Toro 74390 User Manual

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FormNo.3375-743RevB

TimeCutter

®

ZS4200TFRiding

Mower

ModelNo.74390—SerialNo.313000001andUp

Registeratwww.Toro.com.

OriginalInstructions(EN)

*3375-743*B

Table of Contents

Questions and Answers:

R
Ricky PopeAug 8, 2025
Why won't my Toro 74390 Lawn Mower engine start?
- N
  Noah MccoyAug 8, 2025
  Several factors can prevent your Toro Lawn Mower engine from starting. First, ensure the fuel tank isn't empty by filling it. If it is not the reason, make sure the choke is on. A dirty air cleaner can also be the culprit, so clean or replace it. Check that the spark plug wire(s) is securely connected to the spark plug. Inspect the spark plug(s) for damage, and replace if needed. Additionally, ensure the fuel filter is clean, and the fuel tank contains the correct type of fuel. Finally, check that the oil level in the crankcase is sufficient and add oil if needed.
E
Emily SuttonAug 12, 2025
How to fix Toro 74390 Lawn Mower when the engine overheats?
- M
  Mrs. Jessica SmithAug 12, 2025
  If your Toro Lawn Mower's engine is overheating, there are several potential causes. First, reduce ground speed if the engine load is excessive. Check the oil level in the crankcase and add oil if it's low. Inspect the cooling fins and air passages under the engine blower housing for obstructions and remove them. Also, make sure that the air cleaner is not dirty; clean or replace the air cleaner element if necessary.
J
jessicaliAug 17, 2025
Why does my Toro 74390 engine lose power?
- W
  William HowardAug 17, 2025
  If your Toro Lawn Mower engine is losing power, consider these possible causes: The engine load might be excessive, so reduce ground speed. A dirty air cleaner can also cause power loss, 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 under the engine blower housing are free from obstructions. Inspect the spark plug(s) and replace them if pitted, fouled, or incorrectly gapped. Finally, if there is incorrect fuel in the fuel tank, drain the tank and replace the fuel with the proper type.
R
rubenjohnsonAug 21, 2025
How to fix uneven cutting height on Toro 74390?
- M
  Michelle SanchezAug 21, 2025
  To correct uneven cutting height on your Toro Lawn Mower, consider these factors: Sharpen the blade(s) if they are not sharp. Replace any bent cutting blade(s). Level the mower from side-to-side and front-to-rear. Adjust the anti-scalp wheel height if it's not set correctly. Clean the underside of the mower if it's dirty. Adjust the tire pressure to the correct level.
D
Daniel RodriguezAug 26, 2025
What to do if the blades on my Toro Lawn Mower do not rotate?
- A
  Amy JonesAug 26, 2025
  If the blades on your Toro Lawn Mower aren't rotating, check if the drive belt is worn, loose, or broken, and install a new drive belt if necessary. Also, ensure the drive belt is properly positioned on the pulley, and check the adjusting shafts and belt guides for correct positioning. Finally, check if the mower belt is worn, loose, or broken and install a new mower belt if needed.
J
Jeffrey StevensAug 29, 2025
What to do if my Toro 74390 Lawn Mower starter does not crank?
- M
  melissa40Aug 29, 2025
  If the starter on your Toro Lawn Mower isn't cranking, try these steps: Ensure the blade control switch is disengaged. Verify that the motion control levers are in the park position. If the battery is dead, charge it. Check the electrical connections for corrosion or looseness, ensuring good contact. Finally, inspect the fuse and replace it if blown.
A
Angie RichardsonSep 2, 2025
How to stop abnormal vibration in my Toro Lawn Mower?
- M
  Michele BarreraSep 3, 2025
  To address abnormal vibration in your Toro Lawn Mower, check the following: Tighten any loose engine mounting bolts. Ensure the engine pulley, idler pulley, or blade pulley are tightened appropriately. Replace the cutting blade(s) if they are bent or unbalanced. Also, tighten any loose blade mounting bolts.

Toro 74390 Specifications

General

Brand	Toro
Model	74390
Category	Lawn Mower
Language	English

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