Toro 74143 User Manual

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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:

R
Ronald AdamsAug 25, 2025
Why is the starter not cranking on my Toro 74143 Lawn Mower?
- B
  Bill KramerAug 26, 2025
  If the starter on your Toro Lawn Mower isn't cranking, several factors could be at play. First, ensure the blade-control switch (PTO) is disengaged. Next, confirm that the parking brake is fully engaged and the drive levers are in the neutral-lock position. Also, make sure you are seated properly. If these aren't the issue, check your battery; it might be dead and require a charge. Corroded or loose electrical connections can also prevent starting, so inspect those for good contact. Lastly, a blown fuse could be the culprit, in which case you should replace it.
J
John FoxAug 26, 2025
Why won't my Toro 74143 Lawn Mower engine start or keep running?
- K
  Kimberly MuellerAug 27, 2025
  If your Toro Lawn Mower engine won't start, starts with difficulty, or stalls, there are several things to check. Begin by ensuring the fuel tank is full and the fuel shutoff valve is open. Verify that the oil level in the crankcase is adequate. Position the throttle control midway between the “SLOW” and “FAST” settings. Replace the fuel filter if it's dirty, and clean or replace the air cleaner if it's clogged. Inspect the spark plug wire connection and clean, adjust, or replace the spark plug if faulty. Also, check the seat switch indicator and replace the seat if needed. Finally, inspect the electrical connections for corrosion or looseness, cleaning and reconnecting them as necessary.
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.
A
Adam JacksonSep 10, 2025
Why does my Toro 74143 Lawn Mower pull to the left or right?
- B
  brianthompsonSep 10, 2025
  If your Toro Lawn Mower pulls to the left or right, it may be due to tracking needing adjustment, so adjust the tracking. Also, the tire pressure in the drive tires may not be correct, so adjust the tire pressure.
M
moorekatherineSep 8, 2025
What to do if my Toro Lawn Mower machine does not drive?
- R
  Raymond PerrySep 8, 2025
  If the machine doesn't drive, make sure the bypass valves are closed tight. If not, tighten them. Check if the pump belt is worn, loose, or broken or off a pulley, and change the belt if needed. Also, see if the idler spring is broken or missing, and replace the spring if necessary. Finally, ensure the hydraulic oil level is not low or too hot; add hydraulic oil to the reservoirs or let it cool down.
D
Danielle MooreSep 9, 2025
What to do if my Toro 74143 Lawn Mower clutch does not engage?
- C
  christine13Sep 9, 2025
  If the clutch does not engage, replace the fuse and check the coil resistance, battery charge, charging system, and wiring connections, and replace components if necessary. Also, check the coil resistance, battery charge, charging system, and wiring connections and replace parts if necessary if there is low voltage supply at the clutch. If the coil is damaged, replace the clutch. If there is inadequate current supply, repair or replace the clutch lead wire or electrical system and clean the connector contacts. If the rotor/armature air gap is too large, remove the shim or replace the clutch.
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.
R
Robert RiosSep 1, 2025
How to fix uneven cutting height on my Toro 74143?
- S
  Shelly BerrySep 1, 2025
  If your Toro Lawn Mower is resulting in an uneven cutting height, several factors could be the cause. Start by sharpening the blades. If the cutting blades are bent, replace them. Check if the mower deck is level from side-to-side and front-to-rear, and adjust if necessary. Clean the underside of the mower deck, and adjust the tire pressure to the correct level.
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.

Toro 74143 Specifications

General

Model	74143
Drive Type	Self-Propelled
Power Source	Gasoline
Deck Material	Steel
Engine Type	4-Cycle
Type	Walk-Behind Mower
Engine	Briggs & Stratton
Cutting Width	22 inches
Oil Capacity	20 oz

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