, try the following: * Sharpen the blade(s). * Install new cutting blade(s). * Level the mower deck from side-to-side and front-to-rear. * Clean the underside of the mower. * Adjust the tire pressure.

Toro 74143 Specifications

General IconGeneral
Model74143
Drive TypeSelf-Propelled
Power SourceGasoline
Deck MaterialSteel
Engine Type4-Cycle
TypeWalk-Behind Mower
EngineBriggs & Stratton
Cutting Width22 inches
Oil Capacity20 oz

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